Koch Chemie Hull PreCleaner Acid Hac - Nautical Acid Pre-Wash 1L

€35,42 €28,33

Delivery between 06 June and 08 June

€35,42 €28,33

Concentrated Acid Pre-Cleaner for Marine Use

Removes Rust Stains and Waterline

Brown stains, mineral deposits and the typical waterline of boats stationary in a marina disappear in minutes without you having to polish.

Brace Yourself for What's Next

Instead of masking heavy grime beneath polish or sealant, you're leaving the surface clean so that those steps last longer and are better applied.

Concentrate That You Adapt to the Condition of the Hoof

For heavy soiling, use undiluted; for maintenance between seasons, dilute up to 1:10. The same bottle serves for extreme cases and routine work.

Koch Chemie Maritima Hac PreCleaner Acid Hac – Concentrated Acid Pre-Cleaner for Hulls and Decks

Highly concentrated pre-cleaner for hull, deck and waterline areas. Combines mild acids with surfactants to dissolve limescale, rust and heavy soiling. Compatible with gelcoat, marine paint, exterior plastics and stainless steel.

  • Dilute up to 1:10 or use undiluted for heavy soiling
  • Contact time 3 to 5 minutes, do not allow to dry
  • Do not use on natural wood, aluminum or galvanized steel
  • 1 L packaging

How to Use

Step 1

Wet the hoof thoroughly with clean water to lower its temperature and wash away loose dirt before applying the product.

Step 2

Apply diluted up to 1:10 or neat with an acid-resistant sprayer or sponge

Step 3

Allow to act for 3 to 5 minutes per section, without allowing it to dry in the sun or on the surface.

Step 4

Wash thoroughly with water and a sponge, repeat if there are areas with persistent stains.

Preguntas frecuentes

It works on accumulated limestone, rust stains caused by rusty supports or screws, the waterline on hulls stopped in marinas, and mineral deposits that are difficult to remove with neutral shampoo or mild acid.

No. The acid formulation attacks aluminium and galvanised steel, and can leave permanent stains or corrode the part. Insulate these areas with tape or plastic before applying and rinse thoroughly if there are accidental splashes.

Not compatible with natural wood. On boats with teak, insulate the deck before applying and keep the product restricted to the hull, gelcoat, and exterior plastics. For cleaning teak, use products specifically designed for that wood.

Yes, all orders include a tracking number which will be emailed to you after the order has been shipped.

You can return it up to 14 days after receiving it at home. The product must be returned in its original condition, unused, and in its original packaging.