Properties / Applications: Bayseal closed-cell X (CC X) spray-applied polyurethane foam insulation is a two component, HFC-245fa blown, medium density, structural system designed for commercial, industrial and residential insulation applications. The Bayseal CC X foam-forming system is comprised of an "A"component (aromatic diisocyanate) and a blended "B" component which included polyols, fire retarding materials, and additives. Bayseal CC X system has passed the International Code Council Acceptance Criteria 377, for spray-applied polyurethane foam insulation, Appendix X for use without the use of the prescribed ignition barrier and without the need for additional fire resistant coating. As with any product, use of Bayseal CC X foam-forming system must be tested (including, but not limited to, field testing) in advance by the user to determine suitability. Bayseal CC X foam-forming system is available in two grades for warm and cold weather applications: suggested ambient substrate temperatures are specified below.

Covestro sold their spray polyurethane foam business to Accella in 2017.