Natural Stone Sealer with a 'DRY' Invisible Finish Effective impregnating sealer for sandstone, limestone, granite and slate Smartseal Indian Sandstone Sealer and Natural Stone Sealer is a high quality, clear, solvent free acrylic impregnating, breathable coating system. Application of the sealer will alter the chemical structure of the porous sandstone or natural stone providing a excellent water repellent and stain resistant surface. One coat application to saturation, or for best results, apply a second coat once 'touch dry' Resistant to algae, lichen and staining Dry finish Average coverage: 1st coat 4 - 8 m² per litre ( 4m2 Sandstone- 8m2 Slate & Granite) 2nd coat 8 - 16 m² per litre (dependant on porosity and finish of the surface) Application by roller or sprayer Touch dry 2 - 3 hours Fully waterproof 24 hours Suitable for Sandstone, Limestone, Terracotta, Travertine, Slate and Granite Can be used externally or internally TECHNICAL PREPARATION: Pre treat surface with