Mark,

 

On the Zetex 600... are they used aluminumized 600 for firewall insulation?

 

Zetex 600 Aluminum Foil:

 

 

The Zetex 500, I did buy the roll, mainly to use as a large fire curtain for my welding area!  With Texas humidity my lathe and milling machine do rust, so the silicone material seems idea for my wife to sew up a couple of machine covers for those applications! 

(If anyone wants a yard or two, let me know)

 

Zetez 500 Silicone

 

Tom

(long term Bearhawk Builder)