- Product Type:Elastomeric Coating, Waterborne Coating, 1K (1 component) Coating
- Features:Rapid Drying Properties, Mercury Free, Excellent Substrate Adhesion, High Air Permeability, Resilient, Good Weather Stability, High Solids Content
- Compatible Substrates & Surfaces:Steel, Iron, Metal, Fiberglass
- Application Method:Trowel
L&L 300 RCM Mastic is a high-solids, waterborne, elastomeric coating. Its high permeability coupled with optimum brightness greatly reduces the occurrence of polyurethane foam blisters (delamination) which frequently develop when existing polyurethane foam has been compromised by water intrusion, then re-coated. L&L 300 RCM Mastic is engineered to allow entrapped moisture vapor to escape through its membrane. Its bright white reflective surface reduces surface temperature, and in turn, minimizes vapor drive. While L&L 300 RCM Mastic has many other uses, it was designed specifically for re-coating existing polyurethane roof decks.