<p>Moisture / Air Curing Rubber | Black color (400) Red color (410). Cures to a low durometer solid. DO NOT expose unused material to air or moisture. A partial cure occurs in approx. 5 minutes. Mix with a Dry-Pak fiber mixture to ensure curing as quickly as possible throughout the cross section and to increase the bridging capabilities of the rubber (wetting the fibers with water will speed up the curing process). Whenever possible, try to expose the rubber to water or steam as it is injected. Shelf-life is 1 year in closed containers. </p><h2>Applications</h2><p>Flanges, Enclosures, Water service, Void fill</p>