Surfboard repair fiberfil.  

SOLAREZ is clear, non yellowing mixture of high strength, chop-strand fiber reinforced polyester resin and an amazing solar activated catalyst. There is no mixing required, just use it straight from the tube. It cures in 3 minutes (even at temperatures of -20°F)
Because Solarez hardens so quickly, it emits up to 95% less VOC’s.

Comes with 60/240 grit sand pad.