Sealer removal

All other topics
Forum rules
Please do not start new topics here, but here: New Panhead and Flathead topics
Post Reply
Posts: 235
Joined: Tue Mar 16, 2004 10:45 pm

Sealer removal


Post by DuoDave » Fri Oct 20, 2006 10:30 am

I've just bought a 1971 BSA Rocket 3. The gas tank has been treated with a brown sealer which is all wrinkled up and peeling. I've tried two types of paint thinner, Nitromors paint stripper, drain cleaner, caustic soda solution and a long soak in boiling soapy water. The only thing that has had any effect so far is Resto Motive Marine Clean which took a little of the sealer off. I will get some more Marine Clean and persevere with it, but if anybody has any suggestions I would be happy to hear them.

Posts: 274
Joined: Tue Apr 17, 2007 9:21 pm
Location: Southwestern, Pa.
Been thanked: 1 time

Re: Sealer removal


Post by Sidecar » Fri Oct 20, 2006 12:19 pm

Brake Fluid?

Posts: 607
Joined: Tue Apr 25, 2006 3:45 pm
Bikes: 1949 FL Chopper
Has thanked: 5 times
Been thanked: 30 times

Re: Sealer removal


Post by caschnd1 » Fri Oct 20, 2006 2:32 pm

You might try Muratic Acid. It's easy to get in these parts at the grocery store where you find swimming pool chemicals. Make sure you protect yourself with good gloves and safety glasses. It is an acid and requires some special treatment. It will eat paint, etch concrete, burn skin, and wreak havoc with your eyes. I'll bet it will clean up the inside of that gas tank really well.



Re: Sealer removal


Post by Guest » Fri Oct 20, 2006 3:41 pm

If you are planning to repaint them anyway you can see if your local powder coater has a burn-off oven. I don't know if BSA tanks are welded or soldered though. Don't try this with soldered tanks or you will end up with a bunch of loose pieces of sheetmetal - but it will CLEAN sheetmetal ;D

Posts: 235
Joined: Tue Mar 16, 2004 10:45 pm

Re: Sealer removal


Post by DuoDave » Fri Oct 20, 2006 10:10 pm

Thanks for the suggestions folks. I have abandoned chemistry for the moment and resorted to some simple physics instead. I spent the afternoon with a length of copper pipe flattened at the end to make a scraper. the copper is bendy enough to allow me to shape it to get into all the nooks and crannies. This is only a two and a half gallon tank, but you would not believe the surface area. I thought I would never end pulling that crap out of there. I will give it another flush with Marine Clean tomorrow and another rattle round with the scraper and that should do it. If I ever have to do this again, it would be nice to find something that would dissolve this stuff. Maybe some kind of acid would be the way to go.

Posts: 1006
Joined: Tue Mar 16, 2004 5:52 am
Location: Sultan, WASH
Been thanked: 2 times

Re: Sealer removal


Post by mbskeam » Fri Oct 20, 2006 11:40 pm

try acetone, it will dissolve most sealers.this will take about 15-30 min.
if the paint is good on the tank then lacquer thinner works also but it takes a few days of sitting.


Posts: 277
Joined: Mon Jan 31, 2005 6:45 pm
Bikes: 1964 FL
Location: Missouri
Been thanked: 2 times

Re: Sealer removal


Post by kevsett » Tue Oct 24, 2006 3:19 pm

Acetone works well but at our paint mfg plants we really like methylene chloride based strippers. Sometimes there will be MEK and Toluene in there but the MC does the trick the best.
There are also a number of hydrogen peroxide based strippers out on the market that I've heard good things about, just not as good as MC type strippers.
Let us know what works.

Posts: 6912
Joined: Mon Aug 26, 2002 9:09 am
Location: Central Illinois
Has thanked: 100 times
Been thanked: 268 times

Re: Sealer removal


Post by Cotten » Wed Oct 25, 2006 3:49 am

If you are in the Midwest, try any ethanol-blend pump gas.
With a little patience, the extra additives will digest nearly anything organic.
Wear gloves.


Post Reply

Return to “General/Miscellaneous topics”