Deck N Hull Cleaner is a phosphoric acid boat cleaner that lifts waterline staining and rust marks from fibreglass and 2 pac hulls, in 1L, 5L and 20L.

What it does

A dilutable acid cleaner that shifts the brown waterline and rust staining a normal boat wash leaves on fibreglass and 2 pac. Sierra adds that it revives fibreglass gone yellow or chalky, and handles stained steel and timber too. Per the SDS it holds over 40 per cent orthophosphoric acid with under 3 per cent surfactant, and it is a clear blue, odourless liquid at about pH 1 with a specific gravity of 1.38.

Where to use it

Hulls, transoms and decks, from trailer boats to moored vessels. Apply it with an acid rated sprayer such as the IK Multi Pro 2 Sprayer 1L. For general marine soiling there is Sierra's Deck Wash Acid. More in Detailing and Car Care.

How to use

1. Check the label for the dilution rate, as Sierra's catalogue gives none.
2. Put on full acid PPE before you mix.
3. Apply the diluted cleaner to the stained area.
4. Rinse the surface and anything nearby thoroughly with fresh water.

Safe on / avoid

Made for fibreglass and 2 pac, and suits stained steel and timber. The SDS warns it can corrode metals and react with them to give off flammable hydrogen, and lists glass, alloys, natural rubber and leather as incompatible, so mask or rinse those quickly. Test a hidden spot on gelcoat first. Read the Safety Data Sheet before use.

Specifications

Pack sizes and delivery

1L, 5L Jerry Can and 20L Drum. The 1L comes in lots of 12 and the 5L in lots of 4. Freight is quoted to your postcode at checkout. Dangerous goods freight applies.