

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Africa.
💪 Seal smarter, not harder—flex your fix with Flex Caulk Hybrid!
Flex Caulk Hybrid Polymer Waterproof Sealant is a 9 oz, white, easy-to-use sealant that requires no caulk gun thanks to its adjustable trigger flow nozzle. Its advanced hybrid polymer formula guarantees a waterproof, shrink-proof, crack-proof seal on virtually any surface, wet or dry. Featuring a Snap & Save cap to reduce waste, it’s fully paintable and resistant to UV and chemicals, making it ideal for professional-grade sealing in kitchens, bathrooms, windows, and RVs.












| ASIN | B0D2F2DCXM |
| Best Sellers Rank | #136 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Adhesive Caulk |
| Brand | Flex Seal |
| Brand Name | Flex Seal |
| Color | White |
| Customer Reviews | 4.3 out of 5 stars 2,040 Reviews |
| Full Cure Time | 24 hours |
| Global Trade Identification Number | 00810129870756 |
| Included Components | Flex Caulk, White, 9 oz, 1-Pack |
| Item Form | Liquid |
| Item Highlight | No caulk gun needed, trigger flow nozzle, paintable, won't shrink or crack, seals wet or dry, bath, kitchen, sink, window, RV |
| Item Weight | 255 g |
| Liquid Volume | 9 fluid ounces |
| Manufacturer | Swift Response, LLC |
| Material Type | Hybrid Polymer |
| Model | CFSWHTR675 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Part Number | CFSWHTR675 |
| Surface Recommendation | Window |
| UPC | 810129870756 |
| Unit Count | 9 Fluid Ounces |
| Water Resistance Level | Waterproof |
H**R
It's good stuff
Works just like they said it would
P**D
Great in tight spaces. Hybrid is not water clean-up.
I certainly have used caulk guns many times, but I was working in a tight space. This made it easy! If your space is even tighter, you might buy the 3-ounce tube, but it is very expensive per ounce. I got the 9-ounce tube of the hybrid polymer. Which is still expensive per ounce compared to standard tubes. But the easy trigger makes it worth the money, especially when working in difficult places. There are advantages and disadvantages between silicone and polymer. For my application, polymer is much superior. But polymer is NOT water cleanup. That is not the product's fault, it is the nature of polymer sealant. You just need to know that. I did use my finger with it, and it isn't easy to get off but that is something I understood. I guess the only complaint I have with the spray can is that you can't tell how much you have left of the product. You just use it until it runs out. But the 9-ounce tube completed my project. One user complained that it was difficult to control the size of the bead even with the adjuster. I didn't have that problem, it came out great for me.
C**9
Flex seal has never let me down
I have tried most of the flex seal products and they are very good and haven’t been disappointed so far !
W**T
Good but could be better
I actually like this product . It works well and does a good job of sealing /caulking .. only thing I don’t like about it is , it ran out to quick for the little bit I did use of it .
M**D
THIS PRODUCT IS A VALUE ADD TO MY LIFE!
This is a six (6) month review: Traditionally I would have to do a re-caulk or repair in my shower stall after replacing caulk. I’m happy to report that after using the flex seal caulk, I don’t have to do that at this time! I’m getting older, have a torn knee meniscus, and it’s challenging getting up and down to caulk a shower stall. THIS PRODUCT IS A VALUE ADD TO MY LIFE. THANK YOU!
D**E
Easy to work with, very nice
This is expensive but I’ve got to say, comes out so nice and smooth, the application is very easy and it holds nicely.
R**.
FlexSeal Promised a Refund - NOPE!
I purchased 2 cans of FlexSeal to touch up a few areas in the kitchen and bath that had begun to erode. What a big mistake I’ve caulked before but I couldn’t find my caulk gun after a recent move. FlexSeal seemed ideal! No caulk gun needed. Based on the commercials and online videos, it seemed simple to use. NOPE! I was contacted by FlexSeal following my initial review. A representative said that I would receive a refund for one of the cans I purchased. After a month, I followed up with a call. Then I made another call and another call. Each time I left a message. To date, I never received a call back or that refund check. Save yourself some aggravation and don’t buy! Please read my original post. FlexSeal does not come out in a nice small bead. Even on the lowest setting, it spews out in a glob. It is sticky and adheres to surfaces almost immediately. You cannot use a caulk tool or your finger in order to get a tight seal because FlexSeal sticks to the tool and you. Here is the good part soap and water is pretty much useless against FlexSeal. You will need acetone or mineral spirits to get it off you and unwanted surfaces! I nearly scrubbed my hands raw trying to get it off me. Ladies, it will also eat away and discolor your nail polish! I made a mess in my kitchen on the backsplash and granite. A simple maintenance job with an inferior product is now costing extra money. I’ve now hired a handyman to tackle the FlexSeal mess and I’m stuck with an extra tube of the stuff. I only used the white tube and cannot return the clear. Amazon will not take it back!! They know this product doesn’t live up to the hype. I should’ve just bought a new caulk gun and regular caulk, and saved myself some money and aggravation.
D**5
Waste of money
Won't buy again, very little pressure and takes forever to come out.
D**D
Flex caulk expensive rubbish
I did want to return it as it doesn’t live up to the hype. Caulking mixture goes everywhere and it’s hard to remove to clean it up. I did also buy Flex Paste and when opened it was rock hard. I was able to get a refund on this one. Expensive rubbish
Trustpilot
1 week ago
4 days ago