Flex Paste, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs, Black, Quart
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Flex Paste, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs, Black, Quart

3.9/5
Product ID: 225321582
Secure Transaction
12 interest-free installments with tabby

Details

  • Material
    Rubber
  • Brand
    Flex Paste
  • Style
    3 lb Black
  • Item Weight
    3 Pounds
  • Item dimensions L x W x H
    5 x 4.25 x
💧Waterproof & underwater drying
🖌️Fully paintable finish
🛠️Super thick, fills large gaps

Description

🛡️ Seal it. Paint it. Forget it. The ultimate fix for every crack and crevice.

  • SEAL LIKE A PRO - Creates a flexible, watertight rubberized barrier that blocks air, water, and moisture.
  • PAINT IT YOUR WAY - Once cured, paint over it seamlessly to match any décor or surface color.
  • VERSATILE DURABLE - UV resistant and rust-preventing, perfect for indoor/outdoor, RV, marine, concrete, and more.
  • HEAVY DUTY FILL POWER - Super thick paste clings instantly to fill large cracks, holes, and gaps with ease.
  • UNDERWATER APPLICATION - Unique formula allows application and drying even underwater—no project too wet.

Flex Paste Waterproof Paintable Putty is a premium black rubberized sealant designed to fill large gaps, cracks, and holes across multiple surfaces. Waterproof and UV resistant, it uniquely cures underwater and can be painted over for a flawless finish. Ideal for professional-grade repairs on walls, roofs, RVs, concrete, and more, it locks out air, water, and pests while preventing rust and corrosion. Made in the USA, this 3 lb quart container features a freshness-locking lid to maximize shelf life and minimize waste.

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Specifications

Surface RecommendationWindows,Doors,Tub
Water Resistance LevelWaterproof
Item FormPaste
Compatible MaterialWood, Glass, Tile, Concrete, Aluminum, Metal, Brick, Stucco, Masonry, Copper, Fabric, Fiberglass, Ceramic, Porcelain, Natural Stones, Roofing, Pvc, Eifs, Cspe, Epdm, Hypalon Polyurethanes
Material TypeRubber
ColorBlack
Style Name3 lb Black
Item Weight3 Pounds
Item Dimensions5 x 4.25 x 4.25 inches

Have a Question? See What Others Asked

Could you do several layers or one very thick layer to create a rubberized coating on something?
Any temperature requirement?
Can this be used to fix crack in small ref/frezer
can flex paste be painted ?

Reviews

3.9

All from verified purchases

H**P

Need to work efficiently and minimize product exposure to air.

Used it to fill in around, and cover; previously tar-filled expansion joints on a concrete driveway. It went on relatively smoothly until exposure to air began setting the contents while working with it and it became relatively lumpy and difficult to continue applying. I may brush the liquid over the paste later in a concerted effort to smooth the application? I may also try to smooth it with a wire wheel on my Ryobi string trimmer?

P**R

Flex paste to seal cracks

Easy to apply to cracks in my birdbath. It's clear so does not show that it's been repaired and the bath holds water for my feathered friends. Highly recommend. Going to next apply to cracks in my front cement steps.

C**S

Does NOT work as advertised!!!

UPDATE - I have been monitoring the pipe for the last few days. While I initially thought the paste was going to provide the fix I needed, that "thought" would be incorrect. The water started leaking again. Be smart/save your money and do not buy this stuff. I'm going back to what I should have done to start with - turn off the water and replace the pipe. This Flex Paste is JUNK!!!!Had a very small leak at the base of this water faucet (small droplets of water on the PVC surface). Based on the advertisement I thought the paste would be the perfect fix. I followed the directions as stated on the container. After apply a good initial coat, I still had the small leak. The next day, I applied another coat - still had the leak. The next day, after turning off the water to everything, I applied another coat heavy/massive amount of paste using both a putty knife and my hand. Left the water off for 1 to 2 hours and the leak appears to have stopped (after using most of the paste). What a pain!!!While using the paste, I was diligent in keeping the lid on the paste. At the end of each day, I would use a rubber mallet to hammer the lid on. Regardless of the tight seal, the paste still hardened.Probably would have been easier to just replace the bad piece of PVC that was leaking.

B**M

Usage requirements.

Sealed well for outside lanai windows below screen install.EZ application. Waiting for heavy rains here in fla.for any leakage. Hopefully gr8 coverage.

A**R

Great in clear

Flex seal is a great product. I use it to repair cracks in my stucco outside. Once covered, it does not cracks again. You still need to paint over it because with the clear you can still see the cracks even though they are sealed.

F**T

Ordered the "Stay Fresh" can, received the plastic tub

Amazon's web page shows the "NEW! Stay Fresh Container", but they shipped the old obsolete plastic tub. As many of the other reviewers have correctly stated, the plastic tub cannot keep the product soft, pliable and usable. I called the FlexSeal factory, and they are fully aware of the problem. If you order from the FlexSeal website, the factory is shipping the Stay Fresh can as of 2024, March 12.This is a good product, but it's a complete waste of money to buy it in the obsolete plastic tub. That form of packaging is incapable of keeping the product in usable form. It hardens from the top down. I bought two from local stores, and learned that if you squeeze the tub at the top and it doesn't feel soft, the product has hardened and won't be usable. Typically it will be softer near the bottom, but all of the product above (the unsqueezable part) is so hard you can't get it onto the putty knife. Amazon needs to stop shipping the product in the obsolete plastic tub.Update: I called Amazon Customer Service and advised them that the plastic tub packaging is obsolete and no longer being shipped by the factory, and that they should return all product in the plastic tubs, and ship only the product (in the can) shown on the web page. I was advised that they would do so. That was on March 16, the same day I ordered the new (can) packaging directly from the factory. It arrives today (March 20). Shipping was free. Looking forward to seeing how it performs in patching a stucco parapet wall.Update: I received the can from the factory. The product was fresh and easy to apply. Because I was applying it on stucco, it took more to fill all the nooks and crannies than I expected, so I will need another can to finish the job. I ended up doing the whole job with a putty knife. I applied it in full sunlight on a warm breezy day, but it stayed flexible enough to work it into a smooth surface as I went. I doubt it will need a second coat. I don't know how long it will last, but I expect it will be pretty durable. There is no way any rain is going to get through the FlexPaste. I used a rubber spatula to scrape all the product from the sides and bottom of the can. Clean-up was easy; I just wiped the material off the tools with paper towels.

T**N

ease of application

I liked the consistency of the putty. Easy to apply and set up in a time factor that allowed me to work the putty

E**N

Excellent product that worked as advertised. Maybe a little better.

I had two stainless steel water tanks in my boat that both developed long cracks. Most folks had suggested that I weld them. It looks like that had already been tried and failed. I stopped drilled the cracks and use 3 layers of flex paste along with carbon fiber to do the repairs on both tanks. Perfect. After two months of use, it's still holding.My can arrived in good shape. I have read some of the ones where they had dried aout. Mine was in great shape.

Common Questions

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Pooja R.

The customer service exceeded my expectations. Perfect for buying products you can't find elsewhere.

1 week ago

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

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Secure Transaction
12 interest-free installments with tabby

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

Flex Paste Waterproof Paintable Putty Spackle Sealant Fill Gaps Cracks | Desertcart KSA