The newest lightweight copper thru-wall flashing on the market is Copper Sealtite 2000. This non-asphaltic copper flashing consists of a 3oz. or 5oz. copper sheet laminated between two layers of dense fiberglass fabric. The nonasphaltic adhesive makes Copper Sealtite 2000 compatible with all types of commercial sealants. Because it is nonasphatic Sealtite 2000 will not stain masonry. Rolls 36” wide x 60’ long. Will slit to multiple widths.