Lucas #1000M Elastomeric Base Coating is a 100% acrylic elastomeric roof coating intended for application to metal roofs. A high degree of rubber-like elasticity allows this product to accommodate wide swings in temperature and significant building movement. This product must be top-coated with Lucas #1000TC. Lucas #1000M is formulated from 100% acrylic polymers. This is a water-based material and must be kept from freezing.