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!

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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.

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
454 g
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

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

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Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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