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C. Bond -Breaker Tape: Polyethylene tape or other plastic tape recommended by sealant <br />manufacturer for preventing sealant from adhering to rigid, inflexible joint -filler <br />materials or joint surfaces at back of joint where such adhesion would result in sealant <br />failure. Provide self adhesive tape where applicable. <br />D. When proposing paintable silicones using acrylic latex paints make special <br />consideration that these products must be painted within seven days of placement of <br />sealants. Refer to manufacturer's literature for proper sequence of applications. <br />2.7 MISCELLANEOUS MATERIALS <br />A. Primer: Material recommended by joint -sealant manufacturer where required for <br />adhesion of sealant to joint substrates indicated, as determined from preconstruction joint - <br />sealant -substrate tests and field tests. <br />B. Cleaners for Nonporous Surfaces: Chemical cleaners acceptable to manufacturers of <br />sealants and sealant backing materials, free of oily residues or other substances capable of <br />staining or harming joint substrates and adjacent nonporous surfaces in any way, and <br />formulated to promote optimum adhesion of sealants to joint substrates. <br />C. Masking Tape: Nonstaining, nonabsorbent material compatible with joint sealants <br />and surfaces adjacent to joints. <br />PART 3 - EXECUTION <br />3.1 EXAM NATION <br />A. Examine joints indicated to receive joint sealants, with Installer present, for <br />compliance with requirements for joint configuration, installation tolerances, and other <br />conditions affecting joint -sealant performance. <br />B. Proceed with installation only after unsatisfactory conditions have been corrected. <br />3.2 PREPARATION <br />A. Surface Cleaning of Joints: Clean out joints immediately before installing joint <br />sealants to comply with joint -sealant manufacturer's written instructions and the <br />following requirements: <br />1. Remove all foreign material from joint substrates that could interfere with <br />adhesion of joint sealant, including dust, paints (except for permanent, protective <br />coatings tested and approved for sealant adhesion and compatibility by sealant <br />manufacturer), old joint sealants, oil, grease, waterproofing, water repellents, <br />water, surface dirt, and frost. <br />07900-7 <br />