WS411 WEST SYSTEM MICROSPHERES BLEND 411 - 1000 ML is backordered and will ship as soon as it is back in stock.
– Lightweight Filling Additive. A blend of inorganic hollow spheres and colloidal silica toform a light white, low density adhesive/ filling putty.Mixing guide : 1.20 litres resin to 2.00 litres powder.