Can you fix a roof with Flex Seal?

Asked By: Belia Jamai | Last Updated: 29th March, 2020
Category: hobbies and interests woodworking
4.5/5 (2,291 Views . 25 Votes)
Reapply until all cracks and holes are completely filled. Inspect the roof and apply more as needed. For immediate repair, consider also using Flex Tape or Flex Glue. These can be applied in wet conditions, and can help prevent damage when you are unable to apply Flex Seal or Flex Seal Liquid.

Click to see full answer


Just so, how long does flex seal last on a roof?

A: Depending on the environment, coats added and maintenance, many people have found Flex Seal® will last for years without cracking, peeling or losing any of its strength or sealing properties.

Likewise, how do you seal a leaking roof? Use a thin, flexible putty knife to apply roof cement to small cracks in the sealant around chimneys, pipes, or other joined surfaces. For small gaps at the metal or rubber collar of an exposed pipe or vent, apply a bead of waterproof silicone-based caulk with a caulking gun.

Similarly one may ask, can you fix a roof leak from inside?

Once you've found the leak you can make a temporary leak patch from some plywood or shingle and some roofing tar. Use a putty knife to spread the tar into the leaking hole on the inside of your roof. Place the shingle or plywood onto the tar and spread more of the tar around the edges of your patch.

What will flex seal not stick to?

Flex Seal will adhere to most any surface such as: wood, metal, tile, concrete, masonry, fabric, glass, plastic, aluminum, porcelain, dry wall, rubber, cement, some vinyls and so much more! Flex Seal may not be compatible with all plastics, vinyls, or rubbers.

33 Related Question Answers Found

Will Flex Seal stop water leaks?

Flex Seal Spray Works
Yes it does! Many users have had great success with using Flex Seal for a variety of uses. Whether you are using it to fix a leak, prepare for a storm or using it as a sealant, we know that you will be impressed with Flex Seal.

Is Flex Seal good for RV roofs?

Metal RV Roofs
Flex Seal will adhere to almost any surface including wood, metal, aluminum, plastic, fiberglass, rubber, or vinyl or just about any dry (or even wet) surface. It does work best on dry surfaces, but if you are dealing with a leak during rainy weather, you can still stop the leak.

Does Flex Seal peel off?

It'll come off – just give it a heavy scrub. Cloth requires a little more care when it comes to removing Flex Seal. Unlike metal, you shouldn't use acetone on something like a soft-material couch. Instead, use mineral spirits* to remove the Flex Seal.

Does Flex Seal actually work?

We let Flex Seal dry for two days, in order to ensure the most accurate results. Then, when we run water over the leak in the pole barn as well as the colander, water seeps through! It did not work well for that. However, Jennifer predicts this product could work on very small holes.

Can I use Flex Seal on my exhaust?


If you have a hole in your exhaust, you can patch it with Flex Tape. Take a second piece of Flex Tape and wrap it around the entire exhaust – including the first patch that you attached.

Is Flex Seal flammable after it dries?

Yes. It can be used on oil and oil tanks. Is Flex Seal flammable? Flex Seal is non-flammable and safe product.

What is Flex Seal good for?

Flex Seal Liquid is your go-to liquid rubber. It will dry to the form of whatever object or surface you spray it onto. It's a flexible rubberized sealant that will expand and contract. Flex Seal works on wet surfaces, but it works best on dry ones, clean of dirt, grease, and grease.

How do you temporarily fix a leaky roof?

Make a temporary patch with roofing tar and a piece of shingle or plywood. Trowel the roofing tar into the leak on the underside of the roof deck, using a putty knife. Push the shingle or plywood into the tar and trowel more roofing tar around the edges of the patch.

What to do if roof is leaking during storm?

Temporary Tape and Caulk
Because it would be unsafe to climb on the roof during a storm, however, a tarp is not the best choice when you first notice a leak. Luckily, you can use roofing tape or caulk inside your attic to help close any holes or prevent water from flowing further.

Can you paint over Flex Seal?


Flex Seal Spray can then be painted over with almost all commercially available paints and urethanes. Flex Seal Liquid cannot be top coated with anything other than Flex Seal Liquid, however, you can add as many coats as you like. Just allow Flex Seal Liquid to fully dry between coats.

What color is Flex Seal?

Q: What colors does Flex Seal® come in? A: Flex Seal® comes in Black, Clear, White, Brite (bright white), Gray, Red, Yellow, Terra-Cotta, Blue, Green, Almond and Brown. Once dry, Flex Seal® can be easily painted any color.

How Much Does Flex Seal cost?

Compare with similar items
This item Flex Seal Liquid Rubber in a Can, 16-oz, Clear Flex Seal Liquid Rubber in a Can, 16-oz, Black
Customer Rating 4 out of 5 stars (718) 4 out of 5 stars (620)
Price $1499 $1499
Shipping FREE Shipping on orders over $25 FREE Shipping on orders over $25
Sold By Flex Seal Products Flex Seal Products

How much does it cost to fix leak in roof?

Most home owners spend between $300 and $1,100 for a roof repair, or an average of $650 per repair call. Typically, a job is to repair leaks. Seal the leak, replace shingles, seal the shingles. If there is a small area and few shingles being repaired, it will likely be on the low end, or as little as $150.

How do you find a leak in a roof?

If you have an attic, the easiest way to spot the leak is to up there on a rainy day. Water will reflect light, so bring a flashlight along. Once you locate the source of the water, mark the area. On a nice day, have a helper tap on the mark while you're on the roof.

Can a leaky roof cause mold?


Roof leaks cause two types of mold growth; systemic or limited growth. Systemic growth occurs when the roof leak causes enough moisture buildup in the attic to cause mold growth throughout the entire area. In these cases, the mold remediation efforts can focus solely on the area surrounding the leak.

Can leaking ceiling collapse?

Though it might seem strange to punch a hole in your ceiling to stop a leak, the new hole will allow the water to drain smoothly and relieve pressure on the rest of your ceiling. If water accumulates and pools, the entire ceiling could collapse.