This sealant is hardwearing durable abrasion resistant clear sealer for both exterior or interior use. This type of sealant seals and protects stone and also concrete. If you enjoy having your friends over then this type of a sealant is a must for you. Unlike water based products, this sealant lasts the lifetime of the stone. Depending on the porosity of the surface coverage is generally 2 square metres per litre using two coats.