How to Replace Old Foil Tape


Duct foil tape is commonly used in home heating and cooling systems, and often is used to create a vapor seal. Foil tape binds particularly well to sheet metal. It is not sensitive to temperature and can be used in freezing, normal or high-temperature situations. However, over time, the glue on duct foil tape will harden and lose its elasticity. As a result, you need to remove the old foil tape and replace new one. In this article, we will show you how to remove and replace foil tape. If you want to do it by yourself, then, you must read the following tips.

Firstly, slip the edge of the straight razor under the end of the duct foil tape you want to remove. Slide it under the tape until you lift a tab that is separated from the surface to which it was adhered. Fold the edges of the tab toward the middle to create a triangle.

Then, press down on the duct foil tape that is still adhered to the surface, about an inch away from where you created the tab. Pull up on the tab slowly to remove the tape. If it will not come up with pressure, slide the razor between the duct foil tape and the surface to break the seal, then pull it up and away with the tab.

Next, put on a pair of gloves. Spray industrial-strength cleaner on the surface. And wipe the surface with a sponge to remove any remaining residue. However, residue may not form if the duct foil tape has not been on the surface for more than six months.

Well, after totally removed the old foil tape, you are then going to install new one. Though foil tapes are versatile items that can be used in many industries, its usage is almost the same, so you can also apply the following installation methods to other applications except only for duct.

First of all, measure out the amount of tape you need to seal the joint by pulling directly off the roll and holding the tape against the seam. Foil tape, unlike standard duct tape, has a paper backing that must be removed prior to applying the tape.

Then, tear the measured piece off the roll and peel off about 2 inches of the paper backing at one end. Do not peel off all of the paper backing at once unless you are applying a small piece. Foil tape is extremely tacky and, once connected, will tear before it will release. And it is very easy to tangle a large section of tape without paper backing.

Now, attach the exposed section of tape to the duct seam with one hand while holding the edge of the paper backing with the other. Slowly peal the backing away and apply the tape to the duct seam as you go.

Finally, smooth the tape using the plastic comb provided by the tape supplier. You can also use an old credit card or other piece of soft plastic if a comb was not provided. Be careful do not to use your hands to smooth the tape, as the edges of the foil tape are extremely sharp.