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INDIAN RIVER COUNTY — NORTH COUNTY REGIONAL PARK PAGE 3 <br />AQUATIC FACILITY ROOFING REPLACEMENT SECTION 079200 <br />JUNE 7, 2019 JOINT SEALANTS <br />2.5 JOINT SEALANT BACKING <br />A. Cylindrical Sealant Backings: ASTM C 1330, Type C (closed -cell material with <br />a surface skin), and of size and density to control sealant depth and otherwise <br />contribute to producing optimum sealant performance. <br />B. Bond -Breaker Tape: Polyethylene tape or other plastic tape recommended by <br />sealant manufacturer. <br />2.6 MISCELLANEOUS MATERIALS <br />A. Primer: Material recommended by joint -sealant manufacturer where required <br />for adhesion of sealant to joint substrates indicated, as determined from <br />preconstruction joint -sealant -substrate tests and field tests. <br />B. Cleaners for Nonporous Surfaces: Chemical cleaners acceptable to <br />manufacturers of sealants and sealant backing materials. <br />C. Masking Tape: Nonstaining, nonabsorbent material compatible with joint <br />sealants and surfaces adjacent to joints. <br />PART 3 - EXECUTION <br />3.1 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. <br />1. Remove laitance and form -release agents from concrete. <br />2. Clean nonporous joint substrate surfaces with chemical cleaners or other <br />means that do not stain, harm substrates, or leave residues capable of <br />interfering with adhesion of joint sealants. <br />B. Joint Priming: Prime joint substrates where recommended by joint -sealant <br />manufacturer or as indicated by preconstruction joint -sealant -substrate tests or <br />prior experience. Apply primer to comply with joint -sealant manufacturer's <br />written instructions. Confine primers to areas of joint -sealant bond; do not allow <br />spillage or migration onto adjoining surfaces. <br />C. Masking Tape: Use masking tape where required to prevent contact of sealant <br />or primer with adjoining surfaces that otherwise would be permanently stained <br />or damaged by such contact or by cleaning methods required to remove <br />sealant smears. Remove tape immediately after tooling without disturbing joint <br />seal. <br />