where can I find "hot blok".

Googled it but only usual suspects came up, e.g., CRC, K&W, Gunk, etc.

My idea was to use the water jacket block-offs I made to pressurized the block and find the bad sleeve to re-seal the water jacket, then just heat the block with propane up to over 200 degrees in order to do the hot seal.

Anyone have any more sophisticated setups?

 

You want sealer not a filler
The best reviewed products are going to be ceramic base

 

Is Hot Blok an off-the-shelf product? Still can't seem to locate it.

I see you are in Dallas and I am going to be up there today. is there someplace in the Metroplex where I can pick it up?

 

Dunno about local pick up.
Summit and jegs have a couple of products.
Hard blok is not what you want. That is a concrete filler for water jackets

Irontite has a ceramic sealer and through correspondence they believe it is suitable for such applications.
Moroso has an offering .... It is irontite with another label

A few others too

 

Whoa, is Hot Blok what they used on all those "cash for clunkers" engines they destroyed (talk about stupid ideas).

I thought you were serious. Good thing I asked twice.

 

Hot block is used to fill the bottom of the water jacket to help support the botton cylinders , not what you want i would look at @iron tite or gunk LIQUID BOILER SEALER from
A plumbing supply house. It is non metalic and woulds on high and low preasure sytems. Jmho

 

Yeah confusion set in with the racing concrete fill reference.....,
Not the goal. I researched a few different products and all of ceramic based stuff is pretty good for this application.
Must be a sealer that requires a heated application not a filler not liquid glass leak stop.

 

Thanks. Think I am going with Moroso Ceramic sealer from Summit.

 

good solid choice. fyi that is irontite. it is purchased from irontite and moroso labeled. so any irontite info on the process is exactly the same for moroso...and vice versa.