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, 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, Half-Quart

Product ID: 215316310

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Details

Material
Rubber
Brand
Flex Paste
Style
1 lb Black
Item Weight
16 ounces
Item dimensions L x W x H
4.25 x 4.25 x

🌊Dries Underwater

🖌️Fully Paintable Finish

🛡️Waterproof & UV Resistant Seal

Description

🛠️ Seal, Protect, and Paint Your Way to Flawless Repairs!

PAINT IT YOUR WAY - Once cured, seamlessly paint over to match any surface and style—no compromises on aesthetics.
HEAVY DUTY GAP FILLER - Super thick paste instantly fills large cracks, holes, and gaps with superior adhesion.
FRESHNESS LOCKED CONTAINER - Innovative airtight packaging keeps the product fresh and ready, eliminating waste and ensuring peak performance.
VERSATILE PRO GRADE REPAIR - Perfect for indoor/outdoor use on walls, roofs, RVs, concrete, and more—trusted by pros and DIYers alike.
ULTIMATE WATERPROOF DEFENSE - Creates a flexible, rubberized barrier that blocks water, air, and moisture for lasting protection.

Flex Paste Waterproof Paintable Putty is a professional-grade, rubberized sealant designed to fill and protect large gaps, cracks, and holes. It offers superior waterproofing, UV resistance, and can even be applied and cured underwater. Packaged in an innovative airtight container to maintain freshness, this versatile putty is fully paintable and compatible with a wide range of materials including drywall, concrete, metal, and more. Ideal for both indoor and outdoor repairs on walls, roofs, RVs, and marine surfaces, it delivers durable, flexible protection with a sleek finish.

Specifications

Material	Rubber
Brand	Flex Paste
Item Weight	1 Pounds
Item dimensions L x W x H	4.25 x 4.25 x 2.5 inches
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
Water Resistance Level	Waterproof
Item Form	Paste
UPC	850010226804
Unit Count	16.0 Ounce
Style	1 lb Black
Number of Items	1
Color	Black
Surface Recommendation	Windows,Doors
Manufacturer	Swift Response, LLC
Part Number	PFSBLKR16
Item Weight	1 pounds
Product Dimensions	4.25 x 4.25 x 2.5 inches
Item model number	FLEX SEAL - PFSBLKR16 - BLACK
Size	No Size
Item Package Quantity	1
Measurement System	US
Special Features	Waterproof
Included Components	Household Item
Batteries Included?	No
Batteries Required?	No
Warranty Description	1 Year Limited