This is a 4oz 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)
Features:
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