Bonda V11 Filler - Glass Fibre Reinforced - Rapid Hardening - 400G

The pot life is typically very short, around 3-5 minutes at room temperature, due to its rapid hardening formulation. Work quickly once mixed.

While it's designed for metal and fibreglass, it may adhere to some rigid plastics after proper surface preparation (sanding and priming). However, dedicated plastic fillers are often a better choice for flexible plastic parts.

It can be sanded after approximately 20-30 minutes, depending on temperature and application thickness. It becomes very hard, so use sharp sanding tools.

When stored correctly in a sealed container in a cool, dry place, the filler typically has a shelf life of over a year. Check the packaging for specific dates.

Yes, after sanding and cleaning the cured filler, it is recommended to apply a suitable primer before applying paint for best results and adhesion.

For larger holes, it's recommended to use a backing mesh or material to provide support and prevent the filler from sagging before it cures. Apply in layers.

Ensure the correct ratio of filler to hardener was used. Check that the hardener is not expired. Ensure adequate ambient temperature (avoid extremely cold conditions).

You may have used too much hardener, or the mixing process generated excessive heat. Reduce the amount of hardener in future mixes and mix quickly.

The repair surface may not have been properly cleaned, degreased, or sanded. Ensure all dirt, rust, and old paint are removed and the surface is abraded.

This can occur if the filler was applied too thickly in one coat or if the underlying surface is unstable. Apply in thinner layers, allowing each to partially cure, or use a backing material for larger holes.