Decrease the density of water.

Why not weld it from the outside when the tank is low and there is no leak? Weld it proper shut?

And I want more than 200 fg if my answer wins. Expert advice is not free.

This post was edited by Taurean on Sep 4 2018 10:02am

Tip for you is not to negotiate a price after you've provided a service.

make steel welded tanks instead of cheap plastic ones that will leak. if you're using sealant and steel u done goofed already.

If the tank expands and contracts, welding isn't a viable option. Is this sealant available in a caulking gun tube?

It may not be cost effective, given what they have as a budget, but it's certainly possible. Milk tanks swell when they're filled and they need to be welded up to the highest USDA specs of any food. Brewers use massive steel tanks to make beer, and those expand quite a bit under heat while brewing. You may be right tho, im curious what the application is here and what the "sheets" are made of that the OP is using. The expansion and contraction could be due to the materials as much as the application, im specifically wondering what sort of heat or cold extremes that tanks are exposed to. It might be as easy as oversealing the joints when they're made. But as the tank sheets are bolted welding would save on fasteners. However if the tanks need to be disassembled ever, seems unlikely given that they're using sealer, welding is a no go. Also if the sheets of steel are a thin guage, such as 1/16th inch or so, full welds wont be that possible either. I don't know of any dairy applications that use thinner than 3/16" for the sidewalls for that very reason, much easier to weld without poking through and u can grind the welds easier.

Usually do that, but took it on faith this time.

Obviously the gasket isn't flush on either side that's constant while it's under pressure experience coming from the egg background so essentially it's probably a mold problem with the tank you'll have to use a grinder to physically level the inside to make the gasket flush cuz what it sounds like is the fittings aren't sealing properly

.e talktotext

This post was edited by Ggfaker2018 on Sep 12 2018 11:31am

this is i guess the technical translation of "git gud"

Ok to clear a few things up, I have read all of the comments and nothing provided is going to work, however some things need to be cleared up.

These tanks are steel, and glass lined, making welding a no go because it would rust to fucking hell.

The intersection of the 4 sheets do not have a gasket, it is all bolted and sealed in and out.

The sealant is not available in a caulking gun tube.

The extremes these tanks are exposed to are simply the outdoors, nothing boiling and nothing freezing enters the tank.

Over sealing the joints from the inside when made is an excellent suggestion, and we do over seal to an extent. However with the tanks being up to 200ft tall the water pressure is very high when youre talking about all it needs is a very small void.

This post was edited by xVile on Sep 12 2018 05:34pm