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Roof & Foundation Products

Rubberized SBS Premium Roof Cement
• Stops Roof Leaks Instantly
• Use on Wet or Dry Surfaces

• Added Flexibility & Elasticity
• Superior Flashing & Patching Cement
• Provides Long Lasting Protection

Sizes Available: 2.85 Gallon Pail, .9 Gallon Pail, 29 Oz. Tube, 10 Oz. Tube
Coverage: Approximately 12 square feet at 1/8" thick per gallon.

SDS Sheet (pdf) Tech Data Sheet pdf icon (pdf)

A high performance, professional grade flashing and repair product that cures to a long lasting rubber-like film. This product remains flexible through extreme temperature ranges. Its exceptional adhesion makes this an ideal cement for vertical or horizontal construction and repair of all flashings, metal joints, seams, coping, vent pipes, skylights, chimneys, breaks in roofing, bonded roof shingles, foundations, parapet walls, gutters, concrete, & SBS roof systems. This product is ideally suited for sealing cracks, holes, and tears in built-up roofs and modified bitumen single plys.

Sealing & Leak Repair on Vertical & Horizontal Surfaces on Shingles,
SBS Roof Systems, Built-Up Roofs, & Modified Bitumen Single Plys.

Clean Surface - All surfaces to be treated must be free from oil, grease and other foreign materials prior to application.

Applying Roof Coating - The surface must be firm and free from loose material. On composition roofs, open any breaks or blisters to be patched and permit to dry out before applying this product. Allow at least 24 hours to dry (32 ºF or higher and less than 50% humidity with no rain) before applying a surface coating.

Roof Cement - Using a trowel, spread Roof Cement onto the surface at a thickness of about 1/8”, making sure to smooth down the edges. Mend cracks, splits or blisters by troweling the cement to the affected area and three inches beyond. Embed SealBest Reinforcing Fabric into the repaired area and topcoat with another layer of roof patch material.

Rolled Roofing - Apply Roof Cement with a roofer’s brush or a masonry trowel in a uniform consistency. Apply a sufficient amount of adhesive to cover the entire underside of the membrane and to allow a 1/8” - 1/4” bead of adhesive to form along the lap seam when membrane is pressed into place. Broom or walk the overlying sheet firmly into the cement and smooth it out to prevent buckles or blisters. Do not apply if rain is imminent within 24 hours of application.


All-Weather Roof Cement

Roof Instructions

Item Number Unit Size Unit Weight Pack Pack Weight
H3427 2.85 Gallon Pail - lbs. 1 - lbs.
H3420 .9 Gallon Pail 9.2 lbs. 6 55.5 lbs.
H9031 10 Oz. Tube .75 lbs. 12 9 lbs.
H9100 29 Oz Tube 2.2 lbs. 12 26.5 lbs.

Tools Needed:

scrub brush paint brush roller                

You May Also Need:

Asphalt Coated Reinforcing Fabric



2520 South Campbell Street •  Sandusky, Ohio 44870 • Phone: 1-800-326-1994 • (419) 626-4375
Fax: (419) 626-5477 • E-mail: info@sealbest.com

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