In response to installer requests, MAPEI has introduced Mapelastic CI, a pre-mixed liquid-rubber crack-isolation membrane for installation under ceramic tile or stone. This quick-drying product can be used in interior and exterior environments on residential or commercial projects. Mapelastic CI meets ANSI A118.12 requirements, preventing in-plane floor cracks up to 1/8 inch (3 mm) from transmitting through the tile or stone.