For use with all Bastion Waterproofing Membranes. 1 Porous substrates 8 4. EDP-0977(653)--7Y-29 . 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). Ideally this should be accomplished by mechanical means. Widths from 1" (25 mm) to 12" (300 mm) and custom shapes are available in a wide variety of colors and textures. 5 Butyl Rubber Based 2. Reinforcing Fabric maximises membrane strength in vulnerable areas such as corners and construction joints and doesn't compromise the flexibility of the waterproofing system. Note width-depth ratio, concaveJointflex® Backer Rod are used in joints in pre-cast and cast-in-situ concrete elements to give support to the joint sealant application, aid in the correct joint sealant geometry (application depth and shape) and prevent the joint sealant from adhering to the top of the expansion joint filler board (3-way bonding), acting as a bond breaker. 375” to 0. All oil, dirt, debris, paint and any other material that may be a bond breaker must be removed. The sealant must be a minimum 6mm in depth at the mid-point of the bond breaker joint and extend a minimum 6mm on either side of the joint or gap. Sealants. narrow joints. Because many backup materials act as bond breakers, a separate bond breaker ma-terial is not always required. Use a sealant backing or. Closed cell backer rod diameter should be larger (i. The cured. JOINT BACKING BOND BREAKER Joint backing should be used to control the recommended joint depth and prevent 3-sided adhesion. EXAMINATION. Bastion 100mm x. 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. Self-adhesive, non -woven, polyester fabric for strengthening membranes. Joint Depth The joint must be deep enough to allow proper placement of the sealant and a bond breaker/backer rod. essential that bond breaker tape or polyethylene closed cell backer rod be used to regulate joint depth and prevent three sided adhesion. Commonly. Follow the manufacturer’s instructions. For joints greater than 1 inch (25. 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. Bond breaker tape or backer rod must be used in bottom of joint to prevent bond. • Backer rods, joint fillers or bond breakers must be tight to the sides of the joint to prevent loss of sealant through the bottom. Depth = ½ Width. 6144. It is important for the sealant to bond to joints in two places so it can expand properly. Two sided adhesion allows sealant to stretch with joint movement. One step in the preparation of a mastic sealant joint is filling or backing out the gap prior to mastic sealant application. When sealing joints and gaps, avoid three-sided adhesion by using bond breaker tape and/or backer rod. 5”use a 1:1 width to depth ratio and joints wider than . In fact, some types of joint fillers can serve as a backing material and bond breaker, in which the applicator can apply the sealant directly on the filler. 2 Bond Breaking Tapes PART 3 EXECUTION 3. Contact CRL Customer Service. Our Jeff Schmucker created a visual to explain the importance of using bond breaker tape in secondary containment systems. The use of a bond breaker is not required in expansion joints containing Fosroc Hydrocell or Expancell cellular polyethylene expansion joint fillers. Bond Breaker. Bond Breakers in Waterproofing Systems. Meets ASTM C920, Type S, Grade NS,. 1 litre can, average coverage 10m2Bond breaker and closed cell back-up material for use with joint sealants. Back up material controls the depth of sealant in the joint. B. There is no reason why the membrane can’t stick to the bond breaker, provided the bond breaker material is capable of accommodating movement. 4. Sikasil®-728 SL can be used on. Material shall act as a bond breaker and shall be circular in cross section. Features. When a bond breaker is needed at a construction joint, a curing compound, form release agent and the like can act as a bond breaker. In addition, DOWSIL™ 890-SL Silicone Joint Sealant can be used on asphalt. 08 APPLICABLE PUBLICATIONS: A. Use CRL Bond Breaker Tape to create proper two-way sealant bonds. Compatible with Davco K10. Use CRL Bond Breaker Tape to create proper two-way sealant bonds. Bastion 100mm x 50M Bond Breaker Joint Band is a waterproof reinforcing and bond breaking band that is used as wall/floor junctions to protect the most critical areas of the waterproofing application. the sealant during joint tooling, inherently directing the tooling force laterally to the sides of the joint to cause the sealant to wet the substrates, which promotes an adhesive bond. Bastion Bond Breaker Joint 100mm either side of joint Wash down with appropriate Sealant should be applied and in the case of a cleaner and flush with fresh to produce 12mm x 12mm designated shower area the water and allow to dry Loose minimum coved bead over total wall area 100mm rose or damaged membranes change of plane joints . use polyethylene bond breaker tape to prevent three-sided adhesion. A high-performance Bond Breaker Joint Sealant to. 6 Silicone Rubber Base. 3 BOND BREAKERS 2. 3 Synthetic Rubber 2. Backer rod Sealant. Bond breaker Tape is black self-adhesive. For use in hori-zontal joints in traffic areas, the absolute minimum depth of the sealant is 1/2” and closed cell backer rod is recommended. the sealant joint depth (measured at the center) should always fall between the maximum depth of ½" and the minimum depth of ¼". Sikaflex® MS bonds well to: Concrete and masonry Cement plaster systems Aluminium, copper, brass and zinc Stainless, mild or galvanised steel Glass and ceramic tiles 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 experience movement; Using braided sealant backing to compensate for a joint opening that is too large for it Buy products online from our wide range. substrate. Unlike AIFB joint filler products, Nomaflex is: 1. The bond breaker shall serve to ensure that the bottom of the sealant is bond free, thereby allowing the sealant to adhere only to the sides of the joint. 3. PART 3 - EXECUTION. 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). Acting as the required system "bond breaker", the B10 Joint Band will accommodate movement in longitudinal, lateral and transverse directions enabling high elongation, rupture resistance and up to 100% elastic. A bond breaker is therefore employed to minimise the stresses by providing bond relief and ensuring proper functionality of the membrane. A thorough wire brushing, grinding,Fastflex (formerly branded as Isoflex) extends the service life of concrete by acting as an insulator in isolation joints and expansion joints while acting as a bond-breaker for sealants. D. in deep joints, the sealant depth must be controlled by closed cell backer rod or soft backer rod. 4. Provide backup material that is a compressible, non-shrinking, non-staining, non-absorbing material, nonreactive with the joint sealant. - Substrate gaps at drainage outlets, flashings,. CURE & TILT WB cures the concrete floor or casting slab and top sides of panels once poured. Ideally this should be accomplished by mechanical means. Sikaflex-1a can be used in green and damp concrete applications. The sealant must bond to only two surfaces such as. Sika® Foam Backer Rod Closed Cell has excellent cpmression and recovery properties, is available and various sizes and lengths. D. D. Bond Breaker Polyethelene Tape Black Roll used in shallow building joints to prevent 3 sided adhesion. Provide bond breaker (tape or rod). PU sealants are mistakenly used as a bond breaker, where a neutral cure silicone should be installed. Function #6: Serve as a bond breaker1. Bastion 100mm x 50m Waterproof Reinforcing Fabric (0) $19. A roughened surface will also enhance bond. This is when the sealant is adhered to the bottom and both sides of the joint. Bolt down the collar to the drain flange. 3. Expansion/Contraction: 50% (±25%) as per ASTM C719. For construction or contraction joints a bond breaker tape or back-up strip should be used. Joint Width Inches (mm) Joint Depth. Tape Bond Breaker 1 84 1 8 to D (D=Conc. Apply sealer materials using handguns or pressure equipment with proper nozzle size. Hotwire 1200W 8m² Heating Mat (0) $1008. Elastic reinforcement essential for the critical movements areas. Use CRL Bond Breaker Tape to create proper two-way sealant bonds. Suitable for use with Bastion waterproofing membranes. JOINT SEALANTS SECTION 07 92 00 JOINT SEALANTS PART 1 - GENERAL 1. 2 mm) thick, and has high adhesion to steel or other structural metals. Find us. Sealants can help pre-Joints shall be designed with a depth to width ratio of 1:2 (joint depth one-half the width). Use CRL Bond Breaker Tape to create proper two-way sealant bonds. 55. Thick. A high-performance Bond Breaker Joint Sealant to provide extra protection and flexibility in vital joints for all waterproofing applications. The ratio of joint width of sealant to depth should be 2:1. It is important for sealant to bond to joints in two places so it can expand properly. Acts as the bond breaker for the waterproofing system eliminating need for other sealants/tapes. ) Not 3 D to 1 4 Saw Cut Or Parting Strip 1 TAPE BOND BREAKER PREFORMED ELASTOMERIC COMPRESSION SEAL BACKER ROD BOND BREAKER BACKER ROD BOND BREAKER TAPE BOND BREAKER CONCRETE-CONCRETE JOINTS CONCRETE. • Backer rods, joint fillers or bond breakers must be tight to the sides of the joint to prevent loss of sealant through the bottom. Where hydrostatic pressure exists, only bond breaking tapes must be used, notBond Breakers Bond breakers prevent three-sided adhesion of the seal-ant (i. There are two important factors to remember when applying sealant. Bond-Breaker Tape: Polyethylene tape or other plastic tape recommended by sealant manufacturer for preventing sealant from adhering to rigid, inflexible joint-filler materials or joint surfaces at back of joint where such adhesion would result in sealant failure. e. to internal corners and changes in wall/wall; hob/wall junctions, pipe penetrations, tap bodies, water stops, drainage outlets or similar • Bond breaker joints must be a minimum 12mm x 12mm coved bead of sealant. 421. Bond breaker tape prevents adhesion to the back of shallow three-sided joints. If depth exceeds 1/2", use backer rod. 01 WORK INCLUDED A. - 1 - Types of bond breakers Bond breakers can be flexible sealants like silicone or polyurethane, bond breaker tapes, fabric mesh or foam rods. Suitable as a back-up filler for most liquid sealants Ideal for stopping contaminants such as soil entering into expansion slots and joints. Compare. Second, it aids in achieving an ideal shape of the sealant (e. The use of a bond breaker is not required in expansion joints containing cellular polyethylene joint filler, backing rod (Vetoflex PBR). 1. A joint sealant can fail over time due to: any of the options are correct. Customer Service: 1. Sealant backing. 3 m ConsumptionA low-modulus plastic sealant, such as silicone, may have a ratio of 1:3. Note: Not recommended for fire applications. • Excellent substrate adhesion. Add to Cart. 1. 6 cm) thick but no greater than 1/2 inch (1. surface conditioner or primer, type of sealant backing material, bond-breaker, and joint ®ller, among others. contraction to maximize accommodation of movement. Joint dimension of 4X anticipated movement allows proper function of high performance sealants even if applied at temperature extremes. 3. Latex sealant used with silicone sealant to provide bond breaker for use where minimal depth is available. D. See full list on ncma. If joint depth does not allow for backer rod installation, use polyethylene bond breaker tape. And fourth, it simplifies tooling. USE TYPE 2A SEALANT FOR JOINTS AND CRACKS 3/16" OR LESS IN WIDTH (LIMITED COLOR CHOICE). 0m / 5. b. As elastomeric sealants will not bond to Polyboard PE, the additional need for bond breaker strips is eliminated. Click here to access Bastion 600mL Bond Breaker and MS Joint Sealant – User Guide. For most effective results, dura. 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. Note: do NOT use masking tape, electrical insulation tape or ‘Gafa’ tape as a bond breaker tape. For metal butt joints Bond Breaker Tape is applied to metal edges so the sealant can be "buttered" over the joint and canexposure to atmospheric moisture. Applying the waterproofing membrane is the final step. Elastic reinforcement essential for the critical movement areas. With a. The bond breaker tape stops the sealant from adhering to the surfaces and prevents three-sided adhesion. minimum 12mm x 12mm coved joint. Inside Corner Joint: Where substrates are abutting and no-to-minimal joint movement is anticipated , provide bond breaker tape in the corner extending no less than ” (6 mm) out from the corner in BOTH 1/4 directions (see Image 2). MasterSeal NP 2 sealant. . Bond height. APPLICATION RANGE Performance Levels Commercial and residential Location Internal wet areas, balconies, decks, and other areas that will be tiled or otherwise protected from regular foot traffi c. Add to Cart. Gripset BRW Fillet: A preformed butyl rubber profile designed for use at wall/floor junctions as an integral part of the Gripset BRW Sheet waterproofing system. , 11 Saw Cut Or Formed Joint Compression Seal 16" Preformed Elastomeric 9 Not Required For Construction Joints. A WATER REPELLENT, WAX BASED BOND BREAKER MATERIAL DESCRIPTION Sika® BondBreaker W is a water repellent, wax based bond breaker material. 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. Where a particularly neat finish is required, mask. 3 Hot rolled acc. 6144. Dimension C must be at least 6 mm (1/4”). B. 1. Size: 5 Metre x 100mm Roll. g. 68 (150) Surface and ambient temperature minimum 40-100 maximum 14 days ChemMasters Aquanil Plus 100 (P)(1) Clean, free from dirt, dust, laitance, oil, grease, paints, curing or sealing compounds, tilt up bond breakers or other contaminants 1 Application: 9. Get free delivery on eligible items or orders across Australia's favourite brands with OnePass. Bastion 100mm x 10m Bond Breaker Waterproofing Joint Band (1) $25. Compressible Joint Sealant : Install compressible sealant in joint to depth recommended by manufacturer. Hotwire 1200W 8m² Heating Mat (0) $1008. Install tap flanges. To properly install sealant, you need to provide a joint between two materials. Waterproof – Nomaflex will not absorb water and will remain in place for years. Primers may be applied to the sides of joints to provide a good bond between them. • For joints subject to puncture by high heels or umbrella points, a stiffer or higher density backup material is required. e. However, it is important to note that most backer rods can serve as a bond. All joint facings must possess an open surface texture. 800. This is to ensure a tight compressed fit. Bastion 15kg Under Tile. The cured sealant. 5. The number of joints and the joint width should be designed for a maximum of ± 35% joint movement from the initial joint width. Tape shall be removed immediately after the tooling. Contact CRL Customer Service. A WATER REPELLENT, WAX BASED BOND BREAKER MATERIAL DESCRIPTION Sika® BondBreaker W is a water repellent, wax based bond breaker material. Tough, elastic, rubber-like seal. Polyethylene tape is the most. Publications are referenced in text by basic designation only. 5 Bond Breaker Rod: The bond breaker rod shall be a closed cell, expanded polyethylene foam rod of the size and dimensions shown in the Plans. Polyethylene tape for isolating sealant and eliminating adhesion to filler boards Select PARCHEM BOND BREAKER TAPE 15MM x 66M ROLL PARCHEM BOND BREAKER TAPE 20MM x 66M ROLL PARCHEM BOND BREAKER TAPE 25MM x 66M ROLL PARCHEM BOND. Typical expansion joint Thioflex 600 Pouring Grade Bond Breaker Tape Recess Hydrocorr Typical construction joint Thioflex 600 Pouring Grade Bond Breaker Tape. Cork or rigid non-impregnated cane-fiber joint fillers are suitable. CHARACTERISTICS / ADVANTAGES Easy application by brush or sprayer Non - Hazardous, Non Toxic Non - Staining Customer Service: 1. Hardie™ Joint Sealant 300ml Cartridge. Compare. Latex sealant used with silicone sealant to provide bond breaker for use where minimal depth is available. bond breaker tape sealantnext audible sale 2022. Open cell polyurethane foam or closed cell polyethyleneSilicone WP Plus sealant is available in translucent, grey and white and is also suitable for use as a finishing and roof & gutter sealant. 2 PRIMERS 2. Filler: A sealant backing used behind a back-up rod. Available in: - 100mm. See table below. Use CRL Bond Breaker Tape to create proper two-way sealant bonds. 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. e. Anti Fungal. 01 EXAMINATIONSuitable back-up material, duracord, must be used to adjust sealant depth in the joint to comply with the joint geometry cited in the table. 2. Allow for proper sealant tooling. It is important for the sealant to bond to joints in. org Bi-cellular sealant backing: composed of both open and closed cell polyethylene or polyolefin foam with a surface skin. Des Moines County . 3. Featuring the central “Flexible Zone” the Aquaband can accommodate movement in longitudinal, lateral and transverse directions enabling high elongation,. 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)joint movement can be accommodated in a thin bead of sealant than in a thick bead. Excellent adhesion; Flexible joint sealant; Single component; BITUMASTIC GP. , Inc. 3. Where hydrostatic pressures are present, compression should be to approximately 40% of its original size. Surfaces Walls & fl oors. 6. The cured sealant is durable and flexible enough to accommodate ± 50 percent movement of original joint dimension when installed in a properly designed weather seal joint. Typically there are three components to the Bond Breaker System; a Fillet; bond-breaker tape and a waterproofing membrane. 01 SECTION INCLUDES. These ensure that: adhesion is between the substrates only (no perpendicular stress from the back of the joint to weaken the focus on the connection between the substrates) the sealant is supported on the back side as tooling. Closed cell backer rod should be about 1⁄ 8" (3 mm) larger in diameter than the width of the joint to allow for compression. Polyethylene tape is commonly used as bond breaker tape. Lightweight – Nomaflex weighs 75%. bridge joint in a variety of applications , including restoration of failed sealant joints. Fast cure (FC) polyurethanes or Modified Silyl terminated sealants (MS) may. A. 46. 2. Sikaflex-11 FC Sikaflex®-11 FC is a one part, moisture curing, elastic joint sealant and multipurpose adhesive based on. • Wider joints (minimum of 1/4" width): as wider joints can accommodate more movement than narrow joints. 2 Trial Joint Sealant Installation 1. ) The sealant should have a minimum bond of 1/4 inch on the side of the joint and a depth of 1/8 inch to 3/8 inch at the center. compounds, tilt up bond breakers or other contaminants 1 Application: 3. Service temperature -50˚C to +120˚C. ® cord. Product Downloads. In joints where polystyrene or bitumen impregnated fillers have been used, Abelflex is ideal as a bond-breaker. )it into the joint channel without stretching it lengthwise. Rp5. Types of bond breakers. Where hydrostatic pressure exists, only If the joint or crack becomes contaminated, damp, or wet, remove the bond breaker if it has been installed. joint sealant and no bond or reaction shall occur between the rod and the sealant. B. Bond. Recommended Backing MaterialsThe bond breaker tape shall be approximately 1/8 inch wider than the nominal width of the joint and shall not bond to the joint sealant. Also available in grey and white. A bond breaker is therefore employed to minimise the stresses by providing bond relief and ensuring proper functionality of the membrane. Closed cell backer rod should be 25 % larger than joint width; do not compress more than 40%. Priming is not usually necessary. • is impacted by sealant joint MOC (including the substrate Adhesion: Sealant joint failures in the biomedical facility environment are frequently due to. Bond breakers can be a silicone or polyurethane sealant, or preformed bond breaking corners and tapes. 94. 03 APPLICATION A. The sealant does not adhere to it, and no separate bond breaker is required. It cures under the influence of atmospheric moisture to form an elastomeric material with adhesive properties, in some cases without the need for priming of the substrate. No bond or adverse reaction shall occur between the bond2. 0-6. highest paying part-time jobs in germany for international students 2022 / 10 / 02Expansion Joints - - All expansion joints must be isolated from the membrane by a minimum 12mm wide bond breaker tape that covers the entire width & length of the joint. Read More. Compare. 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. 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. CURE & TILT WB is used as a cure and bond breaker in tilt-up, lift-slab, and precast concrete construction. e. 1. Plus, it will retain its original diameter and is non-gassing when exposed to high sealant temperatures. Stays resilient within a wide temperature range. JOINT DIMENSIONS Joint size should not exceed 1/2" wide x 1/2" deep. In such cases, the use of bond breaker tape in lieu of backer rod is acceptable. 4 BACKUP MATERIAL. Floor tiling with a 3mm joint size may include silicone filling to full depth, as long as a bond breaker is installed to the backing substrate to maintain two-wall adhesion. When a bond. General purpose polyutherane exterior grade joint sealant. b. Pavt. 000. 000. 4. Approved bondbreaker system conforming to AS 3740; Time saving simplified installation • Eliminates need for sealant bondbreakers and tapesContractor Polyurethane Sealant Permanently flexible with ± 25% movement capability. 5 mil Low-Density Polyethylene Film Tape is frequently used after installing anchor rods in concrete to prevent cracks in the concrete surface. 4 mm), do not exceed 1/2 inch (13 mm) in depth. 2 PVC 2. Uses: BestBond Joint Sealant permanently fills and seals cracks in concrete, stone, masonry, and most rigid surfaces. to EN 13108-1 and mastic asphalt acc. Maintain Section format, including the UH master spec designation and version date in the center columns of the header and footer. Where the joint depth does not permit the use of backer rod, a bond breaker (polyethylene strip) must be used to prevent three-point bonding. Rp435. EN 13108-6 8. Ableflex will assist with reducing environmental elements such as sand and soil penetrating the expansion slot or joint. Email Us. Gripset BRW Fillet: A preformed butyl rubber profile designed for use at wall/floor junctions as an integral part of the Gripset BRW Sheet waterproofing system. Joint 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. Bond Breaker Tape is a polyethylene tape used to prevent 3-point adhesion in shallow caulk joints or joints where backer rod cannot be used. SAW-CUT CONTROL JOINT SEALANT AND BACK-UP BOND COAT CONCRETE OR MASONRY BACK-UP STRUCTURAL JOINT FLEXIBLE SEALANT BOND BREAKER TAPE CERAMIC TILE Expansion Joint – CEJ171 Construction Joint – CEJ171a Isolation/Expansion Joint – CEJ171d Technical Services 800-282-8786. Material shall act as a bond breaker and shall be circular in cross section. 5 m ~ 4. In addition, many backup materials also serve as bond breakers. Use bond breakers that are chemically inert and resistant to oils, gasoline, solvents, and primer, if one is required. Visit your local store for the widest range of products. While the principle of bond breaking is not new and applies to waterproofing and other industries such as joint. 180. The cured sealant. 0m To ensure that the correct joint width-to-depth ratio is achieved and to prevent the sealant from adhering to the bottom of the joint, it is highly recommended to use a tight- Sikaflex-PRO Sikaflex-PRO is a one component, thixotropic, polyurethane based joint sealant. Deep joints should incorporate a backing strip such as Sika PEF Rod to support the sealant while also acting as a bond breaker. C. Home DIY; Trade; Waterproofing. 6144. Bastion Bond Breaker to be used as a flexible bond. characteristic values of the joint sealant and the adjacent building materials, the exposure of the building elements, their construction and size. Simply raking debris out of the joint with hand tools is not sufficient. Contact CRL Customer Service. (6. preventing pipe from contact with the outer sleeve. Bond Breakers or masking tape Bond breakers prevent three-sided adhesion of the sealant (i. No bond breaker material; therefore the joint will not. • For a joint size larger than 1 inch, the depth should be kept to between . Fastflex is an ideal choice for concrete. cord must be inserted into the joint to a depth that will accommodate the depth of sealant specified i. Do not prime or puncture the backer rod. Most substrates only require priming if sealant will be subjected to water immersion after cure. Bond Breaker for extra protection. polyethylene bond breaker tape to prevent three-sided adhesion. , measured at the center point of the joint width. 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. 3 mm). The joint slot width when 4. Waterproofing membranes. Third, it provides support for the joint sealant. - 1 - Types of bond breakers Bond breakers can be flexible sealants like silicone or polyurethane, bond breaker tapes, fabric mesh or foam rods. Rod Closed Cell provides bond breaking, assists in the control of joint depths for correct joint design and re-ducing sealant consumption. 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. The backer rod most importantly acts as a bond breaker, preventing what is referred to as three sided adhesion or three point bonding. PART 3 - EXECUTION 3. "Min. substances such as over bond breakers or incorporating other reinforcement. $9 . 800. Apply moderate pressure to break seal inside the nozzle. sticking to the bottom of the joint and then tearing when the joint opens. therefore, sealant wastage is reduced. A rigid joint filler or sealant backing in joints that will experience movement. Sealant for concrete and masonry facades. 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.