FLEX 40 combines the speed and elasticity of hot melt glue sticks with the strength and versatility of construction adhesives. It is ideal for a range of applications including carpet tack strips to concrete, floor transition strips, wood moldings and trim, vinyl cove and stair nosings, ceramic and glass tile repair, and more. FLEX 40 offers 40 seconds of open (working) time, instant tack, and a full strength bond in 5 minutes or less.