I did a similar repair on a smaller tank and the internal pressure bulged the Flex Seal and eventually it failed. I resealed the outer patch PLUS I did the same repair to the INSIDE of the tank as well and so far it is holding without bulging at all. Just thought I'd throw that out there for whatever it's worth.

I used it to seal my gutter joints and so far it's held well but like you I'm skeptical about pressure on it.

This is the second one for the basement bat. kzfaq.infoUgkxOuLt8IL_GxhhaK8DBuKEL-zV0UJVpWZn , works great

I tried the NEW Flex PASTE! I have a Fiberglass Tank on my RV. The stuff is WORTHLESS! FLEX PASTE (On TV) works fine if you trying to seal from the inside out. And unless you can get inside the tank, is the only way this stuff will work. However, with a Tank, the Inside Pressure on the tank will force itself thru the outside patch and eventually start leaking again! Just cleaning the outside of the crack (with Acetone) and then patching, WILL NOT WORK! After I patched the small crack in my tank, let it sit for 48 hours, the patch was dry and solid. However, when you add water to the tank, you have now created a NEW DYNAMIC, Water Pressure from the inside of the TANK. Will push thru the crack and once again start leaking. In fact after leaving it sit another 24 hours, actually pushed the patch away from the tank and I was able to just peel the patch off the tank! It DID NOT Adhere to the tank material. Also, the FLEX PASTE dries very quickly and in my case the JAR that was sent to me was already HALF DRY. So, the 1 pound Jar I purchased was already hard when I opened it! FLEX PASTE IS USELESS for any kind of Leak that has a continuous pressure behind the crack, like an RV TANK! Definitely a BUYER BEWARE product. SAVE Your Money!

Would a heat gun make it cure faster?

Plastic cooler ke liye use hoga

it only lasts about 2 years than dries out and flakes off

There are no commercial glues that actually work on high density or low density polyethylene (HDPE/LDPE) or polypropylene (pp). Check the 3M website. If you can create one you'll get rich. But until then, if you have a cracked tank call a local plastic welding service, so you can go back to not worrying about your tank, as it will have been done properly.

I have a 820 and would like to talk with you about yours and where you are getting your parts.

Interesting , it may work. If it doesn't you could drill bigger holes and use bulkhead fittings.

You could've put gorilla tape over the holes and put the flex seal on there

as seen on TV...buyer beware...remember Bay Watch,,,,,point made fiberglass repair might work better

THATS ALOT OF DAMAGE

The liquid slips right through the holes..... that nails fix is ridiculous.

Great video, well thanks for not showing if it worked

That stuff sucked for me

kzfaq.info/get/bejne/haiIoLpiv5zZeHk.html this is how I fixed mine!

it only lasts about 2 years than dries out and flakes off