Rubberized sealant in a spray can : too good to be true?

[Joka]

Hi!

I've just discovered this fantastic product in Fiji, apparently imported from the Phillipines, called "Leak Sealer - rubberized seal".

https://www.bosny.com/leaksealerspray.html

I was wondering if anyone would see reasons to talk me out of it? For exemple, i see no mention about UV resistance, and I know that some types of sealant can actually make things worse when they fail...
I couldn't find much info on the contents of the can... has anyone tried it before?
Is there any boat chemist who could give their opinions on the product?

I mean... I would never use it on critical locations, where elasticity and resistance is critical and failure could be catastrophic or make damage! But i see dozens of little jobs that would work way better with this!

It's cheap, extremely convenient, and my first trials have been extremely promising! So far I've finally rendered leak free a hatch glass split in half, where all other sealants had failed quickly.
I've sprayed it on my leaky dodger seams with a tape guide, it nicely soaked in the fabric then dried flexible but tough, into a nice line.
I've also started spraying my electrical butt joints to make them waterproof (no "affordable" heatshrink crimps here!)

It seems like the wonder stuff, please stop me if you need before I spray my whole boat!!

[Joka]

Info found about "flex seal", which zppears to be similar :

"It is styrene butadiene copolymer based, with pigments, activators and solvent. It contains siloxane/oxime, so will cure via moisture in the air."

It doesn't mean much to me... , but maybe someone with a chemistry background will know he product!


Thanks in advance for your precious advices and contributions!

[Benz]

We'd rather you sprayed the whole boat then told us how it is....

[Joka]

Hahaha fair enough! Will keep updates on the results, I stayed on the safe side and only did little temporary jobs, but so far i'm quite happily surprized! Stuff is so easy to apply, dries quite tough and adheres well

[redhead]

I'd be glad to hear an update in a few months. I think the true test will be how it stands up to UV exposure day after day. Interesting product though - you won't know if you won't try!

[DoubleD]

Google "Flex Seal TV Ads" and you can see all the late night infomercials for the product(s). Not that every infomercial product does not live up to its claims, but buyer beware and I wouldn't stake my life on it.


DD

[S/V Adeline]

The *flex* products i have used really seem to work...but I only use them for short term *band-aid* situations.
Especially impressed with the 4in wide flex tape for use in exposed areas, it lasts months but is a mess to clean up (not as bad as cheap duct tape though)

[svfinlandia]

Originally Posted by DoubleD

Google "Flex Seal TV Ads" and you can see all the late night infomercials for the product(s). Not that every infomercial product does not live up to its claims, but buyer beware and I wouldn't stake my life on it.
DD

I have used flexseal around the house and found that after a couple of years of UV exposure it tends to dry out and crack. Works very well though while it is working.

Al, S/V Finlandia

[rfinklegal]

I used Flex Seal spray to waterproof a leaking storage compartment in our RV. The factory had not totally sealed parts of it. It worked well, but it was not exposed to UV light either.

[bjp447]

Never used it on a boat but did use it on wood and a pond liner at home.
It did seal the leak BUT was disintegrating a few months later. Good temp
fix but no fun getting it off for a real fix. Let us know how it works on FG.

[sailingchiro]

Used it on the boat in a limited section of frame on hard top. Most of it has weathered away in a couple of years. I won't reapply it. I will use paint.

[Gary Matthesen]

I used to to stop a slow leak on the bottom of a basement oil tank. Seems it does not work at all to adhere on a petroleum based leakage, even after a cleaning with acetone.

[nortonscove]

Used it to fix a small leak in my roof as a temporary fix during the winter and spring. Did the job in keeping the water out while awaiting the better weather and a proper fix.

[CaptTom]

Tried it on the joints of my PVC roof gutter. Didn't last more than a season or two. It has its uses but I think the advertisements promise more than it can deliver.

[Grattaway]

Chemz in NZ make one called Plastiseal - details on their website. Its an acrylic resin designed for things electrical and its good for lots of other uses. It handles a marine environment very well. Can be soldered through and we use it in our coldstores. I havent measured its UV rating though and I am sure plenty of other overseas manufacturers will have something similar