Essential Slate Sealer Colour Boost is an elevated stone sealer designed specifically for natural slate surfaces. It is also suitable for other porous natural stones such as sandstone and limestone. Our powerful yet environmentally friendly sealer offers superior stain protection, while the Colour Boost formula delicately enhances natural colours and appearance. It can also be used on both external and internal surfaces. The amount of coverage will vary depending on the type of surface application, but it should be up to 15m2/litre per coat. Available in 5L and 25L. HOW TO APPLY: 1. Remove any loose debris from the work surface before beginning your work, and make sure you have adequate personal protection, such as gloves , proper protective eyewear , a face mask , and appropriate clothing. 2. Before applying the product, make sure the surface is completely clean and dry. Similarly, make certain that the weather conditions are favourable before beginning. 3. Apply the first coat of Essential Slate Sealer Colour Boost with a low-pressure sprayer , roller , natural fibre brush, or sponge . Do not, under any circumstances, dilute the product! 4. After 20 to 30 minutes, remove any excess sealer from the slate surface. 5. For best results, a second application should be applied 45 to 60 minutes later. 6. Above all, the stone surface must be kept entirely dry during the curing process, this can take up to 72 hours. If not, unappealing white patches may appear as a result of the sealer drying inconsistently. PLEASE NOTE: When this product is applied, the colour and/or appearance of the stone will change. As a result, always test the product in an inconspicuous area before using it. Masking tape can be used to protect any surfaces that are not to be sealed.