Appendix M to Subpart G of Part 82 - Unacceptable Substitutes Listed in the September 30, 2004 Final Rule, Effective November 29, 2004

Appendix M to Subpart G of Part 82 - Unacceptable Substitutes Listed in the September 30, 2004 Final Rule, Effective November 29, 2004

Foam Blowing - Unacceptable Substitutes

End-use	Substitute	Decision	Comments
All foam end-uses: - rigid polyurethane and polyisocyanurate laminated boardstock - rigid polyurethane appliance - rigid polyurethane spray and commercial refrigeration, and sandwich panels	HCFC-141b	Unacceptable Closed cell foam products and products containing closed cell foams manufactured with this substitute on or before December 1, 2017 may be used after that date	Alternatives exist with lower or zero-ODP.
- rigid polyurethane slabstock and other foams - polystyrene extruded insulation boardstock and billet - phenolic insulation board and bunstock - flexible polyurethane - polystyrene extruded sheet - Except for:1 - space vehicle - nuclear - defense - research and development for foreign customers

¹ Exemptions for specific applications are identified in the list of acceptable substitutes, which is available on the SNAP Web site at: https://www.epa.gov/snap/foam-blowing-agents.

[81 FR 86883, Dec. 1, 2016]