On Off Hull Cleaner
Marykate On Off Hull and Bottom Cleaner
  • On Off Hull Cleaner

On-Off Hull and Bottom Cleaner

Use On-Off Hull and Bottom Cleaner to remove waterline stains, algae stains, rust and gas exhaust stains from your boat's bottom and hull areas instantly. Softens barnacle rings & zebra mussels for easy removal. Will not harm fiberglass. Brush on, rinse off. Biodegradable formula.
 
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Tech Spec Product Info User Generated Content
BRAND: Marykate
Type: Hull and Bottom Cleaners
4.4 18

REVIEW SNAPSHOT®

by PowerReviews
MarykateOn-Off Hull and Bottom Cleaner
 
4.4

(based on 18 reviews)

Ratings Distribution

  • 5 Stars

     

    (12)

  • 4 Stars

     

    (3)

  • 3 Stars

     

    (2)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (0)

94%

of respondents would recommend this to a friend.

Pros

    Cons

    • Strong odor (11)
    • Not pet safe (3)

    Best Uses

        • Reviewer Profile:
        • Quality oriented (14), Budget shopper (3)
        • Primary use:
        • Personal (16)

      Most Liked Positive Review

       

      excellent hull cleaner!!!!!!

      I moor my boat in saltwater so you can imagine what the hull looks like after the summer.I use to use soft scrub w/bleach took me 2-hrs to do my 21 ft...Read complete review

      I moor my boat in saltwater so you can imagine what the hull looks like after the summer.I use to use soft scrub w/bleach took me 2-hrs to do my 21 ft boat,I applied this with a paint brush let it sit for 60 sec...GONE..took 30 min.to do,and no sore muscles.This stuff is great.

      VS

      Most Liked Negative Review

       

      Works great, but scary

      This product really does work as advertised. I will find another product though that has less toxic chemicals. The smell and vapors scared me. The warnings all say not to let this product...Read complete review

      This product really does work as advertised. I will find another product though that has less toxic chemicals. The smell and vapors scared me. The warnings all say not to let this product get into the water supply. Barring a recovery system, that's impossible. This stuff is too scary to use in good conscience.

      Reviewed by 18 customers

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      Displaying reviews 1-10

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      5.0

      a must for all boatowners

      By jp

      from chillicothe,ohio

      About Me Quality Oriented

      Verified Buyer
      Ensign

      Pros

      • Easy to apply
      • Easy To Remove

      Cons

      • Strong Odor

      Best Uses

      • Boat Bottoms

      Comments about Marykate On-Off Hull and Bottom Cleaner:

      have tried 3 other products befor this. none worked. this product is great

      • Primary use:
      • Personal
       
      5.0

      Does the job!

      By Bird

      from New jersey

      About Me Quality Oriented

      Pros

      • Better Than Anything Else

      Cons

      • Use With Caution

      Best Uses

      • Swim Decks Boat Bottoms

      Comments about Marykate On-Off Hull and Bottom Cleaner:

      Great product but not to be handled by those who are careless
      I and many others I have known have used this product with excellent results
      Makes stains disappear immediately .
      Very strong ,has an odor but I can deal with it for the results it provides

      • Primary use:
      • Personal
       
      4.0

      Best I've used!

      By Captain of Shameless

      from Eugene, OR

      About Me Quality Oriented

      Verified Reviewer

      Pros

      • Multi-Use

      Cons

      • Strong Odor

      Best Uses

        Comments about Marykate On-Off Hull and Bottom Cleaner:

        I have used On-Off to clean the entire hull and fiberglass decks. After long mooring times the hull comes clean with almost no effort. I wipe it on using a brush full strength on a dry hull. Use very small amounts in a pail and dry brush to apply. Let is rest on the hull for a few minutes, not to dry they dip your brush in water and begin to scrub. Add water to keep the area damp. Two or three light strokes and hose it off. Nothing works like On-Off and it's especially great at cleaning tuna blood that has dried on. Excellent for cleaning bilge areas but be careful to keep it off metal, it will remove galvanizing. Most important to use in a very well ventilated area. Not for a careless user.

        • Primary use:
        • Personal

        (1 of 1 customers found this review helpful)

         
        5.0

        AMAZING PRODUCT

        By US Navy Retired

        from Lake Wallenpaupack,Pa

        About Me Quality Oriented

        Pros

        • Product delivers

        Cons

        • Strong Odor

        Best Uses

          Comments about Marykate On-Off Hull and Bottom Cleaner:

          My boat is a 1984 FourWinns(hull color is beige). It is used on a man-made lake in Pa. Every year when it's time to pull her out of the water for the season the hull is the color of dark roast coffee(blackish-brown). Last year when I stored my boat without the usual in-depth winterizing and cleaning I dreaded the spring clean up. This product saved me a week of hard work. Within seconds the hull was clean where ever the product was applied.ON-Off is one AMAZING product.

          • Primary use:
          • Personal

          (1 of 1 customers found this review helpful)

           
          5.0

          Wow!

          By Eric Theune

          from Richmond, va.

          About Me Value Oriented

          Verified Reviewer

          Pros

            Cons

            • Strong Odor

            Best Uses

              Comments about Marykate On-Off Hull and Bottom Cleaner:

              I sprayed this stuff on the bottom of my runabout and that dried on green film that just won't come off literally melted away even before I finished spraying. I then took a long handled soft brush and just washed it around and then rinsed and the bottom was clean as new. This may be the best product I have ever used as far as doing what it says it will do. READ AND FOLLOW THE DIRECTIONS, WEAR GLOVES AND DON'T GET IT ON YOUR SKIN. THIS STUFF IS SERIOUSLY STRONG.

              • Primary use:
              • Personal

              (0 of 1 customers found this review helpful)

               
              5.0

              majic in a bottle

              By lex2003is3

              from new york new york

              About Me Quality Oriented

              Pros

              • Controlled Spray
              • Streak Free Application

              Cons

              • Strong Odor

              Best Uses

                Comments about Marykate On-Off Hull and Bottom Cleaner:

                i tried this stuff out cause my marina told me to i keep my boat docked in fresh water it is not bottom painted just has gel coat and i took the boat out and it was a disaster i thought i would never get it clean i tried using 3m rubbing compound to get it off and even with a buffing wheel and the strong compound it wouldn't budge took off a little but noting near what i wanted the whole bottom was done went to the store picked up a bottom what did i have to lose i sprayed it on the boat whole used windex top to spray it with and all of a sudden i seen smoke after the smoke i just seen the ick running down the hull i sprayed the bottom side the whole hull of the boat within minutes the boat looked like it just came out of the show room compounded and waxed it and wow made my boat look like brand new it burns ur hands so wear gloves you are dealing with acid and try not to breath any fumes in the stuff is strong but it is magic so just be amazed when u go to clean

                • Primary use:
                • Personal

                (1 of 1 customers found this review helpful)

                 
                4.0

                Great Stuff

                By Bill

                from Cape Coral, Fl

                About Me Quality Oriented

                Pros

                • Controlled Spray

                Cons

                • Strong Odor

                Best Uses

                  Comments about Marykate On-Off Hull and Bottom Cleaner:

                  Clean boat hulls. Works great!

                  • Primary use:
                  • Personal

                  (0 of 1 customers found this review helpful)

                   
                  5.0

                  excellent hull cleaner!!!!!!

                  By sharkin jim

                  from cape cod ma.

                  About Me Quality Oriented

                  Verified Reviewer

                  Pros

                  • Multi-Use
                  • This stuff works

                  Cons

                  • Not Pet Safe
                  • Strong Odor

                  Best Uses

                  • Fiberglassvinyl siding

                  Comments about Marykate On-Off Hull and Bottom Cleaner:

                  I moor my boat in saltwater so you can imagine what the hull looks like after the summer.I use to use soft scrub w/bleach took me 2-hrs to do my 21 ft boat,I applied this with a paint brush let it sit for 60 sec...GONE..took 30 min.to do,and no sore muscles.This stuff is great.

                  • Primary use:
                  • Personal
                   
                  5.0

                  This product has worked well for me

                  By Shortline Stout

                  from Kansas

                  About Me Quality Oriented

                  Verified Reviewer

                  Pros

                    Cons

                      Best Uses

                        Comments about Marykate On-Off Hull and Bottom Cleaner:

                        I've used On- Off for many years on my fiberglass/gel coat boat. I'm in staining fresh waters in the Midwest. I wipe my boat down after every use, but staining is still inevitable. I use On-Off to remove this stain once or twice a year. Handle the product with care as directed. I simply sponge it on and rinse immediately. The staining is removed instantly. This must be followed up with a good protective coating, I wax.

                        • Primary use:
                        • Personal

                        (1 of 1 customers found this review helpful)

                         
                        3.0

                        Odor

                        By Restoration Specialist

                        from Ft. Myers, FL

                        Verified Reviewer

                        Pros

                          Cons

                          • Strong Odor

                          Best Uses

                            Comments about Marykate On-Off Hull and Bottom Cleaner:

                            Spray on Boat Hull, Rust Stain, or Organic Stain.

                            Works in seconds without smell or burning!

                            Do not use on glass!!

                            • Primary use:
                            • Business

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