Brian McIver, vice-president of Nova Pb, located in Ste. Catherine on the South Shore, said the company worked with the Universite de Sherbrooke to devise a method of adding other materials to the residue to render it non-toxic and create a new product called CALSiFrit.
CALSiFrit strengthens cement and also makes it more porous, he
said, reducing the moisture infiltration that causes deterioration.
The product has gone through three years of development and commercial trials, he
said, and has received the blessing of Quebec's Ministry of the Environment.Tests have indicated "beyond a shadow of a doubt" that nothing toxic leaches from the cement, he