When the most challenging emergency roof repairs arise, particularly in damp or wet conditions, Roof-Master Plus 221 Ultimate Rubberized Flashing Cement from United Asphalt provides an ultimate, high-performance solution. This is a high grade SBS rubberized flashing cement, manufactured using the highest quality chemical ingredients to deliver exceptional results. Unlike standard cements, Roof-Master Plus 221 is initially soft and pliable, making it incredibly easy to apply and work into intricate details and problem areas. It then gradually hardens to form a compound that is highly elastic, durable, and resistant to water, providing a long-lasting seal.
Inheriting the core strength of the Roof-Master line, Roof-Master Plus 221 is ideal for sealing emergency leaks on both wet and dry roof surfaces and boasts excellent underwater adhesion, making it a reliable choice in virtually any weather. It serves as a heavy duty flashing cement for repairing flashings, asphalt shingles, built-up roofs (BUR), metal, and masonry surfaces. It’s great for sealing leaks and openings at critical flashing components like chimneys, vents, skylights, metal joints, and gutters. Important: This product is NOT suitable for use with EPDM, PVC, TPO, or other single-ply membranes.
Proper preparation, even in emergency wet conditions, requires the surface to be as clean as possible, free of dirt, dust, oil or grease, and any other foreign matter that would interfere with good adhesion. In colder climates, storing the product at room temperature for 24 hours prior to application is recommended. Apply Roof-Master Plus 221 Ultimate Rubberized Flashing Cement with a trowel or putty knife. Spread the cement to approximately 1/8” thickness and work thoroughly into the problem area. For repairing cracks and blisters that are 1/4” wide to 2” long, apply United Asphalt Cotton or Fiberglass Fabric for reinforcement, then cover with additional cement. Apply at a rate of approximately 8 gallons per square (100 sq ft) per coat, though coverage may vary. Clean tools with Del-Val Orange Cleaner & Degreaser or mineral spirits.
This product meets or exceeds the requirements of ASTM 4586 Type I (Standard Specification for Asphalt Plastic Cement) and ASTM D-3409 (Standard Test Method for Adhesion of Asphalt Roof Cement to Dry and Wet Surfaces), confirming its quality and performance, particularly its wet adhesion capabilities. It also has a Low V.O.C. content of less than 300 g/L. Important precautions include: DO NOT THIN, DO NOT HEAT CONTAINER, and DO NOT store in an area where temperatures exceed 120°F. Choose Roof-Master Plus 221 Ultimate Rubberized Flashing Cement from A1A Wholesale Supply for the ultimate, highly elastic, all-weather emergency roof repair solution nationwide.
- Product Name: Roof-Master Plus 221 Ultimate Rubberized Flashing Cement
- Brand: United Asphalt
- Type: Ultimate Rubberized Flashing Cement, SBS Rubberized Flashing Cement, Elastic Flashing Cement, All-Weather Flashing Cement, Emergency Roof Patch, Wet/Dry Surface Cement, Underwater Adhesive, Trowel Grade Cement, Roofing Cement, Asphalt Cement, Waterproofing Repair Material
- Consistency: Soft, pliable cement that gradually hardens to an elastic, durable, water resistant compound. Trowel consistency.
- Key Properties: Ultimate Rubberized, High Grade SBS Rubberized, Soft, Pliable, Gradually Hardens, Elastic, Durable, Water Resistant Compound, All-Weather (works on wet and dry surfaces), Excellent Underwater Adhesion, High-Quality, Flexible, Smooth, Trowelable, Emergency Repair, Ideal for Patching/Sealing Leaks, Low VOC (< 300 g/L).
- Uses/Compatible Substrates: Patching emergency holes and cracks; Sealing emergency leaks on wet and dry roof surfaces; Heavy duty flashing cement for repairing flashings, asphalt shingles, built-up roofs (BUR), metal, and masonry surfaces; Sealing leaks and openings at flashings (chimneys, vents, skyllights, metal joints, gutters); Specifically formulated for use in damp, wet roofing situations.
- Incompatible Substrates: EPDM, PVC, TPO or other single-ply membranes.
- Preparation: Surface must be clean (dirt, dust, oil, grease, foreign matter free); store at room temp (colder climates).
- Application: Apply with trowel or putty knife; spread to approx. 1/8″ thickness; work thoroughly into problem area; use United Asphalt Cotton or Fiberglass Fabric reinforcement for cracks/blisters (1/4″-2″ wide/long).
- Coverage: Approximately 8 gallons per square (100 sq ft) per coat (Coverage may vary).
- Cleanup: Del-Val Orange Cleaner & Degreaser or mineral spirits.
- Code Approvals / Compliance: Meets or exceeds ASTM 4586 Type I & ASTM D-3409.
- VOC: Less than 300 g/L.
- Limitations/Precautions: DO NOT THIN, DO NOT HEAT CONTAINER, DO NOT store > 120°F; DO NOT USE with single-ply membranes.
- Function: Provides a high-quality, highly elastic, trowelable, cold-applied SBS rubberized asphalt cement that is soft and pliable during application, gradually hardening to a durable, water-resistant compound for ultimate emergency repairs and sealing in all weather conditions, including wet and underwater.
