SealTite PRO Open Cell XTR is a two-component, light-density, one-to-one by volume spray-applied polyurethane foam with ultra-low VOC and the only SPF product to earn the UL formaldehyde-free certification. SealTite PRO Open Cell XTR does not require mixing or agitation of the resin prior to application. SealTite PRO Open Cell XTR is an insulation system designed for use in commercial and residential applications. Use in lieu of more traditional forms of insulating materials such as fiberglass, cellulose or other loose fill products. Typical areas where SealTite PRO Open Cell XTR is applied are exterior and interior walls, vented attics, unvented attic assemblies and between floors.