Ratings & Reviews for Flex Paste 8.75-fl oz Black Paste Waterproof Rubberized Coating

Terrible product

It was almost hard when i opened it. Probably expired

Works well around areas you don't want to see it & hasn't turned yellow from heat or sun light, since I started using these products. Lowes had the best deal on it & I got several tubes.

Excellent waterproofing product. Got to repair some leaks on RV roof. NO MORE LEAKS !

Excellent Waterproofing

Bought to seal up some leaks areas on my RV. I love FlexSeal products & Lowes had the best deal whem I got this & 4 other products by FlexSeal.

Good sealant for your home!

[This review was collected as part of a promotion.] This stuff is so helpful as I renovate my old house. Part of my house is partially underground and some of the cinder blocks had gaps in them. I used the flex paste to fill those gaps and it created a strong thick seal! Highly recommend!

Versatile for many surfaces

[This review was collected as part of a promotion.] This paste is great! It doesn’t run which is super helpful. There are so many surfaces you can use it for repairs. I will be ordered again I think next time I will get the clear paste as it’s more versatile and invisible! We’ve used it outside our home and inside of our home.

Nice packaging

[This review was collected as part of a promotion.] I honestly could not find anywhere to test this out in my home. It is a very specific use case and we do not currently have any water leaks so I could not find anything to test it out on. 

Too good a clearance price to skip

This product was on clearance, and price was worth a chance. Other shelf stock had a broken lid, and the product was hard in there. There is special instructions to make sure you don’t discard a seal meant to keep air from hardening the product, so I fully expect that once opened, the performance of the remaining unused sealant will harden and be discarded. This is an expectation, not actual performance.

Works incredibly!

[This review was collected as part of a promotion.] This Flex Paste super thick rubber paste was incredible! I did not expect it to work as well as it did. It has great adhesion and has lasted for a long time so far!

Works as advertised

[This review was collected as part of a promotion.] Works as described. Easy to open and re-seal. I do worry about using it again and if it will still be as “fresh”. Helped prevent leaks around basement.

I guess it works

[This review was collected as part of a promotion.] I didn’t really like this. Did it “fix” the hole in the hose? Yeah it did so there’s that but my flex paste come in the container so dry and I wasn’t even sure I was gonna be able to test it. I got the dry crunchy layer off and managed to try it on my leaking hose. The appearance isnt bad. It’s black rubber paste that covers well. The smell isnt something i enjoyed hit overall it did its job.

Great stuff

[This review was collected as part of a promotion.] This stuff is amazing. I had some cracks that needed repaired outside and it worked amazing. Still holding up strong. Easy to apply. Goes on great.

This paste works great

[This review was collected as part of a promotion.] This works amazing! I’ve used it on a couple of different materials and it bonds nicely. This is definitely a good thing to have in your toolbox. Works great for temporary fixes as well

Super thick

[This review was collected as part of a promotion.] Flex Seal Black Flex Paste is definitely super thick as it says. I used it to fix a plant pot that literally broke in half. The paste itself is easy to use, and it seems to have dried very nicely, but i would rather have it in a tube of some sort. It's a good product for what it is used for.

Perfect to strongly seal leaks or cracks

[This review was collected as part of a promotion.] I am not super handy, but there was a leak in one of the pipes in my basement where the PVC connected to another piece of PVC pipe. I added some of this product to the seal where the pipes were connected. I liked how this was black so I could see where I applied it to the pipes. It dried quickly and has prevented any water from leaking out of these pipes. I am looking forward to using this on my upcoming projects.

Works well!

[This review was collected as part of a promotion.] This works wonders! We used a little to patch our roof, seal a small area near our back door and are looking for other things around the house to use it for too. It's a nice thick paste so it's very easy to apply intentionally without worrying it will run or drip and it's a flexible consistency as well. It doesn't have a strong odor which was nice! It dried as a very sturdy barrier so I'm sure our repairs will last a long time. Definitely a gre...