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Thread: Sealant on vent pipes
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05-17-2011, 04:30 PM #1
Sealant on vent pipes
There was what appeared to be a roof sealant type material on the two furnace pipes and the water heater vent. Never seen this before, but I believe it is probably a flammable material. Anybody have any comments. If not flammable, what purpose would it serve?
Thanks,
Norm
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