Leak Stopper 1 Gallon Black Rubberized Roof Patch is a revolutionary roof patching and repair advancement.  This long-lasting rubberized repair is specially formulated to penetrate damaged areas and instantly stop roof leaks!  The secret is Penetrex, a unique penetrating oil that reaches deep into the crack and forms a complete seal.  With the addition of liquid rubber, this flexible, high-performance plastic cement provides a superior watertight bond that will stop problem leaks for good.  Product formulated to be used year-round.  Leak Stopper® Rubberized Roof Patch is ideal for various roof surfaces including Shingles, Built-Up Roofs, SBS Modified Roofs, Metal Roofs, and many other surfaces.  It is highly recommended to reinforce the repair with a strip of Universal Patching Fabric.  Work material to an even consistency over and into the area to be repaired approximately 1/8” to 1/2” thick, two or three inches beyond the problem area.  Embed fabric into the cement and cover with a second layer of cement.  Form a feathered edge with cement where chimney’s, vent pipes, and other projections meet the roof line.  DO NOT EXPOSE DIRECT HEAT/FLAMES OR THIN.  Best used when surface temperatures are between 50° and 120 F.  In colder weather (50° and below), product should be stored in heated room (70° to 80°F. ) at least 24 hours before application to promote ease of application.  Product formulated to be used year-round.  VOC <250 g/L. 
REVOLUTIONARY ROOF PATCH: A major advancement in roof patching and repair, Gardner-Gibson Leak Stopper Roof Patch penetrates deep to help you stop leaks instantly. 
SUPERIOR FORMULATION: Featuring Penetrex, a unique penetrating oil, and liquid rubber, this roofing patch reaches deep into cracks to form a complete, watertight seal. 
LONG-LASTING REPAIR: This rubberized roof patch is resistant to cracking and lasts 2-3 times longer than other roof cements.  It's an ideal choice for shingles, built-up roofs, SBS modified roofs, metal roofs and more. 
EASY TO APPLY: Use a trowel to spread Leak Stopper across the damaged surface.  Embed reinforcing fabric after first layer and apply second layer on top of fabric.  Follow all directions on label for application. 
VOC: <250 g/L