#2 gray water tank crack

[Bobby A]

Up Date,

Just got a reply back from the company that makes the product Flex Seal that I spoke of in my earlier post. The companys claim is it DOES bond to ABS plastic, so if this is true this product may be a viable option. For anyone interested you can check it out on there web site FlexSeal.com, so if anyone has or will use this product please post back with your results, it could be a real life safer for some of us.

 

[wesley1963]

Eternabond, a readily available sealant tape for roof repairs is advertised as working to repair holding tanks. I think they even carry it in a small repair kit at some Wally Worlds....Don

I read several comments on the eternabond saying that it is better to use it on straight surfaces. Since this crack is at an angle (actually 2 angles), do you think it is worth a try?
Everything else has been a wash. The abs cement peeled off like Elmers glue in the palm. Tried the flexseal stuff, thought "what the heck". That seemed to seal until the tank flexed from getting full. A mobile rv service said that where the crack is it is probably not possible to fix it.
I've resigned myself to the fact that the tank needs replacement, but willing to try anything as an experiment. We won't be moving the unit for 4 more months, so I figure there is still time to fool around with it, perhaps helping others.

Someone in our park used marine epoxy on the bottom of his tank. Anyone have experience using that?? It has been holding 4 yrs now, but he doesn't move the unit.

 

[Invizatu]

Wes... You could try some "3M 5200" sealant. They make 2 versions, the standard with a I believe a 36 hour cure time and a fast dry version. I would use the standard version. It can be kinda messy to work with, hard to get off fingers etc. but is really good stuff. I lived in So. Florida for ten years and had a couple of boats and I used the stuff all the time below the water line (that's what it is designed for) and never had a leak. I also used it to repair a crack in a gas tank that I am pretty sure was made of ABS and it never leaked either. 3M makes some great products, you will find it in any good marine store (west marine etc.) and maybe even one of the big box hardware stores. Clean and prep the area again and give it a try. It stays somewhat flexible after curing so it would do well with flexing. Good Luck!

 

[wesley1963]

Wes... You could try some "3M 5200" sealant. They make 2 versions, the standard with a I believe a 36 hour cure time and a fast dry version. I would use the standard version. It can be kinda messy to work with, hard to get off fingers etc. but is really good stuff. I lived in So. Florida for ten years and had a couple of boats and I used the stuff all the time below the water line (that's what it is designed for) and never had a leak. I also used it to repair a crack in a gas tank that I am pretty sure was made of ABS and it never leaked either. 3M makes some great products, you will find it in any good marine store (west marine etc.) and maybe even one of the big box hardware stores. Clean and prep the area again and give it a try. It stays somewhat flexible after curing so it would do well with flexing. Good Luck!

Thank you for the quick reply. I will definitely get the standard version and give that a try and post the results.

 

[wildwolfproducts]

Wes... You could try some "3M 5200" sealant. They make 2 versions, the standard with a I believe a 36 hour cure time and a fast dry version. I would use the standard version. It can be kinda messy to work with, hard to get off fingers etc. but is really good stuff. I lived in So. Florida for ten years and had a couple of boats and I used the stuff all the time below the water line (that's what it is designed for) and never had a leak. I also used it to repair a crack in a gas tank that I am pretty sure was made of ABS and it never leaked either. 3M makes some great products, you will find it in any good marine store (west marine etc.) and maybe even one of the big box hardware stores. Clean and prep the area again and give it a try. It stays somewhat flexible after curing so it would do well with flexing. Good Luck!

I know this is an old post. But 5200 will seal about anything. We sealed a hole in a 5 Million dollar boat years ago. This was while it was under water. Was not a fun job, but works... If you can get some to go into the busted part, it holds better. Anytime you have it inside and outside, when it cures this locks it into the cut. Thus not going anywhere..
They used to sell a product that was 2 part, it was a putty. You mixed both parts until it turned green. I was for fixing gas tanks, even with gas leaking out of a tank it would fix it. But have not seen it for sale in years. But Permatex makes one these days that works also. http://www.permatex.com/products/au..._systems/Permatex_Plastic_Tank_Repair_Kit.htm But with any of these, be sure to clean the spot good. Then roughen it up with sand paper to allow what ever you use to stick to the tank. Also have fixed a few where we screwed small screws around the spot to patch, then add the items used to patch the hole. The screws allow the product to grab and hold better. But again make sure what ever you use gets into the hold the more the better. As it mushroom's into the inside it fills the crack or hole and will do better then just being on the outside.
Pete