Water Glass
 

Anybody else used "water Glass" (Sodium Silicate) on a cracked block in the old days?:confused::confused:

Re: Water Glass
 

Yes. Some stop leaks today contain water glass. All depends on the crack.

Re: Water Glass
 

I’ve used it years ago on my Buick Riviera and it works well but eventually the water pump bearing became rough and loose. I think when it gets past the seals on a modern water pump it ruins the bearing.

Re: Water Glass
 

I've used it for the passed 50 years with success on all but one engine. I've never had to use it on a model a or t engine. I never have had water pump trouble that I could tell. Used it on heavy equipment engines.

Re: Water Glass
 

I was not impressed with the stuff. On my fresh engine rebuild one head stud/nut weeped a bit. An old timer in the club insisted I use water glass. I flushed the cooling system for months as it kept clogging up the cooling system. Not a fan of this stuff.

Re: Water Glass
 

The instruction on the bottle say that all antifreeze must be flushed from the system. Guess the two do not mix. I do not recall if it says any specific type of antifreeze.

Re: Water Glass
 

I used water glass in my '37 Pontiac coupe. It would work for well for about a month and then I would have to add some more water glass. When it leaked, the water would go out of the exhaust. I drove the coupe for about two years, then I sold it to the junk yard for $25. Black pepper also worked well as a stop leak for me. This was in 1957.

Re: Water Glass
 

Yes but a stitch repair is better, depending on where the crack is.