Concrete Sealer Sat GlMfr #: 604001 Excellent for binding chalky surfaces on painted or bare vertical substrates including concrete blocks, tilt ups, stucco and aluminum siding 5 Gal. container waterproofs up to 1,500 sq. ft. Apply 2 coats of heavy duty water proofer 10 days after new stucco has been placed to effectively lower surface pH, paint when dry, paint up to 3 weeks faster Can be applied to colored stucco during the curing process to reduce bleeding and