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, 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
Item weight
1 Pounds
Material
Rubber
Style
1 lb Black

🌊Dries underwater, works in wet conditions

💪Super thick, fills large gaps instantly

🛡️Waterproof & UV resistant seal

R2399

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Africa.

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Description

🛠️ Seal it. Paint it. Forget it. The ultimate fix for every crack and crevice.

SEAL LIKE A PRO - Creates a flexible, rubberized barrier that blocks air, water, and moisture for lasting protection.
STAY FRESH TECH - Innovative airtight container locks in freshness, ensuring no waste and maximum sealing power.
PAINT IT YOUR WAY - Fully paintable once cured, blending seamlessly with your décor while preventing rust and UV damage.
DI YS BEST FRIEND - Ideal for everything from home repairs to RV, marine, and garden projects—get it done with confidence.
BUILT FOR EVERY SURFACE - Compatible with wood, metal, concrete, glass, and more—perfect for indoor and outdoor fixes.

Flex Paste is a premium 1 lb black waterproof putty that forms a durable, flexible, and UV-resistant seal on multiple surfaces. It fills large gaps and cracks instantly, works underwater, and comes in a stay-fresh container to maximize shelf life. Perfect for professional-grade repairs and DIY projects alike, it’s paintable and compatible with a wide range of materials including concrete, metal, wood, and more.

Specifications

ASIN	B084TDS8S5
Best Sellers Rank	#60,542 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #67 in Putty Knives
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 (3,165)
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)
Item Weight	1 Pounds
Manufacturer	Swift Response, LLC
Material Type	Rubber
Model	FLEX SEAL - PFSBLKR16 - BLACK
Number of Items	1
Number of Packs	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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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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R2399

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Africa.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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