Can you use this Flex seal too caulk around your window frames? (more like a insulation)?, or stop a small draft creeping thru your window pane?

I'm sure you can. I have a waterwheel and trough. I sealed the trough, as it was leaking in several places. Even though water runs rapidly down the trough, I've had no leaking now for 2 years. I also used it to seal a leak on my ATV tir rim. The rim had a slight curve and wouldn't hold air. I sealed the sot that was leaking and it worked perfectly.

I have a leak in my car trunk, can this be used?

It really depends on why there is a leak, but probably not. If it's the weather stripping around the trunk (that rubber tubing stuff), I doubt that this stuff will replace or repair that. That's the most likely reason you have a leak. The seal needs replacing.

Can it be used on concrete?

Yes you can use Flex Seal on concrete.

I would like to use this to refinish and seal up a mobile home bathtub. Does it clean easily? Will it hold up to the constant use of a bathtub?

It will definitely seal and refinish the tub. I’m not sure about easy clean up as I only used it on a boat but it should clean up nicely as it seems to be self leveling spray and is very smooth when completely cured

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Description

💪 Seal it. Protect it. Forget leaks forever.

PAINTABLE FINISH - Customize your fix with a paintable white coating that blends seamlessly.
INSTANT LEAK STOPPER - Spray on and seal leaks fast—no waiting, no mess.
ALL WEATHER DURABILITY - Won't crack in winter or sag in summer heat, guaranteed.
LONG LASTING FLEXIBILITY - Stays pliable for years, adapting to surface movement without breaking.
VERSATILE SURFACE PROTECTOR - Perfect for gutters, roofs, RVs, wood, and more—one spray does it all.

Flex Seal 14 oz (2-Pack) is a waterproof, flexible rubber spray sealant designed to instantly stop leaks and protect surfaces like gutters, roofs, and RVs. It resists extreme temperatures without cracking or sagging, dries to a paintable white finish, and maintains long-lasting flexibility for durable repairs.

Specifications

Material	Rubber
Brand	Flex Seal
Style	FSWHTR20-A-2PK
Item Weight	2.3 Pounds
Item dimensions L x W x H	9.5 x 2.5 x 2.5 inches
Water Resistance Level	Waterproof
Item Form	Spray
UPC	810129871333
Unit Count	28.0 Fluid Ounces
Global Trade Identification Number	00810129871333
Number of Items	2
Color	White
Surface Recommendation	Roof
Manufacturer	Swift Response, LLC
Part Number	FSWHTR20
Item Weight	2.3 pounds
Product Dimensions	9.5 x 2.5 x 2.5 inches
Item model number	FSWHTR20
Is Discontinued By Manufacturer	No
Size	14 oz (Pack of 2)
Item Package Quantity	1
Measurement System	US
Included Components	Flex Seal Spray Rubber Sealant Coating, 14-oz, White (2 Pack)
Batteries Included?	No
Batteries Required?	No
Warranty Description	As Labeled

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