best stop leak?

[rogerkb1936]

i am running an original low mileage rad on my 31 PU. it is in nearly perfect physical condition. it has developed a small leak that is hidden. there used to be stop leak that would fix an ax hole. but i guess the eco-nazis didn't like it. or something. anyway, what is considered the best today? thanx.

 

[Special Coupe Frank]

I have had good results with a product called "K-Seal"; comes in a blue bottle with an orange cap. About $14.95 / bottle. "Works with all anti-freezes".

Does not seem to be a "goopy" as Bar's leak.

It's been sealing a pesky block crack on my '28 for 2 months / 1000 miles now.

 

[glenn in camino]

I like Alumiseal.

 

[V4F]

alumiseal ! ................... steve

 

[John Stone]

I recently discovered Silver Seal. It's been around since 1928. A good product to carry in the old travel kit.

 

[ratfink56]

might try the GM pellets. we sell lots of them at the dealership.

 

[Jim Brierley]

Alumaseal works for me. It also is easy to carry a spare tube of it as it is small enough to fit almost anywhere.

 

[Roger V]

Alumaseal has worked for me for years.

 

[Clydes 31 P/U]

Have a tube of Aluma Seal in the tool box. Have used the silver seal and even a bronze colored powder in the same sized tube. All have worked equally well in pressure systems. Hopefully I won't need to find out if they will work in the A system. Clyde