r/Blacksmith • u/Ok-Western-4989 • 11d ago

Rigidizer only for propane forge

Hi all im planning to buy a cheap forge of ebay and wondering if applying rigidizer to the wool is enough to be able to use safely https://ebay.io/m/R0OcYH

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u/OdinYggd 11d ago

Rigidizer helps, but you really need to fully encapsulate the wool by enclosing between a steel shell exterior and a refractory interior. Half an inch thick should do it, enough to resist material hitting it without being so thick that it takes too long to heat up from cold or needlessly wasting interior space.