MPEX Fibreglass Filler – Heavy-Duty Reinforced Car Body Filler for Holes, Rust & Struc

MPEX Fibreglass Filler is a high-strength, fibre-reinforced polyester body filler formulated for structural and heavy-duty repairs in automotive bodywork. Designed for applications where standard body filler is not sufficient, it efficiently bridges holes, repairs rusted sections, and reinforces weakened panels with a durable, long-lasting finish.

The fibreglass strand formulation ensures superior strength, excellent adhesion, and resistance to cracking or shrinking, even in areas subject to vibration or stress. Once cured, the filler can be sanded, shaped and overcoated with standard body fillers or finishing putties to achieve a smooth, paint-ready surface.

Ideal for repairing wheel arches, sills, lower door sections, and rust-affected areas, as well as fibreglass/GRP components such as bumpers and body kits.