Gaco One Pass 2lb Foam (WINTER)GacoOnePass 2 lb. Closed Cell Foam installs quickly in up to 4+ passes which reduces labor costs by 50% or more and offers 20 30% higher yields than standard 2 lb. foams when sprayed in one pass at 3 to 4 thickness. As an ABAA Evaluated Material as part of an ABAA Evaluated Assembly, GacoOnePass is approved for use in air barrier systems. It is Appendix X approved for use without an additional ignition barrier and meets the requirement for a Class II