GRUNT! Boat Cleaner

Grunt Boat Cleaner is a brilliant cleaner and stain remover that works well on fibreglass boats and most two-part marine paint systems and yacht enamels. It removes yellow/brown waterline stains, rust stains from fittings, bird lime, limescale, deeply ingrained dirt and grime, and ...Grunt Boat Cleaner is a brilliant cleaner and stain remover that works well on fibreglass boats and most two-part marine paint systems and yacht enamels. It removes yellow/brown waterline stains, rust stains from fittings, bird lime, limescale, deeply ingrained dirt and grime, and general yellow discolouration.

The cleaner penetrates into the gelcoat pores and neutralises and absorbs the staining without affecting the gelcoat. The stain can then be easily washed away with a sponge and water. To use, apply to the stained area, ideally with a brush, and wait for 30 minutes.

Then, rinse the area with water and a sponge.