tank sealer

T

tiquer

Senior Member
Had my 46 ford tank cleaned and pressure tested for leaks at the rad shop and all was good. When I got home I used a white colored tank sealer just to be sure I would not have to remove the tank down the road when the driving was just getting fun.Well no leaks but now the lines tank and new $300.00 dollar carb are full of some white crystal stuff almost like salt or sugar looking. The truck witch ran for the first 5000 miles with no problem will hardly run at all now. Any one else out there have a problem with the bill Hersh gas tank sealer???
 
I've used the Hirsch white sealer more times than I care to recall. NEVER a hint of trouble.
I am hazarding a guess but perhaps the tank was not clean enough. Maybe some type of chemical residue that a radiator shop uses was left behind. I always acid dip the tanks before sealing.
 
Nope the tank was brand new custom built for my 46 because no one makes a re pop for that model. So the tank , lines fuel pump and carb are all new . The liner was an insurance against rust or any pin holes in the welding process.
 
Maybe solution used to clean your tank was incompatible with the sealer. Did you follow all the steps Hirsh advised? If the tank was new was it cleaned specificly with the intent to use the sealer? Did the shop understand this?
 
Use por 15, I have done 3 tanks without a
problem ( follow directions very carefully especially drying of tank)
Gary.
 
I have used the white stuff from MAC's for several years on a number of tanks and never had a problem. All tanks were acid cleaned then washed out and sun dried then coated with at least three layers.
 
Why would you seal a brand new tank? I suspect the tank should have been acid etched to get the sealer to stick. It's tough to get anything to stick to new metal unless it is etched in some manner.
 
Are you sure the stuff is from the tank sealer? Usually it lets go in pieces not granular powder. Did you flush the fuel lines before you installed them? Don't they put stuff in the lines to prevent them from kinking when they bend them?
 
TJ said:
Why would you seal a brand new tank? I suspect the tank should have been acid etched to get the sealer to stick. It's tough to get anything to stick to new metal unless it is etched in some manner.
Click to expand...
My intention was to keep it like new , no rust issues down the rroad I thought
 
jim1932 said:
Are you sure the stuff is from the tank sealer? Usually it lets go in pieces not granular powder. Did you flush the fuel lines before you installed them? Don't they put stuff in the lines to prevent them from kinking when they bend them?
Click to expand...
The fuel line was made up from a new coil of 3/8 mild steal tubeing. There was no stuff in them untill now.
 
The bottom line here seems to be the tank was not prepped well enough prior to coating. Hirsch's sealer has been used way too many times with great results for a few decades now. Cleanliness within the tank is next to Godliness.
New steel is usually pickled to inhibit corrosion. If that was not removed by some type of acid etching, I can certainly see the sealer coming loose.
The granules? Like another fellow posted, IF the sealer comes off, it's in sheets akin to saran wrap, not granules.
 
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