Products / Sikalastic-621 TC

Sikalastic-621 TC is a cold-applied, single-component, aliphatic, moisture-triggered polyurethane resin used as the embedment, saturating and top coat resin of the Sikalastic-621 roofing system, reinforced with fiberglass mat or polyester fleece to form a seamless membrane and flashing. It ships in 5 gal (19 L) pails. Its data sheet lists ASTM E108 and ASTM C836, prints a Class A ASTM E108 external fire result, and reports a solar reflectance of 0.85 and an SRI of 108 for white.