Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.
Desertcart purchases this item on your behalf and handles shipping, customs, and support to Spain.
🔧 Seal smart, seal strong — the last caulk you’ll ever need!
Flex Caulk is a versatile, hybrid polymer sealant designed for indoor and outdoor use. Featuring an adjustable trigger flow nozzle for precise application without a caulk gun, it provides a 100% waterproof, weatherproof, UV, and chemical-resistant seal. Its flexible formula prevents cracking and shrinking, adheres to wet or dry surfaces, and is fully paintable, making it ideal for everything from bathrooms to marine repairs.
| ASIN | B0D2FKVQDK |
| Best Sellers Rank | #123 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Adhesive Caulk |
| Brand | Flex Seal |
| Brand Name | Flex Seal |
| Color | White |
| Customer Reviews | 4.4 out of 5 stars 455 Reviews |
| Included Components | Flex Caulk, White, 9 oz, 2-Pack |
| Item Form | Liquid |
| Item Weight | 9 Ounces |
| Liquid Volume | 18 Fluid Ounces |
| Manufacturer | Swift Response, LLC |
| Material Type | Polymer |
| Number of Items | 1 |
| Part Number | CFSWHTR675-2PK |
| Surface Recommendation | Window |
| UPC | 810129871098 |
| Unit Count | 18.0 Fluid Ounces |
| Water Resistance Level | Waterproof |
G**S
Great product, very easy to use.
Bought this product to seal a tub and tub walls. This was one of the easier applications I had to do, loved the built-in caulk gun with thickness selector. Made the job very simple, and the product dried relatively quickly. I would definitely buy this product again for other home projects.
R**T
Fantastic
This stuff is fantastic. My second time ordering. Easy to use and works as advertised.
R**R
The more you use the texture gets more smoother and in line
Goood product works well ,easy application
K**Y
Easy to use even for a first time caulker!
Ok, Id never caulked before so I wasnt sure how its supposed to work, but this was really easy! You just push the little thingy and it comes out in a ribbon. I thought I would need alot more than I did need, its good stuff!
C**N
Flex Caulk
As advertised Works great Fast delivery Good deal
C**H
Compact and ready to use
They are handy and easy to use
A**R
Messy messy
Caulk is good; I bought a two-pack at that price, and everything should work great. The nozzle on top, the pressure of the can pushing it out, broke off. I had to use it because it's so expensive. It was just very difficult and very messy.
L**N
Good product
I really like the product! It was very easy for me as a woman to use. I have an old drafty house and I went around my house and sealed up all of my windows (21 to be exact) that I felt a draft coming from and believed me, it made a huge difference. It dries quick and so far it is leakproof. I highly recommend.
Trustpilot
2 weeks ago
3 days ago