grahamdouglass
Senior Member
- Joined
- Nov 29, 2012
- Messages
- 421
- Location
- Canada
- Vessel Name
- Summer Wind 1
- Vessel Make
- Marine Trader 41
I replaced a degraded fibreglass water tank, that was 40 years old and leaking with a polypropylene tank. I asked for a topside inspection port. I was told it was water tight. It wasn’t even caulked to the tank. I tried Dow 732 silicone food grade caulking.
It’s tough to get a seal.
It only leaks when I fill the tank, the fill port is on deck and this tank is 3 feet below deck, below the floor boards in the lazaret. After I use a bit of water it no longer leaks.
If I can’t stop the leak I’m thinking of getting rid of the inspection port and patching the 8” hole caused by the removal of the inspection port. I have a separate air vent.
What is a good permanent bonding adhesive for polypropylene?
3m5200, epoxy ?
It’s tough to get a seal.
It only leaks when I fill the tank, the fill port is on deck and this tank is 3 feet below deck, below the floor boards in the lazaret. After I use a bit of water it no longer leaks.
If I can’t stop the leak I’m thinking of getting rid of the inspection port and patching the 8” hole caused by the removal of the inspection port. I have a separate air vent.
What is a good permanent bonding adhesive for polypropylene?
3m5200, epoxy ?