Concrete Curing Compound Coverage

gallons = ceil(area x coats / coverage x (1 + waste)), coverage about 200 sf/gal but the product label governs. A 2,500 sf slab at one coat and 200 sf/gal takes 13 gal (3 five-gallon pails); a 3,200 sf slab at two coats with 10% overspray takes 36 gal. A rough broom or tined finish, vertical faces, and a second coat all cut the coverage. Apply right after the surface sheen leaves so the membrane seals in the mix water; a dissipating-resin (Type 1-D) or white-pigmented heat-reflecting (Type 2) is chosen per the job. A material-ordering estimate; the product data sheet and the spec govern the rate and type.

gallons_exact = slab_area_sf x coats / coverage_sf_per_gal x (100 + waste_pct)/100; gallons_needed = ceil(gallons_exact); pails_5gal = ceil(gallons_needed / 5).

ASTM C309 (Liquid Membrane-Forming Compounds for Curing Concrete) by name; the coverage rate and compound type come from the product data sheet and the spec.

The coverage arithmetic is public first-principles (area over rate); the coverage rate (~200 sf/gal) and the compound type are on the product label per ASTM C309.

Estimate. AHJ and licensed professional govern.

Field names used by the API: slab_area_sf, coats, coverage_sf_per_gal, gallons_needed, pails_5gal

• Coverage rate ~200 sf/gal typical; the product label governs, and a rough/tined finish or vertical face cuts itASTM C309 / product data sheet
• Timing and type apply after the surface sheen leaves; Type 1-D dissipating or Type 2 white-pigmented per the jobASTM C309