StoneTech BulletProof Stone Sealer, 1-Gallon Container Advanced sealer, designed to provide maximum protection on nature stone against the toughest oil and water-based stains Preserves natural look of stone for up to 5 years in interior environments and up to 3 years in exterior environments Formulated with advanced, water based fluoropolymers Provides coverage for up to 900 sq. ft. Recommended surfaces include: honed or textured marble, granite, limestone, travertine, sandstone, saltillo and bluestone