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DocuSign Envelope ID: 313DA256 -1EDE- 4396- A716- 4C53B809027E <br />JERRY M. PASSMORE CENTER ADDITION AND RENOVATION <br />HILLSBOROUGH, NORTH CAROLINA <br />kffll;�hf C1I1I _Iwr/_V1IM0["L9]K►YM.y5 Aff111 W <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. <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 />G. Acoustical Sealant Installation: At sound -rated assemblies and elsewhere as indicated, seal <br />construction at perimeters, behind control joints, and at openings and penetrations with a <br />continuous bead of acoustical sealant. Install acoustical sealant at both faces of partitions at <br />perimeters and through penetrations. Comply with ASTM C 919 and with manufacturer's <br />written recommendations. <br />JOINT SEALANTS 079200-7 <br />