Promat ULTIMA® VIP from Promat are high performance microporous insulation panels covered in an impermeable polymer outer envelope which is heat sealed under vacuum to optimize the thermal performance. The core of the Promat ULTIMA® VIP panel insulation is a blend of filament reinforced silica and an opacifier. The outer envelope is an ultra-low permeation barrier film that comprises multiple metalized polymer layers. Exact barrier film specification may vary according to the application.