Original Black Formula

New Clear Version

Light, "Brite" Color

Product Information

Quick Features:

Easy to use, portable, aerosol spray

Shoots a thick, black liquid

Seeps into cracks and holes

Dries to a watertight, flexible, rubberized coating.

Seals out water, lasts for years

Stays flexible and pliable

Will not sag or drip in summer heat

Will not crack or peel in winter cold

Stops vibrations, deadens noise and sound

Protects surface from corrosion

Can be applied on wet or dry surfaces

Once dry, can be painted any color



FLEX SEAL® is a portable, easy to use spray that coats, seals and protects just about everything. FLEX SEAL® shoots out a thick, rubberized liquid, seeps into cracks and holes and dries to a watertight, flexible, rubberized coating. Once dry, FLEX SEAL® can be painted any color. FLEX SEAL® is easy to carry, easy to apply and eliminates messy clean-up or heavy pails. FLEX SEAL® stays flexible and will not sag, drip, crack or peel. FLEX SEAL® seals out the elements and protects the surface from corrosion. FLEX SEAL® is excellent for: Roof Leaks, Gutters, RV’S, Campers, Mobile Home Roofs, Skylights, Vent Pipes, Flashings, Hoses, PVC Pipes, Windowsills, A/C Drip Pans, Portable A/C Units, Duct Work, Chimneys, Boats, Bird Baths, Ponds, Fountains, Downspouts, Flat Roofs, Metal Roofs, Foundations, Gravel Stops, Asphalt Shingles, Overlapped Seams, Drip Edges, rubberized and granulated roofs and so much more! FLEX SEAL® helps seal foundations and basements from water seepage and hydrostatic pressure and effective even when the surface is wet.




SHAKE WELL. Shake well and spray on a clean dry surface using a sweeping motion from a distance of 12 to 14 inches. For best results, apply several coats rather than one thick coat and use at can-temperatures above 60°F. Spray a larger area than where leak has occurred and feather edges. NOTE: After each use, invert can and apply a short burst to clear nozzle.




One Large can treats 2 to 8 square feet depending on coating thickness.

One Jumbo can treats 2 to 12 square feet depending on coating thickness

OFFER DETAILS: Order one large can of Flex Seal®, Flex Seal® Brite, or Flex Seal® Clear today for only $19.99 plus $9.95 S&H and get a 2nd large can for FREE, *just pay separate $9.99 processing. You'll receive all this for just $39.93.

You'll receive all this for just $39.93.

Patent Pending for uses.

Orders from Continental U.S. only.

100% Satisfaction Guaranteed.

Please allow 2-4 weeks for delivery.

FL, SC and CA residents add sales tax to your total order.

Flex Seal® is not affiliated with GAF and is not intended for use by Professional Roofers.

To apply Flex Seal®, shake and spray from 12 to 14 inches away in a simple motion. Spray the affected area larger than the leak for complete coverage. Dry time depends on temperature, however it will usually dry within 2 to 3 hours at touch and complete cure in 24 hours. Flex Seal® gets stronger over time to make it last.