Can You Use Flex Seal to waterproof a basement?

Asked By: Gessica Funcken | Last Updated: 23rd June, 2020
Category: home and garden home appliances
4.6/5 (3,155 Views . 34 Votes)
Flex Shot and Flex Seal Liquid are great options for attacking a basement wall leak. Many other products in the Flex Seal Family are waterproof, so consider using Flex Glue, Flex Tape or Flex Seal Spray for other areas that may be experiencing water intrusion, or other repairs around the basement.

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Similarly one may ask, can you waterproof a basement from the inside?

DO apply a masonry waterproofing product to bare interior basement walls. If your foil test showed that water is soaking through your basement walls and leaving them wet, seal the interior of the walls with a high-quality waterproof paint, such as DRYLOK White Extreme Waterproofer (available from Home Depot).

Furthermore, does Flex Seal liquid work on pools? Works Great on Pools If you have a pool that springs a leak, you may want to try The Flex Seal Liquid Rubber in a Can to fix it. People who had pools found success at using this product to fix their pool leaks. After 24 hours the pool was filled with water and there were no leaks.

Additionally, does Flex Seal adhere to concrete?

It will adhere to almost any surface such as porcelain, wood, metal, tile, concrete, masonry, fabric, glass, plastic, aluminum, drywall, vinyl, rubber, cement and just about any other wet (it works best on dry and clean surfaces even though it can be used on wet surface) or dry surface.

What is the average cost to waterproof a basement?

The average cost to waterproof a basement is $1,920 to $6,320, or between $3 and $9 per square foot for materials and labor. Interior basement repairs that don't require excavation cost around $500 to $1,500, whereas large extensive repairs with drainage and foundation issues run $10,000 or more.

35 Related Question Answers Found

What is the best sealant for basement walls?

RadonSeal Deep-Penetrating Concrete Sealer seals poured concrete and concrete blocks deeper and tighter than any other sealer on the market. The best basement sealer for your foundation walls and concrete floor against water seepage, vapor transmission and even radon gas.

Is Drylock good for basement walls?

This product is designed to prevent water from seeping through the foundation and walls in the basement. Drylock is applied to the walls and floor with a brush or roller and many times homeowners will use this as a do-it-yourself fix to wet walls and floors.

Will Drylok stop water?

If water is leaking through existing masonry or you need to protect new construction, DRYLOK® Extreme Masonry Waterproofer's proprietary formula is GUARANTEED to stop water.

What is the best basement waterproofing system?

The most effective basement waterproofing method is called interior water drainage. A drainage system can help avoid water buildup in your basement, moving the water from the footers of the house foundation and out below the basement floor.

Does Drylock basement walls work?


The UGL Drylok Extreme system is guaranteed to work for up to 15 feet of head or water pressure and for up to 15 years. It is not a crystalline system—it's more paint-like—although the manufacturer states that it does penetrate the concrete. A double-coating of UGL Drylok Extreme that still weeps water.

Why is water coming up from basement floor?

Ground Water
The most probable explanation for why water is coming up from your basement floor is groundwater. Water seeps its way through the soil surrounding your house and pushes up against your basement floor and walls where the hydrostatic pressure is rather great.

How much does it cost to waterproof a basement from the outside?

Waterproofing the exterior of your basement will cost between $9,000 to $15,000 for the average home. Most professionals will tell you that the best way to waterproof your basement is to fully waterproof the exterior, but it's also the most expensive option.

How do I stop my basement from seeping water?

Here are eight strategies to keep water out of your basement.
  1. Add Gutter Extensions.
  2. Plug Gaps.
  3. Restore the Crown.
  4. Reshape the Landscape.
  5. Repair Footing Drains.
  6. Install a Curtain Drain.
  7. Pump the Water.
  8. Waterproof the Walls.

How long does waterproofing a basement last?

This means that the length of time that basement waterproofing lasts varies depending upon the method(s) used. Waterproofing primers and crack injections are not permanent, but most of these products have a warranty of ten years. However, if they are correctly applied, they can last even longer.

Is Basement Waterproofing necessary?


The Truth About Basement Waterproofing. The majority of basement waterproofing today is being performed by system companies. True basement waterproofing is accomplished only by exterior excavation to the bottom of the foundation, installing proper drainage and treating the walls to prevent water from entering.

What is Drylock basement sealer?

A. DRYLOK® Concrete Protector has a curing compound and can be used on new concrete or old concrete to control dusting. It is a water sealer. DRYLOK® Floor & Wall Masonry Waterproofer stops water from coming up through the concrete floors. It is a waterproofer.

Is Flex Seal permanent?

A: Flex Seal Liquid has a shelf life of 24 months when properly stored.

Is Flex Seal tape permanent?

You do not need to drain the pool prior to applying FLEX TAPE®. FLEX TAPE® is a temporary, emergency repair and is not meant to be a permanent fix.

Can Flex Seal fix an air mattress?

Can I use Flex Seal to fix a hole in an air mattress? Yes. Spray the hole with the Flex Seal, cut a square out of a thin shirt or cloth, and place on the puddle of Flex Seal. Then, let the cloth soak up Flex Seal, smooth it out with your finger, let dry, and spray again with the Flex Seal.

Does Flex tape really stop leaks?


Flex Tape. PITTSBURGH (KDKA) – The makers of Flex Seal have a new product called Flex Tape. It claims to instantly patch, bond, seal and repair – fixing any leak, anywhere. According to Swift, it is “a super strong, waterproof tape that can instantly patch, bond, seal and repair.”

Can flex seal be removed?

Grab a damp rag and acetone*. Then scrub the metal until the Flex Seal is removed. This may require a little elbow grease. It'll come off – just give it a heavy scrub.

What is the best waterproofing paint for concrete?

The BEHR 5 gal. Basement and Masonry Waterproofing Paint with NanoGuard technology is an interior/exterior waterproofer specially designed for porous concrete and masonry surfaces.