Wood Mastic Fast Bi is a powder form sealer specially designed for large reparations on wood going up to 7 mm deep. Solvent free and odorless, Wood Mastic Fast Bi is prepared with water and hardens rapidly in 40 minutes. The reparation will have similar properties of wood, it can be sawn, screwed, limed, sanded, stained, waxed and varnished just like wood does.

The finish is hard and dense enough to be used with stencils to create reliefs. Made from vegetable glues, Wood Mastic Fast Bi is non toxic and completely environmentally safe.