Algae Strip The toughest, most efficient algae, mussel and barnacle remover available!! Why You'll Love It... Easy to Use. Wipe On. Rinse clean. H.D. Industrial Strength so it works quickly Will not harm fiberglass Works chemically - no scrubbing Contains Optical Brighteners for a cleaner, brighter boat. Inhibited Formula. Will not cause stress cracks or blisters Available in Industrial quantity Satisfaction Guaranteed. Rated "Best" - Practical Sailor & Powerboat Reports