Download PDF CrownCrete U™ 1/4” Slurry Product No. 814 is a 3-part self-leveling, broadcast-applied urethane polymer concrete and slurry flooring product. It is a heavy duty slurry cementitious urethane flooring material designed to be typically applied at ¼” thickness, or in conjunction with specific design requirements. This product is engineered to withstand aggressive chemical attacks, maintain thermal shock resistance, and act as a superior functional floor underlayment.