Cleans, brightens, and dissolves algae, rust, and mildew stains. For boat bottoms, teak and more. Increases boat performance. Made in Canada. Simply add to water, apply and hose off. 450g size makes up to 20L.

Directions: 

add 50g (two capfuls) to each 1L of warm water. Brush on. Allow to penetrate stains but not to dry. Rinse off.