Some experts say that resined stones do not need to be sealed since the resin acts as a sealer. |
After sufficient curing the new grout should be sealed with a good penetrating sealer. |
The first time I used a water-based sealer that turned a milky color after 3 months. |
For this reason they are usually mixed with gel or paste products to keep them in contact with the sealer longer. |
One coat of a penetrating sealer can give satisfactory performance, but two coats are generally better. |
For instance, crayon and water stains can bleed through several coats of new paint and should be primed with an alcohol-base stain sealer. |