Tenax Quartz Toner Stone Color EnhancerTenax Quartz Toner is a surface treatment that can be used to enhance Quartz, Engineered, and agglomerate stones. Both for indoor and outdoor applications. Perfect for bringing out a deep rich color in quartz and engineered stone. Works excellent for matching the edge of the stone with the surface polish. May be applied on polished, flamed, rough, sanded, honed, and brushed finishes. Works well to disguise small scratches. Quartz Toner is also suitable to protect surfaces against oil and water. The product does not change color when exposed to the sun. Quartz Toner works as both a stone color enhancer AND a premium-grade high-quality sealer. Excellent for countertops because it is approved for food contact in compliance with the European rule 90/128 ECC.1 Liter covers approximately 215-300 sq feet  Directions: Apply product to a completely clean and dry surface. Spread the product using a brush, cloth, sponge, or spray gun. Apply as much product as the material can absorb. After a few seconds clean (buff) the surface with a cloth to avoid the formation of glossy and sticky films. Repeat after 10-15 minutes. If using on the floor do not walk on the surface for 24 hours.Important: Test the product on a small, hidden area before use.Shelf Life: This product will last at least 2 years if kept between 65° and 77°. Keep away from heat, humidity, and sunlight.