What kind of mold release agents are used on rubber form liners?
If the surface is moistened with water immediately before the concrete is placed it is not usually necessary to use a mold release agent. Some contractors prefer to apply a slurry of cement and water mixed to a creamy consistency on the matting just before the concrete is placed in order to minimize the number of air voids that may be produced at the surface. Some contractors do use a lightweight oil applied as a thin film over the rubber.