Dense-Crete is a water based modified silicate sealer developed to penetrate deep into concrete and react with free calcium and lime to provide a hardened densified surface, increasing the life of concrete. Reduces the porosity and permeability of concrete, minimises the occurrence of efflorescence and reduces dust, moss, mould and algae. Resistant to chemicals, solvents, acid and alkali. Dense-Crete will last up to 10 years or longer dependant on application and weather conditions.