NPT® 100004 Qt 1 qt Oceancare High Performance Penetrating Sealer/Hybrid. Through the discovery of a revolutionary water/solvent blending process, high performance penetrating sealer offers the convenience and safety of a water based formula combined with the ease of use and performance of a solvent-based formula. Hybrid Carrier Technology™ is an evolutionary leap in sealer development. Penetrates and protects grout, natural stone and other porous masonry materials. Forms an invisible, no-sheen barrier that is resistant to water and oil and provides superior stain protection. Low residue formula is specifically designed to be easier and faster to apply than traditional penetrating sealers. May be applied to dry, damp, cured or uncured grout or natural stone (seriously…immediately after grouting!).