Product Description Natural look penetrating sealer - 6 ounce. Bottle with applicator water & stain protection for: All sanded and unsanded cementitious grout joints. Grout sealer is a sealer designed for the protection of all sanded and non-sanded grout joints. Grout sealer foRMS an invisible barrier that is resistant to moisture and stains while allowing vapor to escape. Grout sealer is not a surface coating and will not alter the natural look. Grout sealer comes with a unique applicator tip for easy application. From the Manufacturer Grout Sealer is a sealer designed for the protection of all sanded and non-sanded grout joints. Grout Sealer forms an invisible barrier that is resistant to moisture and stains while allowing vapor to escape. Grout Sealer is not a surface coating and will not alter the natural look. Grout Sealer comes with a unique applicator tip for easy application.