The Essential Limestone Sealer Colour Boost is a high-performance stone sealer designed specifically for natural limestone surfaces. Also best suited for porous natural stone such as sandstone (with some exceptions) and slate.Essential Limestone Sealer Colour Boost' s powerful, environmentally friendly formula offers superior stain protection while subtly enhancing natural colours and appearance. It can also be used on internal surfaces. The amount of coverage will vary depending on the type of surface application, but it should cover 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. To be more exact, the surface must be completely clean and dry. So, before you begin working, make sure the weather is generally favourable! 3.Use a low-pressure sprayer , roller, natural fibre brush, or sponge to apply the first coat of Essential Limestone Sealer Colour Boost. Don't dilute this product.  Furthermore, after 20 to 30 minutes, any excess sealer should always be fully removed from the surface. 4. To achieve the best results, apply a second coat 45 to 60 minutes later. 5. After application, it is critical that the stone surface stay totally dry during the curing process, which can take up to 72 hours. PLEASE NOTE: Some surfaces may change color/appearance after using Essential Sandstone Sealer Satin Finish; always test the product in an inconspicuous area first. Masking tape should be used to protect surfaces that will not be sealed. Also note that this product is not suitable for Kandla Grey (mid and light grey) sandstone.