A Staple of Roof Repair
High-Quality, Great on Flat & Vertical Surfaces, All-Purpose Repair Cement
Del-Val 211 Flashing Cement is a high-quality cement that is formulated to a heavy smooth trowel consistency. This product is used as a cold applied flashing cement in many types of asphalt roof membranes. Del-Val 211 Flashing Cement is ideal for flashing details and a variety of waterproofing repairs such as roof penetrations and moving joints.
High-quality cement ideal for flashing details and a variety of waterproofing repairs such as roof penetrations and moving joints.
Quick Application Guide
Min Mil Thickness
Apply with Trowel
Embed with Fabric
Per Square (Per Coat)
Specially formulated for vertical surfaces. This product is primary used for repairing flashings, asphalt shingles, built-up roofs, metal and masonry surfaces. Great for sealing leaks and openings at flashings (chimneys, vents, skylights, metal joints, gutters). Damp-proofing of concrete, masonry walls and foundations. DO NOT USE with EPDM, PVC, TPO or other single-ply membranes.
Surface must be clean and free of dirt, dust, oil or grease and be free of any other foreign matter that would interfere with good adhesion. In colder climates we recommend storing the product at room temperature for 24 hours prior to application.
Apply with a trowel or putty knife. Spread Del-Val 211 Flashing Cement to approximately 1/8″ thickness and work thoroughly into the problem area. Repairing cracks and blisters: if the area is 1/4″ wide to 2″ long, apply United Asphalt Cotton or Fiberglass Fabric for reinforcement then cover with additional cement.
Approximately 8 gallons per sq (per coat)
Cleanup Del-Val 211 Flashing Cement
Clean tools with Del-Val Orange Cleaner & Degreaser or mineral spirits, taking necessary precautions when handling combustible liquids.
Code Approvals / Compliance
This product meets or exceeds the requirements of ASTM 4586 Type I
Frequently Asked Questions (FAQ)
What is the coverage rate?
The basic guidance for coverage is about 8 gallons per square (per coat). More specifically, we recommend spreading Del-Val 211 Flashing Cement to approximately 1/8" thickness and to work thoroughly into the problem area. Repairing cracks and blisters: if the area is 1/4” wide to 2” long, apply United Asphalt Cotton or Fiberglass Fabric for reinforcement then cover with additional cement. To make it easier to determine how much you will need for your job, we've put together a calculator tool.
What is the lowest temperature I can apply Del-Val 211 Flashing Cement?
The lowest temperature Del-Val 211 should be applied is 40°F.
Our roof cements are modified in production to semi, winter & summer grades to make them most workable in their respective temperature & climate zones. If you require a specific grade, be sure to request it when you place your order with your distributor.
How Much Will You Need?*
With an Estimate of How Much You May Need, Buy it Locally…
*This calculator is provided as a guide. Do to variables of each project, we can not guarantee the calculated result is what will actually be needed for your specific project.
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