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Servicetech · 11-16-13, 07:47 PM

Mastic is not designed for flue pipes, just ductwork. 250F is about has high as it's rated for, not sure what happens when you exceed that. It is EXCELLENT as sticking to just about anything that's clean.

11-16-13, 07:47 PM	#11
Servicetech Apprentice EcoRenovator Join Date: Nov 2013 Location: Moore Oklahoma Posts: 267 Thanks: 108 Thanked 23 Times in 21 Posts	Mastic is not designed for flue pipes, just ductwork. 250F is about has high as it's rated for, not sure what happens when you exceed that. It is EXCELLENT as sticking to just about anything that's clean.