This picture shows all 3 types of insulation in our house. The ceilings are a plastic-like expanding foam. The walls are cellulose (recycled paper) that is treated with Borate to help keep termites away and to help retard fires. The windows (and doors) are all surrounded by a tight layer of `Good Stuff' brand window and door sealant, it worked great. We tried to use a similar product by DAP, it was not so good and would barely come out of the can.

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