EVERBUILD JETCEM PATCHING PLASTER is a high-strength plaster in powder form which mixes easilywith water to form a creamy lump-free paste that is the ideal choice for most patching repairs. The productdries hard in 1 hour to a smooth finish which can be further sanded if desired. With added PVA powder,this product will not shrink or crack and is strong enough to accept nails or screws.