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

3.8/5
Product ID: 214989979
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Details

  • Material
    Rubber
  • Brand
    Flex Paste
  • Item Weight
    1 Pounds
  • Item dimensions L x W x H
    4.25 x 4.25 x
  • Compatible Material
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💧Waterproof & dries underwater
🖌️Fully paintable for seamless finish
🛠️Super thick rubber paste fills large gaps

Description

🛡️ Seal it, paint it, forget it—ultimate waterproof protection 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 to match any surface, preventing rust and UV damage.
  • STAY FRESH CONTAINER - Innovative airtight packaging locks in freshness and extends sealing power—no waste, no hassle.
  • UNDERWATER APPLICATION - Unique formula allows application and curing even underwater—no project too tough.
  • VERSATILE SURFACE COMPATIBILITY - Works flawlessly on wood, concrete, metal, EPDM, roofing, RVs, and more.

Flex Paste Waterproof Paintable Putty is a premium rubberized sealant designed to fill large gaps, cracks, and holes with a durable, flexible barrier that blocks water, air, and moisture. It uniquely cures underwater, is fully paintable for a flawless finish, and resists UV damage and corrosion. Packaged in an airtight container to maintain freshness, it’s perfect for indoor and outdoor repairs on a wide range of surfaces including drywall, concrete, roofing, and RVs.

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Specifications

MaterialRubber
BrandFlex Paste
Item Weight1 Pounds
Item dimensions L x W x H4.25 x 4.25 x 2.5 inches
Compatible MaterialWood, Glass, Tile, Concrete, Aluminum, Metal, Brick, Stucco, Masonry, Copper, Fabric, Fiberglass, Ceramic, Porcelain, Natural Stones, Roofing, Pvc, Eifs, Cspe, Epdm, Hypalon Polyurethanes
Water Resistance LevelWaterproof
Item FormPaste
UPC850010226835
Unit Count16.0 Ounce
Style1 lb White
Number of Items1
ColorWhite
Surface RecommendationRoof
ManufacturerSwift Response, LLC
Part NumberPFSWHTR16
Item Weight1 pounds
Product Dimensions4.25 x 4.25 x 2.5 inches
Item model numberFLEX SEAL - PFSWHTR16 - WHITE
SizeNo Size
Item Package Quantity1
Measurement SystemUS
Special FeaturesStrong,Waterproof
Included ComponentsHousehold Item
Batteries Included?No
Batteries Required?No
Warranty Description1 Year Limited

Have a Question? See What Others Asked

Can this be used on flexible surfaces?
Seal wet surface
Flex seal pasta can it be used on curved surfaces?
Can I use in a in ground swimming pool to repair a crack

Reviews

3.8

All from verified purchases

D**E

Amazing product

Unfortunately, upon opening the plastic container, only half was usable as the outer sides of the container were hard and unusable. So, As much as I Love this product,, because of the price, and I only could use half of my purchase , I will not buy again.

S**.

Dried Up! Absolute Junk!!!

I purchased this Flex Seal and then a week later purchased another one. I went to go use them today and they are both dried up and unusable. Don't waste your time or money.

L**K

Good stuff, simple to use

I was worried bjt, it worked I repaired a fiberglass bathtub, it was thick, I globed it on and to worked good, my can was air tight and fresh, not permanent but long lasting patch, don't get it on your clothes,,,

H**N

works great

Worked great to fix my leak. unfortunately the product must have a shelf life. When I first opened it, peeled off the protective cover, , about 1/4 inch from the edge was already hard. There was enough in the center for my project. Glad I didn't need to whole can.

A**E

Seems to work.

I'd have returned this product if time had allowed.The top 1" was rock hard and completely dried out.I had to break through the top layer to get to usable product.It did stop the leak.I'd have given 5 stars if 1/4 of the product wasn't dried out.

A**R

Works great.

This stuff works great. Used it to seal some cracks in a basement wall where I had water coming in. The only thing I didn’t like is the can it’s put in. It’s hard getting out the material because of the lip for the lid. Previous version I used was in a plastic container and it was much easier to remove the material from the container. Otherwise this stuff works really well.

G**G

Easy to use

Perfectly seals

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.

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Khalid Z.

Great experience from order to delivery. Highly recommended!

1 week ago

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

Reema J.

Perfect platform for hard-to-find items. Delivery was prompt.

1 month ago

Flex Pastewaterproof Paintable Putty Spackle Sealant Fill Gaps Cracks Holes | Desertcart Martinique