West System 411 Microsphere Blend Filler

Microsphere blend is a low density filler ideal for fairing and coving. The colloidal silica in the mixture gives excellent resistance to sag and the silicate microspheres extend the filler and allows for easy sanding after curing. You can also use it as part of the glue make up when bonding low density cores such as PVC foams where the glue joint can be difficult to fair without damaging either side.