2.01 JOINT SEALANT APPLICATIONS A. Scope: 1. Exterior Joints: a. Do not seal exterior joints unless indicated on drawings as sealed. b. Seal the following joints: 1) Joints between doors, windows, and other frames or adjacent construction. 2) Joints between siding members. 2.02 JOINT SEALANTS - GENERAL A. Colors: As indicated on drawings. 2.03 NONSAG JOINT SEALANTS A. Type S - Polyurethane Sealant: ASTM C920, Grade NS, Uses M and A; single component; not expected to withstand continuous water immersion or traffic. 1. Movement Capability: Plus and minus 25 percent, minimum. 2. Color: Match adjacent finished surfaces. 2.04 ACCESSORIES A. Sealant Backing Rod, Closed-Cell Type: 1. Cylindrical flexible sealant backings complying with ASTM C1330 Type C. 2. Size: 25 to 50 percent larger in diameter than joint width. B. Backing Tape: Self-adhesive polyethylene tape with surface that sealant will not adhere to and recommended by tape and sealant manufacturers for specific application. C. Masking Tape: Self-adhesive, nonabsorbent, nonstaining, removable without adhesive residue, and compatible with surfaces adjacent to joints and sealants. D. Joint Cleaner: Noncorrosive and nonstaining type, type recommended by sealant manufacturer; compatible with joint forming materials. E. Primers: Type recommended by sealant manufacturer to suit application; nonstaining.
