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ChimneySaver Flash Seal


  • $71.99

FlashSealTM Elastomeric Flashing Sealant


FlashSeal is an elastomeric sealant specially formulated for permanent adhesion to asphalt shingles, aluminum flashing, brick, and other chimney and roofing materials.


FlashSeal is excellent for use in stopping problem leaks around the base of chimneys, stacks, and vents. It is also great for sealing around skylights. Repairing flashings that have been tarred, retarred, cracked, or just plain funky has never been so easy.


  • Stays flexible
  • 7 year warranty
  • Available in black, brown, and white
  •  Easy brush-on application


Preparation: Clean surfaces to which product will be applied with stiff brush to remove any dust, dirt, or debris. Measure and cut enough reinforcement fabric to completely cover the repair. Work the lowest side of the chimney or vent first, overlapping reinforcement fabric as you would shingles. Note: White FlashSeal can be colored using any standard mortar dye. To color, remove all the FlashSeal you will need for the job to another container and add mortar dye one drop at a time, mixing until desired color is reached.


Stir product well. Apply approximately 1/8” of coating to the surface to be sealed. Make sure product fills all cracks and holes entirely and extends about one inch beyond the edges of the pre-cut fabric. Using a brush, embed the pre-cut fabric into the first coat of FlashSeal. The FlashSeal should extend beyond the edges of the fabric and fill the holes in the fabric. Apply a liberal topcoat of FlashSeal making sure to completely cover the fabric and extend beyond the problem area about one inch. Note: On hot days FlashSeal will dry quickly. Work in 2-3 ft. sections. Use of duct tape will produce clean edges and enhance the appearance of the repair. See step-bystep photo instructions on the web at: FlashSeal. Coverage: 1 gallon of FlashSeal covers approximately 28 linear feet. Clean-Up: Soap and water while product is still wet. Note: Do not use in cold, damp rainy weather or product may wash away. Allow at least 12 hours of dry, clear weather for proper curing. Apply at temperatures above 45° F.


Keep away from children. Respiratory protection is not generally required during normal use and handling. The use of protective gloves and chemical splash goggles is recommended. Wash thoroughly after handling. Close container after each use. Use protective clothing to avoid contact with skin and eyes. First Aid: External: Wash skin with soap and water. Eye contact: Immediately flush with clean water for fifteen minutes. Consult a physician. For additional information, consult the Material Safety Data Sheet for this product.


SaverSystems warrants that FlashSeal, when used with reinforcement fabric, will remain intact and in place for 7 years from the date of application, when properly applied to a residential flashing of a chimney, stack or vent system according to label instructions. This warranty does not cover spalling, abrading, faulty construction and/or other defects which might erode coated surfaces. If FlashSeal fails to perform as specified, SaverSystems will furnish, without charge, enough FlashSeal to correct the condition as your sole remedy. This warranty does not include labor or cost of labor for the application of FlashSeal. SaverSystems shall not be liable for direct or incidental or consequential damages resulting from any breach of this warranty and fitness for use. Some states do not allow the exclusion of incidental or consequential damages, so the above exclusions may not apply to you. This warranty gives you specific legal rights. You may also have other rights which vary from state to state.


FlashSeal is available in one gallon plastic containers.


FlashSeal is not considered a hazardous material or substance under U.S. Department of Transportation (DOT) regulations. Store FlashSeal in a cool, dry place inaccessible to children and animals. Do Not Freeze.

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