The 411 Microsphere Blend is a low density filler used as a thickening agent with Epoxy Resin to create a lightweight filling putty that is used to seal the blank in preparation of glassing.
Provided in a powder form, Microsphere Blend is easily mixed with Epoxy Resin to form a white paste that is spread evenly over the EPS Blank. In effect this blend seals the foam, ensures an even surface and prevents any out-gassing that may occur when laminating.