Heavy Duty Hull and Bottom Cleaner is a heavy-duty acid cleaner for fiberglass boats. Works instantly to remove waterline stains, algae, rust, and gas exhaust stains for fiberglass use only.  Available in regular and extra-strength formulas and will not harm gel coat.

  • Removes Algae & Rust
  • Removes Gas Exhaust
  • Removes Waterline Stains

*special shipping and handling required*



Protective clothing, gloves and eye protection should be worn when using or handling this product. Protect boat trailers with plastic drop cloth. Apply full strength with brush or sponge, then hose off with water. Collect and dispose of rinse water in accordance with local, state, and federal regulations. This product is biodegradable. Will not harm gelcoat.

PRECAUTIONS (Storage & Handling): Put on appropriate personal protective equipment. Avoid contact with eyes, skin and clothing. Do not breathe vapor or mist. Use only with adequate ventilation. Do not ingest. Do not reuse container. Store in original container protected from direct sunlight in a dry, cool and well-ventilated area, away from incompatible materials, food and drink. Keep container tightly closed and sealed until ready for use. Wash thoroughly after handling.

FIRST AID: EYE: Irrigate immediately with copious amounts of water for about 15 minutes. Eyelids should be held apart during irrigation to insure contact of water with all tissues of the eyes and lids. A physician, preferably an eye specialist, should be contacted. SKIN: Immediately subject affected area with drenching shower of water and remove contaminated clothing as rapidly as possible. An iced 70% solution of alcohol or an ice cold saturated solution of magnesium sulfate (Epsom salts) should be applied for at least 30 minutes by direct immersion or by a freshly prepared paste of powdered U.S.P. Magnesium Oxide and U.S.P. Glycerin. INHALATION: Remove patient to an uncontaminated area and apply artificial respiration if breathing has stopped. Patient should remain quiet, preferably lying down and kept warm and comfortable. Do not give stimulants unless so ordered by a doctor. INGESTION: DO NOT INDUCE VOMITING. Contact a physician immediately. Have patient drink a large quantity of water, followed by milk or 2 ounces of Milk of Magnesia. See also "First Aid for Inhalation" KEEP OUT OF REACH OF CHILDREN

Available in:

1 gallon 5 gallon 30 gallon 55 gallon