Will it stick to outdoor wood and is it paintable?

I believe it would stick to wood outdoors. I can't verify that it can be painted as I've never tried to paint it.

Would this work on an exterior chimney crown?

It worked on a brick in my kitchen so yes it would however you might want to try the Paste version as opposed to the spray. The stuff is wonderful. No house should be without it.

Will this product break down the composition of styrofoam?

Hey there. We don't recommend using Flex Seal Spray on a styrofoam surface as the spray will cause the styrofoam to melt when it comes in contact with the spray.

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Flex Seal, 14 oz, 2-Pack, Gray, Stop Leaks Instantly, Waterproof Rubber Spray On Sealant Coating, Perfect for Gutters, Wood, RV, Campers, Roof Repair, Skylights, Windows, and More

Flex Seal, 14 oz, 2-Pack, Gray, Stop Leaks Instantly, Waterproof Rubber Spray On Sealant Coating, Perfect for Gutters, Wood, RV, Campers, Roof Repair, Skylights, Windows, and More

Product ID: 278387706

Details

Brand
Flex Seal
Item dimensions L x W x H
13.2 x 6.6 x
Item weight
28 Ounces
Material
Rubber
Style
Compact

⏳Long-lasting durability

💧Instant waterproof seal

🛠️Flexible rubber coating

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Bs.1841

Duties & taxes included

In stock

Sold byAmazon BoliviaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💧 Seal it, forget it — leak-proof your life with Flex Seal!

EASY SPRAY ON USE - Ready-to-use aerosol for quick, mess-free application
FLEXIBLE DURABLE - Dries to a tough, rubberized coating that flexes with surfaces
UV RESISTANT FINISH - Maintains integrity and resists fading under sunlight
SEAL LEAKS INSTANTLY - Stops water intrusion on contact for immediate protection
VERSATILE APPLICATION - Perfect for gutters, roofs, RVs, windows, and more

Flex Seal 14 oz (2-pack) is a gray, waterproof rubber spray sealant designed to instantly stop leaks and protect surfaces. It dries to a flexible, durable coating ideal for a wide range of outdoor and indoor repairs including gutters, roofs, RVs, and windows. UV resistant and easy to apply, it offers long-lasting protection that adapts to surface movement.

Specifications

ASIN	B00W5Y2X2W
Best Sellers Rank	#133,687 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #33 in Adhesive Sprays
Brand	Flex Seal
Brand Name	Flex Seal
Color	Gray
Compatible Material	Rubber
Customer Reviews	4.5 out of 5 stars 1,090 Reviews
Global Trade Identification Number	00810129871937
Item Dimensions	13.2 x 6.6 x 22.9 centimeters
Item Form	Spray
Item Weight	28 Ounces
Item dimensions L x W x H	13.2 x 6.6 x 22.9 centimeters
Item weight	28 Ounces
Manufacturer	Swift Response, LLC
Material	Rubber
Material Type	Rubber
Model	FSGRYR20
Number of Items	2
Part Number	FSSLVD20
Style	Compact
Style Name	Compact
Surface Recommendation	Roof
UPC	810129871937
Unit Count	1 Count
Water Resistance Level	Waterproof
Water resistance level	Waterproof

Reviews

C**S

It works very well

Works very well

15.06.2026

D**T

Works as good as on TV

I used this to seal a leak in my concrete fountain. I was a bit hesitant having only seen it on TV commercials and no one else's experience. I cleaned around the crack, sprayed 2-3 layers over it and refilled. It's been several months and no leak.

18.05.2026

B**N

Did the job

Excellent product

11.06.2026

M**T

As described. High price m

As described but overpriced

4.05.2026

A**R

Not for wood

Doesn't hold up well on wood.

7.06.2026

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Vikram D.

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

2 weeks ago

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

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