General Information — Flexible SealMighty Seal

General Information - Flexible SealMighty Seal

General Information

Will Flexible Seal discolor my copper rain gutters and flashing?

Flexible Seal will not discolor copper rain gutters or flashings.

How do I apply Flexible Seal in the cartridge?

1. You will need a standard caulking gun capable of holding a 10.6 oz. (the most common size). When buying a caulking gun ask your dealer for one that has a nozzle cutter and also has a long wire built into the caulking gun.  The wire is for puncturing the inner seal of the Flexible Seal cartridge.

2. Properly clean the surface of the roofing/material that you will apply Flexible Seal. This can be done by hosing off the area and allowing it to fully dry before applying Flexible Seal, or sweeping the area clean of dirt, dust and debris.

3. The nozzle should be cut off (at a 45 º angle works best) to the desired angle and width of bead desired. A bead of 1/8” to ¼” should be applied, depending on the application need.

4. Puncture the seal at the base of the nozzle (by inserting the long wire from the caulking gun into the center of the cut nozzle).

5. Insert Flexible Seal cartridge into the caulking gun.

6. For best results when gunning the material out of the cartridge, work with the cartridge by pulling the cartridge towards you. This method will enable you to get the material into the correct area. Do not make the mistake of “pushing” the cartridge bead away from you. This is incorrect and may end up pulling the material out of the desired repair area.

7. To smooth or level (often referred to as “tooling”) the bead of Flexible Seal, use 5 drops of liquid dish washing soap (any brand will do) in a glass of water and stir it. Using the soapy solution on the tip of your finger with a light touch, smooth or shape the bead into any shape or profile wanted. Mineral spirits may also be used in this manner.

8. Clean up — Work tools may be cleaned with mineral spirits or MEK. Citrus-based hand cleaners can be helpful in cleaning your hands.

For Applying Flexible Seal Brush Grade

Clean and prepare the area prior to applying Brush Grade Flexible Seal. Flexible Seal can be applied by stiff brush, short nap roller, trowel, putty knife or squeegee. Be sure to apply enough material to seal the desired area about 1/8” to ¼” thick and overlap the repair area by about 1”- 2”around the repaired area for a good seal. Mineral spirits or “soapy water” for “tooling” the material can also be used.  It’s best to use an inexpensive brush or roller since thay can’t be cleaned and should be thrown away after using.

Can Flexible Seal be applied over a silicone product?

No, Flexible Seal will not adhere to Silicone. All of the old silicone material will have to be removed and the area cleaned with a “silicone remover” prior to application of Flexible Seal.

How do I repair a roofing seam that has cracked?

Prepare the surface either by sweeping all the loose dirt and debris off the area to be repaired or hose the area down and allow it to thoroughly dry. Larger cracks, holes and dissimilar flashings, roof seams and tears may be bridged by embedding a single layer of polyester mesh in the Flexible Seal. For a longer lasting repair, two (2) separate applications of polyester mesh embedded in Flexible Seal (allowing 24 hours in between applications) may be applied.


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