Description Upol Fibral Fibreglass Nikki 3lt. Fibreglass Filler, Fibreglass Bog. Features• Takes the place of short and long strand products• Spreads like a short strand, bridges holes like a long strand• Completely Water Proof• Will not sag on vertical surfaces• Compatible with fiberglass and most plastics• Expands and contracts the same as fiberglass and plastics• Won’t “Bullseye”• Tack-free and bleed-through resistant• Superior adhesion to metal, plastics, aluminum, galvanized• Easy to spread and sand• Can be wet or dry sanded and directly top coated 20 minutes Hardener Included