This is a 4 oz bottle of milled fiberglass that is used to strengthen epoxy bonds. It is mixed with epoxy glue at a ratio of 1/4 to 1/2 teaspoon per ounce of epoxy. (ratio verified w/product manager KB 4/00)
Increases the strength of any epoxy Perfect for adding strength to firewalls, wing hold-down blocks, landing gear blocks. Easy to use. Can be smoothed over with isopropyl alcohol for a sleek finish.