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B. Proceed with installation only after unsatisfactory conditions have been corrected. <br /> 3.02 PREPARATION <br /> A. Surface Cleaning of Joints: Clean out joints immediately before installing joint sealants to <br /> comply with joint-sealant manufacturer's written instructions and the following requirements: <br /> 1. Remove all foreign material from joint substrates that could interfere with adhesion of joint <br /> sealant, including dust, paints (except for permanent, protective coatings tested and <br /> approved for sealant adhesion and compatibility by sealant manufacturer), old joint <br /> sealants, oil, grease, waterproofing, water repellents, water, surface dirt, and frost. <br /> 2. Clean, porous joint substrate surfaces by brushing, grinding, mechanical abrading, or a <br /> combination of these methods to produce a clean, sound substrate capable of developing <br /> optimum bond with joint sealants. Remove loose particles remaining after cleaning <br /> operations above by vacuuming or blowing out joints with oil-free compressed air. Porous <br /> joint substrates include the following: <br /> a. Concrete. <br /> b. Masonry. <br /> c. Stone <br /> 3. Clean nonporous joint substrate surfaces with chemical cleaners or other means that do <br /> not stain, harm substrates, or leave residues capable of interfering with adhesion of joint <br /> sealants. Nonporous joint substrates include the following: <br /> a. Metal. <br /> B. Joint Priming: Prime joint substrates where recommended by joint-sealant manufacturer or as <br /> indicated by preconstruction joint-sealant-substrate tests or prior experience. Apply primer to <br /> comply with joint-sealant manufacturer's written instructions. Confine primers to areas of joint- <br /> sealant bond; do not allow spillage or migration onto adjoining surfaces. <br /> C. Masking Tape: Use masking tape where required to prevent contact of sealant or primer with <br /> adjoining surfaces that otherwise would be permanently stained or damaged by such contact or <br /> by cleaning methods required to remove sealant smears. Remove tape immediately after <br /> tooling without disturbing joint seal. <br /> 3.03 INSTALLATION OF JOINT SEALANTS <br /> A. General: Comply with joint-sealant manufacturer's written installation instructions for products <br /> and applications indicated unless more stringent requirements apply. <br /> B. Sealant Installation Standard: Comply with recommendations in ASTM C 1193 for use of joint <br /> sealants as applicable to materials, applications, and conditions indicated. <br /> C. Install sealant backings of kind indicated to support sealants during application and at position <br /> required to produce cross-sectional shapes and depths of installed sealants relative to joint <br /> widths that allow optimum sealant movement capability. <br /> 1. Do not leave gaps between ends of sealant backings. <br /> 2. Do not stretch, twist, puncture, or tear sealant backings. <br /> 3. Remove absorbent sealant backings that have become wet before sealant application and <br /> replace them with dry materials. <br /> D. Install sealants using proven techniques that comply with the following and at the same time <br /> backings are installed: <br /> 1. Place sealants so they directly contact and fully wet joint substrates. <br /> 2. Completely fill recesses in each joint configuration. <br /> 3. Produce uniform, cross-sectional shapes and depths relative to joint widths that allow <br /> optimum sealant movement capability. <br /> E. Tooling of Non-sag Sealants: Immediately after sealant application and before skinning or <br /> curing begins, tool sealants according to requirements specified in subparagraphs below to <br /> form smooth, uniform beads of configuration indicated; to eliminate air pockets; and to ensure <br /> contact and adhesion of sealant with sides of joint. <br /> SEA00511 / Prologis - SEA00511 07 9200 - 3 JOINT SEALANTS <br /> - FY24- Everett 1 - Capital <br /> Roofing Project <br />