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MARYKATE
On & Off Hull/Bottom Cleaner

Powerful cleaner

Removes waterline, rust and scum. Won't harm fiberglass. Brush-on/rinse-off, biodegradable formula.
  • Quart or gallon
Product Models
Description WM Model # MFG Part # Availability Price Quantity  
On & Off Hull/Bottom Cleaner - Gallon 127979 MK20128
In stock online.

$59.99

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On & Off Hull/Bottom Cleaner - Quart 127961 MK2032
In stock online.

$19.99

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Product Description

Powerful cleaner

Removes waterline, rust and scum. Won't harm fiberglass. Brush-on/rinse-off, biodegradable formula.
  • Quart or gallon

Specs

REVIEW SNAPSHOT®

by PowerReviews
 
4.8

(based on 73 reviews)

Ratings Distribution

  • 5 Stars

     

    (64)

  • 4 Stars

     

    (5)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (2)

96%

of respondents would recommend this to a friend.

Pros

  • Easy to use (59)
  • Effective (38)
  • Stores easily (10)
  • Well built / quality (7)
  • Visually pleasing (5)

Cons

  • Doesn't work (3)

Best Uses

  • Outdoors (8)
  • Boat hull (3)
    • Reviewer Profile:
    • Midrange shopper (17), Budget shopper (15), Casual/ recreational (13), Advanced (9), High-end shopper (6)
    • Primary use:
    • Personal (41)

Most Liked Positive Review

 

I have bought this product numerous times and I love it

This product can put you in the hospital if you do not use it properly make sure you are in a well ventilated area wearing and M 95 mask. If you try to use...Read complete review

This product can put you in the hospital if you do not use it properly make sure you are in a well ventilated area wearing and M 95 mask. If you try to use it without a mask in a closed garage you will burn your lungs

VS

Most Liked Negative Review

 

Bad Bottle??

Purchased On and Off on recommendation of West Marine. Was assured it would "instantly" remove everything from barnacle cement to waterline stains. It did neither. Made NO DIFFERENCE whatsoever on...Read complete review

Purchased On and Off on recommendation of West Marine. Was assured it would "instantly" remove everything from barnacle cement to waterline stains. It did neither. Made NO DIFFERENCE whatsoever on any stain! Will try to get refund from WM.

Reviewed by 73 customers

Displaying reviews 1-10

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5.0

Works as advertised. Makes cleaning the boat very easy

By Jam

from Georgia

Verified Buyer

Pros

  • Easy To Use

Cons

    Best Uses

      Comments about On & Off Hull/Bottom Cleaner:

      Works great and very easy to use.

       
      4.0

      The name says it all. Brush it on, stain is gone.

      By Rollin Rock

      from Chestertown, MD

      About Me Budget Shopper

      Verified Buyer

      Pros

      • Easy To Use
      • Stores Easily
      • Works Effectively

      Cons

        Best Uses

          Comments about On & Off Hull/Bottom Cleaner:

          Even right after a complete wax job, the Chesapeake Bay Tannin stains the hull brown. Washing will not take it off. The only other option is to buff the hull completely and rewax, a day's worth of work. A dilute solution of ON & OFF brushed on the hull removes the stain in seconds, a day's work reduced to 5 minutes.

          • Primary use:
          • Personal
           
          4.0

          Stains go away easy

          By The Islander

          from Merritt Island, FL

          About Me Midrange Shopper

          Verified Buyer

          Pros

          • Easy To Use
          • Works Effectively

          Cons

            Best Uses

              Comments about On & Off Hull/Bottom Cleaner:

              Dilute 1 to 10 water and it works just fine.

              • Primary use:
              • Personal
               
              5.0

              absolutely recommend this product

              By bartles

              from Stuart, Fl

              About Me Midrange Shopper

              Verified Buyer

              Pros

              • Easy To Use
              • Quality Construction
              • Stores Easily
              • Works Effectively

              Cons

              • none

              Best Uses

              • boat deck - easily brought back original white

              Comments about On & Off Hull/Bottom Cleaner:

              best product I've found to clean an old boat deck without damaging the gelcoat.

              • Primary use:
              • Personal
               
              5.0

              Worked as claimed

              By Bill

              from Florida

              About Me Midrange Shopper

              Verified Buyer

              Pros

              • Works Effectively

              Cons

                Best Uses

                  Comments about On & Off Hull/Bottom Cleaner:

                  Took the yellow stains off the non-skid deck with ease. Remember that this is an acid based product so you need to be careful when applying. Follow the directions and this product works with little effort.

                  • Primary use:
                  • Personal
                   
                  5.0

                  Name says it all!

                  By RW

                  from Westerly RI

                  About Me High-end Shopper

                  Verified Buyer

                  Pros

                  • Easy To Use
                  • Works Effectively

                  Cons

                    Best Uses

                    • Boat waterline scum

                    Comments about On & Off Hull/Bottom Cleaner:

                    Works very well when cleaning any discoloration from the hull. If using out of the water, wet down the bottom to prevent run marks.

                    • Primary use:
                    • Personal

                    (1 of 1 customers found this review helpful)

                     
                    5.0

                    Awesome, but use sparingly

                    By Scouseusa

                    from Mi

                    About Me Budget Shopper

                    Verified Buyer

                    Pros

                    • Easy To Use
                    • Works Effectively

                    Cons

                      Best Uses

                        Comments about On & Off Hull/Bottom Cleaner:

                        I use this product every couple of years to clean the streaks and other nasty stuff off my boat hull. You have to be careful with this cleaner, it's an acid wash, so follow the instructions, don't leave it on long, wash it off thoroughly and wear skin protection. But it is the best cleaner I have found. My old boat looks like new again

                        • Primary use:
                        • Personal

                        (1 of 1 customers found this review helpful)

                         
                        5.0

                        Easy to use

                        By John

                        from Silverdale , EA

                        About Me Midrange Shopper

                        Verified Buyer

                        Pros

                        • Easy To Use
                        • Works Effectively

                        Cons

                          Best Uses

                            Comments about On & Off Hull/Bottom Cleaner:

                            follow the directions, use protection

                            • Primary use:
                            • Personal
                             
                            5.0

                            Works great!

                            By Capt. Tom

                            from Belmar, NJ

                            Verified Buyer

                            Pros

                            • Easy To Use
                            • Works Effectively

                            Cons

                              Best Uses

                              • Unpainted Hull

                              Comments about On & Off Hull/Bottom Cleaner:

                              Knocks stain and scum right off - spray on - let set a few minutes - hose it off... be prepared to re-apply wax as that is removed as well.

                              • Primary use:
                              • Personal

                              (1 of 1 customers found this review helpful)

                               
                              5.0

                              Great product

                              By Sea Hawk

                              from Delay Beach Florida

                              About Me Midrange Shopper

                              Verified Buyer

                              Comments about On & Off Hull/Bottom Cleaner:

                              I have oak tree leafs and pollen that cover and stain my boat regularly. I've tried everything to get them off. A little on off and light brushing and the stains are gone and my boat looks new!

                              • Primary use:
                              • Personal

                              Displaying reviews 1-10

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