Dulux Avista Sealer 2 Pack Urethane is a two part high gloss clear concrete sealer that will provide a hardwearing non-yellowing coating for both interior and exterior concrete surfaces.The Dulux Avista Urethane Sealer can be used over stamped and stencil concrete, resurfacing systems, coloured and plain concrete and exposed aggregate, flake flooring and can be applied to most concrete surfaces including polished or ground concrete/ polished concrete bench tops. It has very good solvent and chemical resistance.