Polyurethane foam or the PU foam was produced in the year 1950. The SPF or the Spray Polyurethane Foam is used for a wide variety of applications. It is used for construction applications which include roofing materials. It is also used to insulate interior walls. The SPF is insulation foam plastic which is sprayed in the form of a liquid. It expands more than its normal size after its application.
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