the magic black block

[steptoe]

known as seal wel, for sealing up coolant leaks, was appearing on ebay in boxes of 28 for about $90.

I had a hell of a time trying to find out what these were called, where they could be got , all that stuff -

found this on ebay

http://www.ebay.com.au/itm/Circa-1930-4 ... 27d1ba9787

Link will die off with age, but loooks to be Lusco branded product and been around for a long time.

A no mess, no fuss approach to adding a fix it stuff to radiator, as it comes in a dry black block - no bottle to break or leak, no need to flush coolant etc.

Just keep the block dry in storage