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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Flex Paste(フレックスペースト) 1ポンドジャー

Product ID: 728213860

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

🎨Fully paintable after curing

🕳️Fills large gaps & cracks

🛡️Waterproof rubberized barrier

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S$96

Duties & taxes included

In stock

Sold byAmazon SINGAPOREDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛠️ Seal it, fill it, and forget it—flex your fix with Flex Paste!

CUSTOM FINISH READY - Paint over once cured to match your style and resist rust, corrosion, and UV damage
SUBMERSIBLE STRENGTH - Works underwater and dries in water—perfect for indoor & outdoor projects
GAP FILLING POWERHOUSE - Super thick paste instantly fills large cracks, holes, and imperfections
VERSATILE DIY ESSENTIAL - Ideal for foundations, roofing, RVs, marine, pest-proofing, and more—your all-in-one repair solution
SEAL PROTECT LIKE A PRO - Locks out air, water, and moisture with a flexible, durable rubberized shield

Flex Paste 1-Pound Jar is a premium, waterproof rubberized sealant that penetrates deep to lock out air, water, and moisture. Its super thick formula fills large gaps and cracks instantly, cures to a flexible, paintable surface, and withstands rust, corrosion, and UV exposure. Submersible and versatile, it’s perfect for a wide range of indoor and outdoor repairs, from foundations to marine applications, making it a must-have for every serious DIYer and professional.

Specifications

ASIN	B084TDS8S5
Amazon Bestseller	#227,009 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #67 in Lard & Rendered Animal Fat #137 in Adhesive Caulk
Brand Name	Flex Paste
Color	Black
Compatible Material	DIY
Customer Reviews	3.7 3.7 out of 5 stars (867)
Item Dimensions	10.8 x 10.8 x 6.4 cm
Item Form	ジャー,ペースト
Manufacturer	Flex Seal
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	16.0 Ounce
Water Resistance Level	Waterproof

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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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