-and-Cement-based foundation Plaster, with high mechanical resistance, for interiors and exteriors Use KR 100 is used as a foundation plaster on Walls made of bricks, concrete blocks, rough concrete etc. whenever high mechanical properties are required for applying exterior ceramic, natural Stone or clinker coverings etc. Supply Special sacks with protection against moisture, approx. 30 kg. (The product packaging will gradually pass from 30 kg sacks to 25 kg sacks).