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DocuSign Envelope ID:D561B1AE-DF34-4907-AD06-AOEB37BBE427 <br /> CHAPEL HILL ORANGE COUNTY VISITORS BUREAU August 12,2020 <br /> 308 WEST FRANKLIN,CHAPEL HILL,NC <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 tooling <br /> without disturbing joint seal. <br /> 3.3 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 bond-breaker tape behind sealants where sealant backings are not used between sealants <br /> and backs of joints and where shown on the drawings. <br /> E. 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 /> F. Tooling of Nonsag Sealants: Immediately after sealant application and before skinning or <br /> curing begins,tool sealants according to requirements specified in subparagraphs below to form <br /> smooth, uniform beads of configuration indicated; to eliminate air pockets; and to ensure <br /> contact and adhesion of sealant with sides of joint. <br /> 1. Remove excess sealant from surfaces adjacent to joints. <br /> 2. Use tooling agents that are approved in writing by sealant manufacturer and that do not <br /> discolor sealants or adjacent surfaces. <br /> 3. Provide concave joint profile per Figure 8A in ASTM C 1193, unless otherwise <br /> indicated. <br /> 4. Provide flush joint profile where indicated per Figure 8B in ASTM C 1193. <br /> 5. Provide recessed joint configuration of recess depth and at locations indicated per <br /> Figure 8C in ASTM C 1193. <br /> a. Use masking tape to protect surfaces adjacent to recessed tooled joints. <br /> G. Installation of Preformed Silicone-Sealant System: Comply with the following requirements: <br /> JOINT SEALANTS 079200 - 11 <br />