Designed to accept up to 6 oz of colorant per gallon to tone the surface towards the finish color and increase hiding power of the topcoat. Improves the coverage of dark color topcoats. Seals and tones the surface. Use over or under any paint. Covers approximately 450 sq. ft. per gallon on smooth, painted, non-porous surfaces; 350 sq. ft. per gallon on rough, unpainted, porous surfaces.