4 BACKSTOPS 2. Joint walls must be sound, clean, dry, frost-free, and free of oil and grease and any other contaminants. WPA MS is a single component, moisture cured silane modified hybrid sealant free of solvents and isocyanates, with a very low VOC content. Hybrid MS Polyurethane sealant is designed for use as a bond breaking sealant as part of Crommelin liquid applied waterproofing membrane systems and is also suitable as a general purpose construction joint sealant and construction adhesive. SEALING OF LARGE MOVEMENT JOINTS HYPALON SHEETING COMPATIBLE, PROVEN ADHESIVE SEALANT BOND BREAKER TAPE CONCRETE SEALANT BACKER ROD (COMPRESSED. Commonly. There are two major purposes of sealants in joints: (1) the sealant fills space, creating a seal, and must maintain that seal throughout the useful life of the structure. Bond Breaker Strips. What’s more is that CERA-ROD is great for use with hot-applied joint sealants—it is proven not to melt, shrink, evaporate or stain. Bond breaker tape prevents adhesion to the back of shallow three-sided joints, which can cause splitting failure in the sealant. This clear, tough plastic tape with a clear polyethylene adhesive backing is eight mils (. 3 BOND BREAKERS 2. Use a sealant backing or. Publications listed below form a part of this specification to extent referenced. Sealant B. Apply the right amount of sealant. No bond or adverse reaction shall occur between thebond breaker and the sealant. Special Order. bond breaker tape sealant. - Will not discolor sealants or substrates. Bond Breakers: A type of sealant backing. Approval of the backer rod or bond breaker tape shall be made by the Engineer. formed joints a polyethylene bond breaker tape must be used to prevent sealant from adhering to the back face of the joint. Mastic is a form of sealant or adhesive used to fill the joints or as a bond for different materials and gaps. 375” to 0. 3. Bond breaker tape: primarily a self-adhesive polyethylene or teflon material; Not recommended materials A rigid joint filler or sealant backing in joints that will. g. provides a non-stick surface to prevent sealant 3-sided adhesion. Allow for proper sealant wetting of the joint surfaces. Bond breakers Bond breakers in the form a tape is made of PVC or metal or paper. 3 Primer Application 8 4. 5” use a 2:1 width to depth ratio to accommodate movement. Thick. SKU: EUCO7002G. Fastflex is an ideal choice for concrete. 1 DESCRIPTION: A. SOF-SEAL® or any hot-applied sealant, such as HI-SPEC®, can be used to protect the joint. Because many backup materials act as bond breakers, a separate bond breaker ma-terial is not always required. , measured at the center point of the joint width. The installation of solvent based polyurethane joint sealants beneath water based membranes can result in a breakdown in the membrane through solvent release. Maintain Section format, including the UH master spec designation and version date in the center columns of the header and footer. The maximum depth is ½” (13 mm) and the minimum is ¼ inch (6mm). Joint Sealant 300ml Cartridge| Exterior polyurethane joint sealant, general purpose by. Thioflex 600 is a multi-component joint sealant, based on a liquid polysulphide polymer, which when mixed and applied, cures to form a tough, rubber-like seal. 4 BACKUP MATERIAL. Allow for proper sealant tooling. Type 2A Sealant: One-part acrylic or elastomeric sealant for sealing small joints; PTI 200 or Tremco Small Joint Sealant, Pecora AC-20. Fast cure (FC) polyurethanes or Modified Silyl terminated sealants (MS) may. Bond Breakers. 15 (After two weeks @ 190°F)Expanded PTFE joint sealant - Super Seal PTFE 3mm x 10mm x 15 m. 2. Rp5. Hardie™ Joint Sealant 300ml Cartridge. Figure 4 shows a section of sealant removed from a failed joint. 605-2. Tape Bond Breaker 1 84 1 8 to D (D=Conc. The 2” sealant tail shall be pulled at an angle of 90° or more from the wall face until the. In joints up to 0. Install bond breaker tape between sealants and joint-fillers, compression seals or back of joints where adhesion of sealant to surfaces at back of joints would result in sealant failure. typically up to 25% larger) than the actual width of the joint to provide a friction fitfrom the driving surface and should show necessary joint fill-ers, sealant backing, bond breakers, and bonding surfaces. 2 mm) thick, and has high adhesion to steel or other structural metals. The maximum depth is 1/2 inch (13 mm) and the minimum is 3/8 inch (10 mm). A bond breaker must be installed at areas subject to movement, wall/wall junction, wall/floor junction, sheet joints and seams, penetrations and. D. Priming Priming is not usually necessary. 11) Bedding The application of mastic to fill gaps or voids. EDP-0977(653)--7Y-29 . 180. Rp365. Davco K5 Bond Breaker is a neutral cure silicone designed to be used as a bond breaker in the installation of Class II & III waterproofing membranes. Bond Breakers Sec 2 2-3 ® ® Guide to Tilt-Up Bondbreakers A bond breaker is a ‘material used to prevent adhesion of the newly placed concrete to the substrate’*. Get free delivery on eligible items or orders across Australia's favourite brands with OnePass. Tool as required, although minimum tooling is necessary. Aquaband Bond Breaker. Third, it provides support for the joint sealant. Bond Breaker Tape stops joint sealants from adhering to surfaces and preventing “3-sided adhesion” which limits the ability of the sealant to accommodate movement. 3 m ConsumptionA low-modulus plastic sealant, such as silicone, may have a ratio of 1:3. It is important however that the sealant/bond breaker rain screens are backed by aJoint Sealant Material To Be 8") (w +1 Tape Bond Breaker Or Crack Existing Joint Saw Cut Or Formed Joint 4"" to 1 8 1 4"" to 1 8 1 32" Max. Pavt. Minimum depthA. used. preventing pipe from contact with the outer sleeve. 7. The cured sealant. The ideal working joint depth is 1/4" (6 mm). • For joints subject to puncture by high heels or umbrella points, a stiffer or higher density backup material is required. Apply the masking tape on the edges of the both the joint faces. Sealing joints must be accessible and repairable. Filler: A sealant backing used behind a back-up rod. Because many backup materials act as bond breakers, a separate bond breaker material is not always. Install bond breaker tape or backer rod to prevent bond at base of joint. Sealant backer material is available in three types: Type I, Type II, and Type III, and serves one or more of the following purposes: (1) limits the amount and depth of sealant applied to a joint, (2) acts as a barrier interface to prevent backside adhesion (bondbreaker), and (3) provides a form to assist the sealant in developing a shape factor. 932-1. ® cord must be inserted into the joint to a depth that will accommodate the depth of sealant specified. Note: Not recommended for fire applications. • Neutral cure – will not corrode concrete or zinc coated. It seems insignificant, but some sort of bond breaker — backer rod or grip strip or clear packing tape — is the difference between a long-lasting, durable caulking and chinking job and redoing the work year after year. Where hydrostatic pressure exists, only If the joint or crack becomes contaminated, damp, or wet, remove the bond breaker if it has been installed. For good adhesion, the joint interface must be sound, clean and dry. Acting as the required system "bond breaker", the B50 Joint Band will accommodate movement in longitudinal, lateral and transverse directions enabling high elongation, rupture resistance and up to 100% elastic recovery 💪 Clean joint surface, free from dust and other contaminants. A bond breaker material shall be installed prior to installation of the sealant to maintain minimum or maximum depth of sealant. Suitable for most water-based paints. Expansion/Contraction: 50% (±25%) as per ASTM C719. D. Closed cell backer rod diameter should be larger (i. 1 The primer used should be as named on the 4. )it into the joint channel without stretching it lengthwise. Features & Benefits . Where a particularly neat finish is required, mask the face edges of the joint before sealing and remove immediately after tooling is. 5 Priming 4. 1 Introduction. 1 "Min. 7. Sika® Duoflex NS is a two component, non-sag, premium quality polysulfide sealant, specifically designed for vertical and overhead surfaces. Do not use bond breaker that will stain or adhere to the sealant. BUTT JOINTS: if you would like to install a butt joint, due to its high risk of movement joint failure. A bond breaker is therefore employed to minimise the stresses by providing bond relief and ensuring proper functionality of the membrane. Add to Cart. 2 Trial Joint Sealant Installation 1. Use CRL Bond Breaker Tape to create proper two-way sealant bonds. Stays resilient within a wide temperature range. " The sealant should bond only to the substrates that will be moving. 5”. Compatible with Davco K10. A roughened surface will also enhance bond. Bond Breaker Tape: Catalog number 827T by C. Excellent adhesion – bonds to most construction materials without a primer. If the sealant bonds in the wrong areas, it may tear or stretch to the point of failure. • For a joint size larger than 1 inch, the depth should be kept to between . - An extra 900-micron (0. e. 3. Proper design is 2:1 width to depth ratio. - Compatible with cold-applied sealants. Bond breaker systems can be optimized by installing foam backing rod in the junctions, on top of the cured membrane, before laying the screed. CHARACTERISTICS / ADVANTAGES Esay to use Closed cell Asists with joint design Assists with sealant profile Provides bond breaker Compatible with cold applied sealants (polyurethane, silicone) sealing slot before positioning a bond breaker. The surface of a building component or joint that serves as a substrate for sealant and to which the sealant is bonded. The bond breaker tape stops the sealant from adhering to the surfaces and prevents three-sided adhesion. The bond breaker allows for 2-sided rather than 3-sided adhesion, which permits much greater elasticity of the sealant. Pre-Installation Conference—Many specifications re-quire that a pre-installation conference be held among the parties involved in the joint sealant construction, includinggetter. For most effective results, dura. Thick. Bond breaker tape or backer rod must be used in bottom of joint to prevent bond. Dampfix Platinum Bostik Australia Pty Ltd, Level 1, 6 English Street, Essendon Fields, Victoria, 3041, Australia. With a. Sika Sikaflex 1A Polyurethane Elastomeric Joint Sealant And Adhesive - 20 Ounce Sausage. Submit manufacturer's detailed technical data for materials, fabrication, and installation, including catalog cuts of bond breakers, backer rods, and accessories. Add to Cart. For most effective results, dura. In addition, DOWSIL™ 890-SL Silicone Joint Sealant can be used on asphalt. The work includes caulking and sealing of joints as required to seal the perimeters of openings in walls, penetrations in walls, expansion and control joints, and as required to. Bond breaker tape is black polypropylene tape that provides an option to break the bond of the sealant between the joints between the surfaces of the concrete. JOINT SEALANTS SECTION 07 92 00 JOINT SEALANTS PART 1 - GENERAL 1. If joint depth does not allow for backer rod installation, use polyethylene bond breaker tape. In instances where the joint configuration will not permit a backer rod it is recommended that the use of an alternative bond breaker be used. Bond Breaker Strips. 5”. Always use bond breaker tape or closed cell backer rod for support on horizontal joints. Consisting of a unique grade of rubber, the Bond Breaker Waterproofing Joint. custom crochet animals / leyland cypress hedge / bond breaker tape sealant. Publications listed below form a part of this specification to extent referenced. Backer rods should be used when you need to increase elasticity in sealant, reduce caulk consumption by controlling sealant depth, force adhesive into contact for enhanced bonding, or to create a “bond-breaker” which allows the joint to be easily cleaned out and refilled. The backer rod most importantly acts as a bond breaker, preventing what is referred to as three sided adhesion or three point bonding. Control the depth of the sealant by using a polyethylene backer rod that is 25% larger than the joint opening at standard temperature. The minimum requirement for appropriate Bond Breaker application is outlined in Table 3. DIVISION 7 2 Joint Sealant 07 92 00Joints without Bond Breaker– three sided adhesion causes joint failure. G. from adhering to the back of a raked joint or to the backup), allowing the sealant to freely deform in response to building movements (see Figure 1c). As we11 as the backup material having been either poorly positioned for depth, or inadequately held so that it moved when the sealant was applied. You can simply use a bond breaking sealant or preformed bond breaking corner, tape and pipe sleeves. This clear, tough plastic tape with a clear polyethylene adhesive backing is eight mils (. When used as a "backing" in expansion joints or cracks to help control the amount of sealant used or the depth of the sealant in the gap, the backer rod serves two primary functions. joint. 1. 5”use a 1:1 width to depth ratio and joints wider than . Innovative detailing system designed for waterproofing and sealing all types of joints, junctions and general areas subject to movement. One step in the preparation of a mastic sealant joint is filling or backing out the gap prior to mastic sealant application. G. Apply sealant using consistent, positive pressure to force sealant into the joint. Lightweight – Nomaflex weighs 75%. Ideally this should be accomplished by mechanical means. The bond breaker tape stops the sealant from adhering to the surfaces and prevents three-sided adhesion. Sikaflex® MS has been formulated for sealing joints in and around concrete, brick, masonry, pre-cast panels, stone cladding, windows, doors and fibre cement sheeting. It incorporates a self-adhesive portion (central 1/3 of tape) that acts as a bondbreaker - over joints, cracks or other. 75 . )Sika® Tite Undertile is a membrane with high extensibility and is designed for use with a 12mm Bond Breaker, a bead of Sika® Neutral Cure silicone must be tooled off to form a 12mm wide bond breaker. Reinforcing Mesh Embedded in Base Coat G. For optimum performance, the width of the sealant bead should be approximately two times the depth. Pavt. 4. 9 mm) wet coat extending a minimum 35mm either side of the bond breaker tape must be applied as an extra coat. Thick. , the vendor recommends appropriate field testing be performed to verify that all desired/required appearance. Good adhesion to many substrates. They also keep the contents of tanks, pipes, canals, and dams in. This question is taken from book named – A Self Learning Manual – Mastering. Bond Breakers: A type of sealant backing. Ableflex will assist with reducing environmental elements such as sand and soil penetrating the expansion slot or joint. For construction or contraction joints a bond breaker tape or back-up strip should be used. contraction to maximize accommodation of movement. - Substrate gaps at drainage outlets, flashings,. Back-up Rod: A type of sealant backing. As elastomeric sealants will not bond to Polyboard PE, the additional need for bond breaker strips is eliminated. • Three-sided adhesion limits the amount of movement that a joint can accept before failing. It is commonly used in applications such as expansion and contraction joints, curtain walls, construction partitions, parking decks and bridge construction. 6 Silicone Rubber Base. The sealant must bond to only two surfaces such as. Often necessary because of the sealant in-compatibility with these forms of fillers. Aquaband is an innovative detailing system designed for waterproofing and sealing all types of joints, junctions and general areas subject to movement. • Backer rods, joint fillers or bond breakers must be tight to the sides of the joint to prevent loss of sealant through the bottom. Silicone WP Plus • Neutral cure, anti-fungal formulation. contraction to maximize accommodation of movement. C. Bond Breaker for extra protection. Add to Cart. Apply moderate pressure to break seal inside the nozzle. SUBMITTALS. Laurence Co. $9. Clean and dry the joint or crack and install a new bond breaker before placing the sealant. Always use bond breaker tape or closed cell backer rod for support on horizontal joints. Install bond breaker tape or backer rod to prevent bond at base of joint. 03 APPLICATION A. Function #6: Serve as a bond breaker1. Approval of the backer rod or bond breaker tape shall be made by the manufacture and engineer. (6. A further 2 full coats, at 900bond free, thereby allowing the sealant to adhere only to the sides of the joint. In this con-Compact sealant into joint with a wet wooden spatula and smooth off to the desired finish. 2. No bond or adverse reaction shall occur between the bond breaker and the sealant. Apply a fillet to all wall and floor junctions, and if a timber or cement based sheet has been used apply a sealant to the joint between the sheeting. Priming is typically not necessary. The maximum depth is 1/2 inch (13 mm) and the minimum is 3/8 inch (10 mm). Sealing joints must be accessible and repairable. 5 m ~ 7. Click here to access Bastion 300ml Bond Breaker Joint Sealant – User Guide When you’re in need, we’re here to help ! We offer a range of services including plumbing ,. SJ-03 Butt Type Sealant Joint with Latex Sealant Bond Breaker Butt-Type Sealant Joint Bonds two materials, typically 1/4” of adhesion needed on the surface, joint width varies by system. Install bond breaker tape over substrates when sealant backings are not used. Sealant backer material is available in three types: Type I, Type II, and Type III, and serves one or more of the following purposes: (1) limits the amount and depth of sealant applied to a joint, (2) acts as a barrier interface to prevent backside adhesion (bondbreaker), and (3) provides a form to assist the sealant in developing a shape factor. Bond Breaker. (Vetoflex PBR). • Excessive sealant depth will result in. D. Bond. )SECTION 07 9200 - JOINT SEALANTS. Concrete and steel are typical substrates used with bond breakers, as they are non-metallic or metallic anti-stick materials. narrow joints. It is important for sealant to bond to joints in two places so it can expand properly. The sealant does not adhere to it, and no separate bond-breaker is required. • Apply closed cell polyethylene backer rod or bond breaker tape into joint to prevent 3 sided adhesion of the sealant. For expansion joints, sealant manufacturers recommend that the contact depth should be equal to one-half the sealant joint width. with Bond Breaker . 3. Use CRL Bond Breaker Tape to create proper two-way sealant bonds. joint sealing or in flooring applications such as saw cuts jointing. D. • Excessive sealant depth will result in. 2. Suitable as a back-up filler for most liquid sealants Ideal for stopping contaminants such as soil entering into expansion slots and joints. 02. Contact CRL Customer Service. THESE ARE SPECIAL PROVISIONS AND THEY SHALL PREVAIL. Tool as required to properly fill joints and force sealant against joint interfaces, maximizing bond. When cured it forms a tough, flexible seal and bond, capable of cyclic expansion and compression movement. Protect surfaces with masking tape. The sealant does not adhere to it, and no separate bond breaker is required. In joints too shallow to take a backer rod, use a bond breaker tape to prevent three-sided adhesion. For use with all Bastion Waterproofing Membranes. For joints greater than 1 inch (25. and of size and density to control sealant depth and otherwise contribute to producing optimum sealant performance. Joint Sealant 300ml Cartridge| Exterior polyurethane joint sealant, general purpose by James Hardie. Provide backup material that is a compressible, non-shrinking, non-staining, non-absorbing material, nonreactive with the joint sealant. 3. Product code: 305534. Hot backer rod is a backstop material for most hot-pour sealants used to fill contraction and expansion joints of concrete highways, runways, driveways, and parking lots. 94. Sealant bead should be a minimum 1/4 inch (. This allows membrane release from the bond breaker, into a compressible medium. Apply sealer materials using handguns or pressure equipment with proper nozzle size. Joint dimension of 4X anticipated movement allows proper function of high performance sealants even if applied at temperature extremes. Bond Breaker: When required, pressure-sensitive polyethylene tape, teflon tape, or other plastic tape as recommended by the sealant manufacturer for the location, to prevent bond of sealant in heel of joint. 5 Butyl Rubber Based 2. Product code: 305534. coatings, and any other material that may be a bond breaker must be removed. - Gives proper shape to sealant for effective function. Bastion 100mm x 10m Bond Breaker Waterproofing Joint Band (1) $25. Backer Rod is an i ntegr al component of sealant joints, it provides three main functions that allow the sealant joint to perform. FIBRE. The use of a bond breaker prevents undesirable three-sided adhesion. You can use bond breakers to improve joint performance. Approved bondbreaker system conforming to AS 3740; Time saving simplified installation • Eliminates need for sealant bondbreakers and tapes Crommelin Bond Breaker Bandage 100mm x 50M Bond-breaker tape made of non-woven polyester fabric called Crommelin Polyfab BB is self-adhesive and intended to be installed over joints, fissures, or other places where structural movement is anticipated. Emer-Proof Joint Seal Tape is a wet area grade elastic joint bandage, designed for use in waterproofing critical movement zones within internal and external wet areas. Open cell polyurethane foam or closed cell polyethylene Bastion 300ml Bond Breaker Joint Sealant (0) $9. Finish Coat F. In acoustical applications, apply 1/4" (6 mm) minimum. Featuring the central “Flexible Zone” the Aquaband can accommodate movement in longitudinal, lateral and transverse directions enabling high elongation,. - All bond breaker joint sealant profiles must be a minimum 6mm in depth at the mid-point of the joint. The rainscreen principle attempts to: prevent wind-driven water from breaching a curtain wall by equalizing the air pressure on both sides of the wall. Effective Date . use polyethylene bond breaker tape to prevent three-sided adhesion. But when a sealant material is required, a portion of the filler is removed to form the necessary space for the sealant and its backing material (if required). • For use as a bond breaker or general purpose construction sealant. The type of bond breaker required under the above mentioned. 0m / 2. EXAMINATION. This article discusses the features of mastic sealants in the construction industry. B. Innovative detailing system designed for waterproofing and sealing all types of joints, junctions, and general areas subject to. Help centre;Crommelin Reinforcing Fabric is a non-woven, rot proof polyester fabric for use in conjunction with Crommelin liquid applied waterproofing membranes. A narrow deposit of sealant applied to a building. Discount Sealants, Caulks and Adhesives, Adhesive Sealants, NP1, SL1, Expansion Joint Sealants, Backer Rod, RV sealants, Glass Sealants, Deck and pool Sealants. Proper design is 2:1 width to depth ratio for movement joints. Apply sealant into joint slot in one direction and allow sealant to flow and level out as ne-cessary. To prevent three-point adhesion use a backer rod or bond breaker tape to ensure proper joint movement and a long lastingDOWSIL™ 888 Silicone Joint Sealant and DOWSIL™ 890-SL Silicone Joint Sealant are one-part silicone formulations that can be extruded from -20°F to 120°F. Where hydrostatic pressure exists, only bond breaking tapes must be used, not foamed back-upNeutral cure silicone used as a bond breaker. Bond Breakers: A type of sealant backing. The primary function of a joint sealant is to prevent the intrusion of un-wanted substances into or through the joint. There are two important factors to remember when applying sealant. 3 Low Modulus Silicone Sealant: 932. Joint-Sealant: One-part silicone sealant, having a joint movement capability of plus-or-minus 100% elongation, minus 50% compression, and Shore A durometer hardness of 15. Where the joint depth does not permit the use of backer-rod, a bond breaker (polyethylene strip) must be used to prevent three-sided adhesion. 1 SEALANTS 2. 1. Also avoid applying sealants in ambient conditions where threat of rain is imminent. Where hydrostatic pressure exists, only bond breaking tapes must be used, not foamed back-up. Primers may be applied to the sides of joints to provide a good bond between them. Davco K5 Bond Breaker is a neutral cure silicone designed to be used as a bond breaker in the installation of Class II & III waterproofing membranes. thickness of sealant, waste, application techniques, etc. Thioflex 600 is a multi-component joint sealant, based on a liquid polysulphide polymer, which when mixed and applied, cures to form a tough, rubber-like seal. 0-6. 5 m ~ 2. SJ-03 Butt Type Sealant Joint with Latex Sealant Bond Breaker Butt-Type Sealant Joint Bonds two materials, typically 1/4” of adhesion needed on the surface, joint width varies by system. prevent bond. 020 8524 1931. Closed cell backer rod should be 25 % larger than joint width; do not compress more than 40%. NOTE 1—This legend applies to Figs. External walling and cladding Expandafoam Closed Cell is used as a backing strip forMasterSeal NP 2 sealant. It shall be compatible with the joint sealant and no bond or reaction shall occur between the rod and the sealant. Never use open cell rod in on grade horizontal joints. CHARACTERISTICS / ADVANTAGES Easy application by brush or sprayer Non -. Remove any masking tape immediately after applying Paraseal. Primer. Install bond-breaker tape behind sealants where sealant backings are not used between sealantsBond breaker tape: primarily a self-adhesive polyethylene or teflon material. Mastic Sealant. Home DIY; Waterproofing. . Click here to access Bastion 600mL Bond Breaker and MS Joint Sealant – User Guide. Waterproof – Nomaflex will not absorb water and will remain in place for years. 1 Rubber 2. It is important for the sealant to bond to joints in two places so it can expand properly. It is important for the sealant to bond to joints in two places so it can expand properly. 2 PVC 2. Self Adhesive Butynol Tape that is the ultimate in bond breaking. Sealants will fail in cohesion (split) if bonded on. prevent bond. Our backer rod (backstop / bond breaker), is designed to work with all popular sealants including NP1 Polyurethane, a Novalink Polyether, M1, Duralink, glazing sealants and self leveling sealants like Novalink SL or SL1 and SL2, as well as butyls, polyurethane, silicones, tri-polymers, polysulfide. PART 3 - EXECUTION 3. This is when the sealant is adhered to the bottom and both sides of the joint. the joint opening at standard temperature. Elastic reinforcement essential for the critical movements areas. duracord is a self-releasing material, but if soft-board or cork is used as the joint filler, a plastic strip bond-breaker must be placed on the filler surface before sealant is applied. 4. in deep joints, the sealant depth must be controlled by closed cell backer rod or soft backer rod. 1/4” deep (6mm X 6mm). Customer Service: 1. • For a joint size larger than 1 inch, the depth should be kept to between . (Class 1225) - are generally more resistant to such damage. BOND BREAKER TAPE CONCRETE SEALANT BACKER ROD (COMPRESSED) COMPRESSION FILLER The diagrams shown below depict the relationship between joint design and the maximum strain (S) on the parabolic surface of a Sikaflex® joint sealant. Bond Breaker Polyethelene Tape Black Roll used in shallow building joints to prevent 3 sided adhesion. in optimal conditions, the depth of the sealant should be ½ the width of the joint. it into the joint channel without stretching it lengthwise. Long term sealing protection at volatile areas. Backer rod Sealant. 421. Silicone sealants are used to seal joints in a wide variety of construction applications. When the joints have been filled with fibre filled board, this must be raked back to the required depth. Master Wall® System Latex Sealant as Bond the joint shall be mechanically cleaned by water or sand blasting. 3 Synthetic Rubber 2. assist cold-applied sealants in developing the proper shape factor to prolong the sealant service life.