Rust-oleum 351237 Wet Roof Leak Stop Cement Patch

Product Description

The RUST-OLEUM 351237 is a fibered, asphalt-based roofing cement designed to seal active leaks and repair common roofing defects including blisters, cracks, and punctures. This gallon-sized, black-colored compound works in wet or dry conditions, making it suitable for application directly to standing water surfaces. The formula combines penetrating oils and plasticizing agents to deliver a sag-resistant consistency that remains workable in cold weather. Its flexibility after cure helps accommodate normal roofing movement without cracking. Licensed roofing contractors and experienced tradespeople are the typical installers, though the product is also appropriate for knowledgeable service professionals handling repair calls.

This roofing cement is suited for use on both commercial roofing systems and shingled residential roofing systems. It can be applied to cold, hot, wet, dry, or submerged surfaces, giving it broad utility across repair scenarios. Common applications include patching flashing transitions, sealing around penetrations, repairing field membrane blisters, and addressing punctures on low-slope or steep-slope roofs. The ability to apply in wet conditions is particularly useful for emergency leak repairs where drying the surface first is not practical.

Key Features

• Seals leaks in standing water without requiring a dry surface
• Fibered asphalt formula resists sagging after application
• Penetrating oils and plasticizing agents maintain long-term flexibility
• Spreads easily in cold weather conditions
• Repairs blisters, cracks, and punctures in a single application
• Compatible with commercial roofing membranes and residential shingled systems

Compatibility

Designed for use with commercial roofing systems and shingled residential roofing systems, as stated by the manufacturer. Suitable for application to cold, hot, wet, dry, or underwater surfaces.

Installation Notes

This product is typically installed by licensed roofing contractors or qualified maintenance professionals. Before applying in non-emergency situations, remove loose debris and ensure the area is structurally sound. Apply using a trowel or putty knife to the repair area, feathering edges for adhesion. Follow all applicable local building codes and roofing system manufacturer guidelines when making repairs.

Technical Specifications

• Container Size: 1 gallon
• Color: Black
• Base Material: Fibered asphalt
• Application Conditions: Wet or dry, cold or hot surfaces, including standing water
• Package Weight: 18 pounds
• Unit of Measure: Each
• Package Quantity: 2 per package

Standard Information

• Brand: RUST-OLEUM
• Manufacturer Part Number: 351237