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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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

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Details

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

⏳Long-lasting

💧Waterproof

🛠️Flexible Sealant

Description

🛡️ Seal the Deal with Flex Seal!

QUICK DRYING - Dries to a flexible, rubberized finish that lasts for years.
CRAFTY PRACTICAL - Ideal for arts, crafts, and outdoor decor—transform your projects!
VERSATILE PROTECTION - Perfect for gutters, RVs, roofs, and more—your all-in-one solution.
NO BATTERIES REQUIRED - Easy to use—just spray and seal, no extra tools needed!
SEAL IT DONT STRESS IT - Instantly stops leaks with a durable, waterproof coating.

Flex Seal is a versatile, waterproof rubber spray-on sealant that instantly stops leaks and provides a long-lasting, flexible coating. Ideal for a variety of applications including home repairs, arts and crafts, and outdoor projects, this 14 oz, 2-pack ensures you have the right amount to tackle any sealing job with ease.

Specifications

Product Dimensions	13.21 x 6.6 x 22.86 cm; 793.79 g
Item Weight	28 Ounces
Batteries required	No

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€ 89.78

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TrustScore 4.5 | 7,300+ reviews