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CHAPEL HILL ORANGE COUNTY VISITORS BUREAU August 12, 2020 <br />308 WEST FRANKLIN, CHAPEL HILL, NC <br /> <br />JOINT SEALANTS 079200 - 5 <br />PART 2 - PRODUCTS <br />2.1 MATERIALS, GENERAL <br />A. Compatibility: Provide joint sealants, backings, and other related materials that are compatible <br />with one another and with joint substrates under conditions of service and application, as <br />demonstrated by joint-sealant manufacturer, based on testing and field experience. <br />B. VOC Content of Interior Sealants: Provide sealants and sealant primers for use inside the <br />weatherproofing system that comply with the following limits for VOC content when calculated <br />according to 40 CFR 59, Part 59, Subpart D (EPA Method 24): <br />1. Architectural Sealants: 250 g/L. <br />2. Sealant Primers for Nonporous Substrates: 250 g/L. <br />3. Sealant Primers for Porous Substrates: 775 g/L. <br />C. Liquid-Applied Joint Sealants: Comply with ASTM C 920 and other requirements indicated for <br />each liquid-applied joint sealant specified, including those referencing ASTM C 920 <br />classifications for type, grade, class, and uses related to exposure and joint substrates. <br />1. Suitability for Immersion in Liquids. Where sealants are indicated for Use I for joints <br />that will be continuously immersed in liquids, provide products that have undergone <br />testing according to ASTM C 1247. Liquid used for testing sealants is deionized water, <br />unless otherwise indicated. <br />D. Stain-Test-Response Characteristics: Where sealants are specified to be nonstaining to porous <br />substrates, provide products that have undergone testing according to ASTM C 1248 and have <br />not stained porous joint substrates indicated for Project. <br />E. Suitability for Contact with Food: Where sealants are indicated for joints that will come in <br />repeated contact with food, provide products that comply with 21 CFR 177.2600. <br />F. Colors of Exposed Joint Sealants: As selected by Architect from manufacturer's full range. <br />Colors generally to match adjacent materials. <br />2.2 SILICONE JOINT SEALANTS. <br />A. Single-Component, Nonsag, Neutral-Curing Silicone Joint Sealant: ASTM C 920, Type S, <br />Grade NS, Class 100/50, for Use NT. <br />1. Products: Subject to compliance with requirements, provide one of the following: <br />a. Dow Corning Corporation; NS Parking Structure Sealant. <br />b. GE Advanced Materials - Silicones; SilPruf LM SCS2700. <br />c. May National Associates, Inc.; Bondaflex Sil 728 NS. <br />d. Pecora Corporation; 311 NS. <br />e. Sika Corporation, Construction Products Division; SikaSil-C990. <br /> <br />DocuSign Envelope ID: 775B89AF-3514-4D9E-B148-2FDE4EFF16C2