Don!
Stop... Dont do a thing. Buy this:
http://www.sosoil.co.za/shop-more.php?pid=93
Been sold in America since 1914 and is an absolutely amazing product. We have yet to see any product work like this.
A prime example of how this product works. All Elwierda busses keep a tube of this in their tool kit. A year or so ago we had a bus at Cape Point start losing coolant... But it was quite a big hole.
They chucked in the Permoseal and allowed the engine to idle... When this "Curry Powder" as I call it comes into contact with air it hardens. They poured it in and it took about 20 minutes to seal as the hole was so big. They simply used a bucket under the radiator and as it leaked out they poured it back in until it sealed the hole.
That bus is still running with Permoseal in the radiator.
It wont block up the radiator and it is permanent. Its vibration proof and lets face it... If it didnt work would it still be on sale so many years later?
Even Silverton radiators use this product :mmm:
**Only when a customer cannot afford a new radiator though**
Mike