The Ibstock Brick Calderstone Claret is a red multi textured perforated wirecut brick; fully durable with low soluble salts. This is a high strength brick with low water absorption, ideal for most masonry applications. This brick is made from clay which have a high thermal mass and low conductivity and when incorporated into a building it gives it an acoustic insulation. Clay bricks have a long service life, are reusable after use and are highly durable and strong for many builds. Durable and can be used in most masonry situations.