GRUNT! 16oz Boat Cleaner - Removes Waterline Rust Stains

Maintain the elegance and integrity of your vessel with our 16oz Boat Cleaner, specially formulated to eliminate persistent waterline and rust stains. Crafted with ethanedioic acid, this powerful cleaner ensures a thorough and effective clean for both GRP and painted boat exteriors, keeping your boat looking pristine.

Features

• Removes yellow and brown waterline stains, scum, and rust marks
• Long-lasting formula with a shelf life of 24 months at 23°C

Specifications

pH Value	1.0
Size	16oz bottle
Application Methods	Brush recommended, but cotton, rag, or sponge can also be used
Mixing Ratio	Single pack

Recommended Use

Perfect for cleaning waterline stains and rust marks on GRP and painted surfaces, our boat cleaner restores your vessel’s appearance without damaging the underlying materials.

Surface Preparation

Apply the cleaner directly to the stained area using a brush, cotton, rag, or sponge. Allow it to work for up to 10 minutes, then rinse thoroughly with fresh water using a sponge for best results.

Pre-treatment

For optimal cleaning performance, ensure the area is pre-treated by cleaning with a suitable detergent before applying the boat cleaner.

Storage Instructions

Store the cleaner in accordance with national regulations. Keep containers in a dry, cool, and well-ventilated space away from heat sources and ignition points. Ensure containers are tightly closed when not in use and handle with care to maintain product integrity.

Download Quick Guide (PDF)

Orders of physical products placed by 3 PM EST M-F typically ships the same day, if all requested items are in stock. Weekend orders will typically ship on Monday.

Shipping takes 2-7 days.

We currently ship to the Contiguous 48 States.

Life of Sailing merch is custom made for the customer after an order is placed. Total turnaround is typically 7-14 days from order to doorstep.