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SHSC HVAC and Roof Replacement Smith Sinnett / 2020072 <br />Orange County, North Carolina <br /> <br />JOINT SEALANTS 07 92 00 - 4 <br />a. Provide for interior concrete slab joints to receive floor finishes. <br />2. Products: Subject to compliance with requirements, provide one of the following: <br />a. Chem-Calk 950; Bostik Construction Products Div. <br />b. Vulkem 45; Mameco International, Inc. <br />c. NR-201 Urexpan; Pecora Corp. <br />d. Sonolastic SL-1; Sonneborn Building Products Div., Rexnord Chemical Products Inc. <br />E. One-Part Nonacid-Curing Silicone Sealant: Type S, Grade NS, Class 25, and complying with the <br />following requirements for Uses and additional joint movement capability: <br />1. Uses NT, G, A, and, as applicable to joint substrates indicated. <br />a. Additional capability, when tested for adhesion and cohesion under maximum cyclic <br />movement per ASTM C 719, to withstand the following percentage changes in joint width <br />as measured at time of application and remain in compliance with other requirements of <br />ASTM C 920 for Uses indicated: <br />b. 50% movement in both extension and compression for a total of 100% movement. <br />c. Provide for flashing and sheet metal joints as required, and elsewhere as indicated. <br />2. Products: Subject to compliance with requirements, provide one of the following: <br />a. Chem-Calk N-Cure 2000; Bostik Construction Products Div. <br />b. Dow Corning 790; Dow Corning Corp. <br />c. Siliglaze N SCS 2501; General Electric Co. <br />d. Silipruf SCS 2000; General Electric Co. <br />e. 864; Pecora Corp. <br />f. Rhodorsil 5C; Rhone-Poulenc Inc. <br />g. Spectrum 1; Tremco Inc. <br />h. Spectrum 2; Tremco Inc. <br />2.3 JOINT SEALANT BACKING <br />A. General: Provide sealant backings of material and type which are nonstaining; are compatible with joint <br />substrates, sealants, primers and other joint fillers; and are approved for applications indicated by sealant <br />manufacturer based on field experience and laboratory testing. <br />B. Sealant Backer Rod: Provide compressible rod stock of polyethylene foam, polyurethane foam, <br />polyethylene jacketed polyurethane foam, butyl rubber foam, neoprene foam or other flexible, permanent, <br />durable nonabsorptive material as recommended by sealant manufacturer for back-up of and <br />compatibility with sealant. Where used with hot-applied sealant, provide heat-resistant type which will <br />not be deteriorated by sealant application temperature as indicated. <br />C. Bond Breaker Tape: Provide polyethylene tape or other plastic tape as recommended by sealant <br />manufacturer, to be applied to sealant-contact surfaces where bond to substrate or joint filler must be <br />avoided for proper performance of sealant. Provide self-adhesive tape where applicable. <br />2.4 MISCELLANEOUS MATERIALS <br />A. Joint Primer/Sealer: Provide type of joint primer/sealer recommended by sealant manufacturer for joint <br />surfaces to be primed or sealed. <br />B. Cleaners for Nonporous Surfaces: Provide nonstaining, chemical cleaners of type which are acceptable <br />to manufacturers of sealants and sealant backing materials, which are not harmful to substrates and <br />adjacent nonporous materials, and which do not leave oily residues or otherwise have a detrimental effect <br />on sealant adhesion or in-service performance. <br />C. Masking Tape: Provide nonstaining, nonabsorbent type compatible with joint sealants and to surfaces <br />adjacent to joints. <br />DocuSign Envelope ID: 94E7997D-4F29-42F6-A9B4-0A160438D2A6