SMARTCOAT™ 301 Fibered Acrylic Mastic is a 100% acrylic elastomeric, water-based, fiber-fortified roof mastic intended to seal leaking seams, fasteners, penetrations and/or any splits, tears or deficiencies in the roof’s surface prior to coating with SMARTCOAT 400/401 Acrylic Coatings. This product is suitable for application to metal, asphalt, modified bitumen, concrete and most single-ply roofs. While maintaining a high degree of elasticity, the addition of reinforcing fibers reinforces strength and delivers superior crack-bridging performance. SMARTCOAT 301 Mastic is UV-stable; coating is not required. SMARTCOAT roof restoration products numbers align with proper application sequence. • 100 Series: Clean • 200 Series: Prime/prepare surfaces only as needed • 300 Series: Seal • 400 Series: Coat Why tear off when you can restore? Restoring a roof and avoiding tear off labor can reduce project costs up to 40%. And since coatings are classified as a maintenance, there are...See More tax advantages for building owners as well. Plus, the energy-cost savings of a bright-white, reflective roof. Seamless. Sustainable. SMARTCOAT. Reach out to your local CertainTeed Territory Manager to request a sample of SMARTCOAT ™ 301 Fibered Acrylic Mastic and training on the SMARTCOAT Liquid-Applied Roof Restoration system. See Less