For filling cracks, holes and minor imperfections in subfloors to form a smooth even surface. Used to patch floors, walls and other surfaces in preparation for a decorative finish. Bonds to drywall, wood, concrete and masonry. Non-shrinking patch sets in20-30 minutes. Can also be used to patch drywall and plaster. Mix four pounds with 20 oz of water. When applied 1/16 in thick covers 12 to 14 sq. ft. and 1/8 in thick covers 5 to 7 sq. ft. Mix twenty-five pounds with 4 Qt of water. When applied 1/16 in thick covers 75 to 80 sq. ft. and 1/8 in thick covers 30 to 45 sq. ft.