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RTV vs Belicone Blue


#1

What is the difference something called “RTV molds” and other
zero-shrinkage mold rubbers like “Zero” and the Belicone blue
silicone rubber?

Jonathan Silo


#2

Dear Jonathan,

The initials “RTV” stand for"Room Temperature Vulcanizing". That’s
as opposed to vulcanization through heat and pressure.

The rubber compounds you mention are all RTV’s – different brands
and types.

Please be advised that "zero-shrinkage " mold materials will will
result only in zero-shrinkage molds,not in zero shrinkage castings.
There are just too many other factors involved, all introduced by
the user.

Michael Knight
Castaldo Products Mfg. Corp