STP FLEX features: Advanced hybrid compound technology Perfect adhesion to substrates Short curing Results in finished surfaces which are coatable wet on wet with water-borne or thinner basecoats Very long chemical activity: coatable for 10 days after sealing High stability and good weather resistance Good sound-proofing and vibration-damping performance Isocyanate free: does not irritate the skin or airways during use The STP FLEX Sprayable Sealant ensures perfect adhesion to bare (non-primed) substrates (carbon steel, galvanized sheets and aluminium), acrylic or epoxy basecoats, and old paint coats. The product can regenerate the original sealant textures on car bodies.