Create stain-resistant coating for natural slate surfaces with the StoneCare4U Essential Matt Finish Slate Sealer 5L 3 Pack. This quick-drying formula is a high-performance stone sealer formulated especially for external natural slate surfaces. Also suitable for other porous natural stones such as sandstone and limestone. It provides excellent water repellence and long-lasting protection. Once sealed, the attractive matt finish helps to prevent efflorescence, green growth and algae growth and creates a self-cleaning surface tension that reduces the need for regular maintenance. How to apply: Before use, remove any loose debris from the work surface and ensure adequate safety wear, i.e. gloves, suitable protective eyewear, face mask and clothing. Leave the surface for a minimum of 72 hours with clear and dry weather to ensure the surface is completely dry and ready to be sealed. Application temperature range: 13 degrees to 23 degrees Celsius. Before application, the surface must be completely clean and dry. Application methods include a low-pressure sprayer, roller, natural fibre brush or sponge. Apply Essential Slate Sealer Matt (dry) Finish, to saturation, two coats “wet on wet” are needed to ensure complete coverage. Do not dilute. Surface dry after 45 to 60 minutes. If rain is forecast or starts, then stop treatment immediately and cover the freshly impregnated areas, the surface is required to stay completely dry for the first 6 hours after application. Please note: This matt dry finish may cause a change of colour on some surfaces – always try the product in an inconspicuous area prior to use. Surfaces that are not to be sealed should be protected with masking material. Not recommended for use on highly polished, ceramic, glazed dense or non-porous surfaces. Clean sealed areas with a mild, pH-neutral cleaner or a very low concentration of our outdoor cleaner range. Do not use harsh or abrasive cleaning agents as this can have a negative effect on the treated surface. Coverage: Apply the Essential Slate Sealer Matt (dry) Finish undiluted, up to 15m2 per litre per coat. Coverage will vary depending on the type of surface application.