This 100% silicone sealant for windows, doors, and siding provides a watertight seal that won't crack, crumble, or shrink. It begins to harden one to two hours after application and is fully cured after 24 hours. Once cured, it is unaffected by temperature extremes of -40 Degrees C. This environmentally friendly sealant has a flash point of 100 Degrees F and comes in a 300-millilitre tube.