When unexpected leaks and roof damage occur, and conditions are damp or wet, you need a reliable solution that works immediately. Roof-Master 220 All-Weather Flashing Cement from United Asphalt is a unique, high-quality flashing cement specifically formulated for emergency roof repairs in challenging weather conditions. This product is manufactured using the highest quality chemical ingredients available, resulting in a flexible, smooth, and trowelable consistency that makes it easy to apply for patching emergency holes and cracks.

A key distinguishing feature of Roof-Master 220 is its all-weather capability. It is specifically formulated for use in damp, wet roofing situations and is ideal for sealing emergency leaks on both wet and dry roof surfaces. Furthermore, it boasts excellent underwater adhesion, making it a go-to product for contractors facing tough conditions.

Roof-Master 220 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 areas around 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, while challenging in emergency wet conditions, still 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 220 All Weather 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 performance in both standard and wet conditions. 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 220 All-Weather Flashing Cement from A1A Wholesale Supply for a reliable, high-quality, all-weather emergency roof repair solution nationwide.

• Product Name: Roof-Master 220 All-Weather Flashing Cement
• Brand: United Asphalt
• Type: All-Weather Flashing Cement, Emergency Roof Patch, Wet/Dry Surface Cement, Underwater Adhesive, Trowel Grade Cement, Roofing Cement, Asphalt Cement, Waterproofing Repair Material
• Consistency: Flexible, smooth, trowel consistency
• Key Properties: All-Weather (works on wet and dry surfaces), Excellent Underwater Adhesion, High-Quality, Flexible, Smooth, Trowelable, Emergency Repair, Ideal for Patching, Ideal for 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, skylights, 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, flexible, trowelable asphalt cement for emergency repairs and sealing of various roof components in all weather conditions, including wet and underwater.