MGB & GT Forum

I had a can of foam in a can blow up in my shop one time. It is NOT cleanable! Bottom blew off the can and turned it into a rocket, poking a hole in the tin roof and covering everything with that damned sticky foam that nothing cuts

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Lord, please give me patience because if you give me strength I will have to ask for bail money, too

On his mountain bike it may have been Slime brand which is green and not an aerosol. I use it on ATVs and on my lawn tractor. No problem I know of, I had two tires replaced which had Slime in there and the shop didn't say anything. On cars I have the fix a flat for emergencies, but haven't used it yet.

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1958 ZB Magnette, White over Burgundy, 3 main, twin SUs.
1962 MGA MkII Red, stock 1622, dual SUs
1963 MGB Rdstr Dark blue, stock 3 main, dual SUs with OD.
1976 MGB Rdster BRG, Weber 45 DCOE, OD.

The fix a flat makes a total mess on the inside of your tires. I think that Hap is right about the problem being in the bead. That's the spot where the tire touches the rim and is held in place.

On old rims they usually get corroded. You can do this. I assume that you have the two old rims from your car. And that they don;t have tires on them anymore, because they're on the new (old) rims from the salvage yard. Take those rims and clean and scrub the bead area. Rims don't usually leak anywhere else. But I suppose it is possible, just not probable. If you have trobule getting the rust off. Go get yourself some Metal Ready for POR15. This product will make the rust go away really quickly. I use it in conjunction with a metal brush and rust disappears.

I would do this with all of the tires. Then if this doesn;t work, just go buy yourself 5 new tubes from any tire store or Moss motors. Basically anywhere. Tubes are sold at almost all parts stores.

It's not worth the extra effort of killing yourself trying to find rims that will hold air, when a tube will fix the problem. It doesn't affect the driveability at all. It will make fixing a flat a little harder, but nothing else.

The use of fix a flat should only be used in an emergency, never as a rule. It makes a mess, it makes the tires get out of balance, and not to mention, the tire guys hate working on rims that have it in there.

I would go the tube route before going the fix-a-flat route.

Good luck!

Brian