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sealant backer rod substrate

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Backerseal Pre Compressed Wall Joint Sealant 183 Sika Emseal

Sealant Application 1 Sealant Backing Choose the appropriate sealant backing based on the available joint depth Sealant backing will prevent three sided adhesion control sealant depth and allow for tooling to ensure proper sealant substrate contact cylindrical backer rod is typically installed and should be approximately 25 2015 11 16 nbsp 0183 32 If using backer rod the material should be 25 wider than the joint set to a depth 189 the width of the joint and should not be compressed punctured or squeezed during installation Geometry There are numerous sealant details but all of them should address the same principle avoid three sided adhesion

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Hidden but essential

2021 11 3 nbsp 0183 32 on actual field samples of substrate from the jobsite or on representative samples from the same lots Contact Technical Services for details Joint Backing Backer rod controls the depth of the sealant and allows it to be applied under pressure Use a size that will compress 25 Denver open cell polyurethane2022 2 18 nbsp 0183 32 The backer rod supports tooling so after installation of material the sealant can be pushed to the bond line with a spatula ensuring wet out of the sealant to the substrate The final main feature of the backer rod is that is promotes an hour glass shape

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Backer Rod Backer Rod Manufacturer from Ahmedabad

If the wall design creates a gap between the primary sealant line of the curtain wall and substrate then an ETA system can help bridge inherent gaps It is possible to include a line of sealant and backer rod at the typical line of protection at the 2018 12 5 nbsp 0183 32 Weatherproofing Sealant or DOWSIL™ 795 Silicone Building Sealant with closed cell backer rod For other EIFS to EIFS joints use DOWSIL™ 790 Silicone Building Sealant with closed cell or soft type backer rod A thin sealant joint 1 4 177 1 8 depth will accommodate more movement than a thick joint Sealants are designed to deliver

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BACKING RODS Unipro

Backer Rod Use of Sealant Joint Backing Materials – Pecora Corporation Technical Bulletin 106 Backer rod and backer tape are used to control the joint depth and to prevent the back of a sealant joint from contacting surfaces to 2021 10 8 nbsp 0183 32 The backer rod supports tooling so after installation of material the sealant can be pushed to the bond line with a spatula ensuring wet out of the sealant to the substrate The final main feature of the backer rod is that is promotes an hour glass shape This maximizes the bond area but keeps the depth of sealant consistent in the

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HB SEALANT

2006 10 1 nbsp 0183 32 Sealed joints comprise a substrate usually aluminium or concrete a primer e g a silane or an isocyanate dissolved in an organic solvent the sealant itself a polymer base with additives such as pigments fillers and catalysts and the backer rod which is generally an expanded polymeric material polyethylene PE or polyurethane PU 2021 3 11 nbsp 0183 32 Sealant Backer Rod Substrate There are three main types of backer rods open cell closed cell and bi cellular Bi Cellular backer rod is flexible and very compressible extruded shape usually cylindrical with a surface skin that is composed of both open and closed cell material

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Selection and Use of Sealants on the Exterior Building Envelope

2021 6 2 nbsp 0183 32 For installation behind liquid sealant and backer rod Set Backerseal sufficiently deep into joint to allow for installation of properly sized backer rod set at its appropriate depth For installation behind directly applied sealant Set Backerseal1 4 6 mm – 3 8 10 mm back from the face of the joint 2010 6 23 nbsp 0183 32 backer rod A thin bead of sealant 1 4 quot 177 1 8 quot depth will accommodate more movement than a thick bead Optimum performance is also delivered when the sealant bead is shaped like an hourglass formed from round backer rod at the bottom and tooling the top with a rounded spatula tool Based on the above information sometimes you will

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Correct Backer Rod Size for Every Joint Width Full Chart

2013 11 8 nbsp 0183 32 functioning of the joint sealant 2 To install compress backer rod into the joint before sealants are applied 3 Install backer rod using a blunt probe or a plain faced roller to force the rod to the desired depth 4 A template or roller gauge may be used to control the depth at which the rod is placed 5 DO NOT stretch backer rod during 2015 9 2 nbsp 0183 32 6 6 There are five basic steps for proper joint preparation and sealant application 1 Clean – Joint surfaces must be clean dry dust free and frost free 2 Prime – If required primer is applied to the clean surface s 3 Pack – Backer rod or bond breaker as required 4 Shoot – Sealant is applied by pushing the bead into the joint

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INSTALLATION GUIDELINE POLYQuik Joint Sealants

2022 2 24 nbsp 0183 32 class 25 means that the joint sealant was tested for 177 25 movement The letters included in the class e g LM describe the seal ants modulus and its elastic behaviour ́ Low modulus LM joint sealants stay soft and exert low stress to the sealant substrate interface also at low tem peratures They are commonly used for facade joints and inSealant is pushed against the backer rod and pressed into an hourglass shape allowing it to stretch properly Without tooling the bond area between the sealant and the sides of the joint may not be sufficient to prevent the sealant from

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Sika 174 SEALANTS REFERENCE GUIDE

2022 1 19 nbsp 0183 32 Round Backer Rod for Cold and Hot Applied Sealants ASTM D 5249 Type 1 of diameter and density required to control sealant depths and prevent bottom side adhesion of sealant C joint sealant manufacturer based on preconstruction joint sealant substrate tests or prior experience 2022 2 24 nbsp 0183 32 Why use backer rod – Attain proper wetting of substrate when sealant is tooled – Control sealant depth 189 maximum – Prevent 3 sided adhesion –

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Method Statement for Application Of Sealant For Joint Exposed to

2022 2 23 nbsp 0183 32 Construction Sika Backing Rod 174 1 2 Product Data Sheet Edition 2 2015 Version no 12 2014 Sika Backing Rod 174 Sealants Back Up Material Product Description Sika Backing Rod 174 is manufactured from extruded polyethylene available in ro d sw i thf enam l g Uses Sika Backing Rod 174 is used as a back up material for cold applied Sika sealants to2019 1 16 nbsp 0183 32 through a backer rod discoloring the sealant Depending on specific field applications and adjacent materials the properties critical to and required for a project may vary However for the purposes of comparing several sealants and substrates adhesion is tested