Marine Cloth Top Cleaning

SeaMark Marine Topping

Haartz marine topping  fabric does not promote mildew growth by itself, mildew may develop on dirt and other foreign substances that are not removed. This is especially true in warm, humid, dark environments. A program of keeping the fabric clean through regular washings, before it gets dirty, will enhance the life and beauty of the acrylic and make successive cleaning easier. A first stop for information specific to your top's cleaning can be found in the owner's manual In addition, Haartz makes the following recommendations.

The Haartz Corporation recommends using BIMINI TOPP Marine Cleaner, the RAGGTOPP Premium Convertible Top Brush, and BIMINI TOPP Marine Protectant. These products can be ordered by calling Wolfsteins Pro-Series at 800-377-4700 or e-mailing

Avoid direct sunlight when hand washing the topping material. Avoid using detergent on the top material. Bird and tree droppings, as well as other loose particle soils, should be removed immediately. Vacuum with a brush attachment and rinse thoroughly with water to remove. This will prevent the soils from being redeposited during cleaning. Once the fabric has been rinsed thoroughly, spray BIMINI TOPP Marine Cleaner* evenly over the entire surface while still wet. Allow the cleaner to soak for 10 to 20 minutes and then scrub lightly with the RAGGTOPP Premium Convertible Top Brush, a soft nylon brush, or a terry cloth rag. Rinse thoroughly, preferably until no remaining soap foam is observed. Additional cleanings may be required. It is best to determine the need for additional cleanings after the fabric has dried completely. 

For more stubborn cases, mix a solution of no more than 1/2 cup (4 oz / 120ml.) bleach (5-8% Sodium Hypochlorite;Clorox/Dan Klorix brand or similar) and 1/4 cup (2 oz. / 60ml) BIMINI TOPP Marine Cleaner per gallon of (3.8 liter) water, soak for approximately 20 minutes and scrub lightly as indicated above. Excessive soaking with the bleach solution can deteriorate seam threads. Rinse thoroughly to prevent streaking on painted and chrome surfaces. Several cleanings may be necessary. 

Once dry, cleaning must be followed be water repelling with BIMINI TOPP Marine Protectant.  (This product does not contain CFCs and is not harmful to the environment). Failure to apply will result in rapid resoiling of the unprotected fabric. 


For ordering information contact

The new RAGGTOPP Premium Convertible Top Brush​ can be ordered online at 

SeaMark is a trademark of The Haartz Corporation
BIMINI TOPP is a trademark of Wolfsteins Pro-Series

Marine Cloth Top Cleaning Guide, Bimini Topp










*Washing with soap (ie. Ivory or Lux) and warm water is a safe alternative to BIMINI TOPP Marine Cleaner, but not as effective.



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