For a professional-looking paint job, caulk before you paint, and when time is short, reach for ALEX Fast Dry(TM). It’s ready to paint in 30minutes. No need to worry about paint cracking; this durable, flexible sealant is made to last and comes with a 35 Year Durability Guarantee. Easy water clean-up. Interior/exterior use. Exceeds ASTM Specification C 834.