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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 /> 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 100150, 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 /> JOINT SEALANTS 079200 - 5 <br />