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 excape. 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. 6 oz Bottle. Miracle Sealants