Can this be used on flexible surfaces?

Depends on how flexible. It has to be able to adhere to the surface. It cures the same as rubber in a tire. There is some give.

Hello there. That's an excellent question. Flex Paste can be applied to dry or wet surfaces and even underwater. It does not dissolve, creating a watertight seal. Thank you very much for reaching out to us with your question. Please write to us anytime. We're always happy to help. Flex On!

Flex seal pasta can it be used on curved surfaces?

Yes it can be used on any curved and even upside down surface but if ordering on-line, if you open the can and the edges are turning hard return it ASAP because chances is it's hard on bottom as-well and you don't get your money worth

Can I use in a in ground swimming pool to repair a crack

Yes, it can be applied underwater. It won’t dissolve or wash away. It even dries underwater! Flex Paste is easy to use. With a putty knife, trowel, spatula, roller, or stiff brush remove a smooth even layer of material from the top of the tub. Scooping deeply into the tub may cause air pockets which can dry FLEX PASTE. Apply a generous amount using a smooth sweeping motion.

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

Product ID: 267848373

Details

Brand
Flex Paste
Item dimensions L x W x H
10.8 x 10.8 x
Material
Rubber
Style
1 lb Black
Water resistance level
Waterproof

🌊Dries Underwater

🖌️Fully Paintable Finish

🛡️Waterproof & UV Resistant Seal

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€ 53.03

Duties & taxes included

In stock

Sold byAmazon FinlandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛠️ Seal it, paint it, forget it — the last putty your projects will ever need!

CUSTOMIZABLE FINISH - Once cured, paint over it to match any décor while preventing rust, corrosion, and UV damage.
ULTIMATE WATERPROOF DEFENSE - Creates a flexible, rubberized barrier that blocks air, water, and moisture for lasting protection.
EFFORTLESS LARGE GAP FILLING - Super thick paste clings instantly to fill cracks, holes, and gaps with no mess or shrinkage.
STAY FRESH CONTAINER TECHNOLOGY - Locks in freshness to extend sealant life and prevent waste—ready whenever you need it.
VERSATILE SURFACE COMPATIBILITY - Seals and repairs on wood, concrete, metal, glass, and more—perfect for indoor and outdoor projects.

Flex Paste 1 lb Black is a premium waterproof, paintable putty designed to seal gaps, cracks, and holes across a wide range of materials. Featuring a stay-fresh container and the ability to cure underwater, it forms a durable, flexible rubberized barrier that resists UV damage and corrosion. Ideal for professional-grade repairs on walls, roofs, RVs, and more, this versatile sealant ensures long-lasting protection with a flawless finish.

Specifications

ASIN	B084TDS8S5
Best Sellers Rank	#98,310 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement )
Brand Name	Flex Paste
Color	Black
Compatible Material	Wood, Glass, Tile, Concrete, Aluminum, Metal, Brick, Stucco, Masonry, Copper, Fabric, Fiberglass, Ceramic, Porcelain, Natural Stones, Roofing, Pvc, Eifs, Cspe, Epdm, Hypalon Polyurethanes
Customer Reviews	3.8 3.8 out of 5 stars (3,133)
Included Components	Household Item
Item Dimensions	10.8 x 10.8 x 6.4 centimeters
Item Form	Paste
Item Type Name	Flex Paste 1 lb Jar (Black)
Manufacturer	Swift Response, LLC
Material Type	Rubber
Model	FLEX SEAL - PFSBLKR16 - BLACK
Number of Items	1
Part Number	PFSBLKR16
Style Name	1 lb Black
Supported Standards	ASTM C-920
Surface Recommendation	Windows,Doors
UPC	850010226804
Unit Count	1 Count
Water Resistance Level	Waterproof

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