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 Paste 1 Pound Jar

Q: 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.

Q: 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

Q: 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.

3.6/5

Product ID: 728213860

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Details

Material
Rubber
Brand
フレックスシール(Flex
Style
1lb Black
Item Weight
1 Pounds
Item dimensions L x W x H
10.8 x 10.8 x

🌊Works underwater, dries underwater

🎨Fully paintable & UV resistant

🛡️Waterproof rubberized barrier

Frequently Bought Together

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, Half-Quart

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, Cartridge

Flex Seal 2-Pack Black 17oz Stop Leaks Instantly, Waterproof Sealant Coating For Gutters, RV, Roof, Skylights, Windows

Description

🛠️ Seal it, fill it, and flex your fix game!

CUSTOM FINISH - Once cured, paint over it any color you want—UV and corrosion resistant for lasting durability.
UNDERWATER READY - Unique formula cures even when applied underwater—perfect for marine and outdoor projects.
FILL BIG GAPS INSTANTLY - Super thick rubber paste fills large cracks, holes, and gaps with ease, eliminating waste.
VERSATILE DIY ESSENTIAL - Ideal for everything from foundation repairs to RVs, showers, and pest-proofing your home.
SEAL PROTECT LIKE A PRO - Creates a flexible, airtight, and waterproof seal that locks out air, water, and moisture.

Flex Paste 1 Pound Jar is a premium, super thick rubberized sealant that penetrates deep to create a flexible, waterproof barrier. It works underwater, fills large gaps instantly, and is fully paintable with UV and corrosion resistance. Perfect for professional-grade repairs and DIY projects across indoor, outdoor, marine, and automotive applications.

Specifications

Brand	フレックスシール(Flex Seal)
Model Number	FLEX SEAL - PFSBLKR16 - BLACK
Product Dimensions	10.8 x 10.8 x 6.35 cm; 453.59 g
Color	Black
Name List for Name Plates	1lb Black
Material	Rubber
Are Batteries Included	No
Item Weight	454 g

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

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Smooth transaction and product arrived in perfect condition.

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

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Smooth transaction and product arrived in perfect condition.

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