Hi, Is there any difference between the orange and the grey glue when used for furnace exhaust vent? Thanks?
I think that orange label can is still the grey glue meant for PVC (65°C). We usually use this with furnace venting.
They may have changed their packaging although using an orange label is kind of confusing.
The orange glue is meant for CPVC (90°). We usually use this with boiler venting.
I would just make sure the can says PVC or CPVC, depending on what you are installing.
Don't forget to use the clear or purple primer when working in 0°C weather.