HomeSaver Non-Foil-Face 1/2″ x 24″ x 25′ Flexwrap These are great when you only need small pieces for stuffing in nooks and crannies. You can also use Non-Foil-Face FlexWrap for sealing between the shroud of an insert and fireplace facing. It’s also great for replacing the insulation seal between frames of glass doors and fireplace facing. Note: Non-Foil-Face FlexWrap is not UL Listed for use with any relining products. Features: Non-Foil-Face. Specifications: Overall Dimensions: 25′ (L) x 24″ (W) x 0.5″ (D).