Tetrosyl Fibre Filler 2K Fibrofil 2L. This polyester body filler is reinforced with glass-fibre strands and can be used to fill small holes or rips in vehicle bodies. It forms a strong, hard repair. Sandable and over-coatable with conventional body filler. Remains waterproof, durable and retains its adhesion over time.High adhesion to a wide range of substrates e.g. steel, coated steel, aluminium and GRP. Color Cure 2K Fibrofil, guide colour yellow, is a tough bodyfiller reinforced with glass fibre to give a solid and vibration resistant repair. Comes in a 2 litre container including filler/hardener.