We got the A-Team today; these folks had 10 years experience spraying foam. These chemicals take experience to work with...otherwise, everyone would be in this business!
Part A Chemical -- Demilec
Part B Chemical: Resin 
Chemcicals get heated up to 105 degrees and run through this machine before being pumped through hose and out to spray nozzle.
They take a hand saw and cut off the excess hardened foam so its flush with the framing.
Here, we filled the chimney flume to eliminate moisture and air infiltration.
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