Calsil
— 11/12/2020Found on the shore at Maryport, Cumbria. Calsil – possibly an abbreviation for ‘Calcium Silicate’ Unknown manufacturer. . . . The following are references to brick manufacturers using calcium silicate. Below – 12/03/1931 – West Sussex Gazette – Midhurst Brick Company, Midhurst, Sussex. 37s 6d per 1000. 1966 – Construction News – Related news to…