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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

Add to My List
On & Off Hull/Bottom Cleaner - Quart 127961 MK2032
In stock online.

$19.99

Add to My List

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
MarykateOn & Off Hull/Bottom Cleaner
 
4.8

(based on 69 reviews)

Ratings Distribution

  • 5 Stars

     

    (62)

  • 4 Stars

     

    (3)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (2)

96%

of respondents would recommend this to a friend.

Pros

  • Easy to use (55)
  • Effective (35)
  • Stores easily (8)
  • Well built / quality (6)
  • Visually pleasing (5)

Cons

  • Doesn't work (3)

Best Uses

  • Outdoors (8)
  • Boat hull (3)
    • Reviewer Profile:
    • Midrange shopper (15), Budget shopper (14), Casual/ recreational (13), Advanced (9), High-end shopper (6)
    • Primary use:
    • Personal (38)

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 69 customers

Displaying reviews 1-10

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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
                   
                  5.0

                  Great product

                  By My Detail Guys

                  from Fort Worth,Tx.

                  Verified Buyer

                  Pros

                  • Easy To Use

                  Cons

                    Best Uses

                      Comments about On & Off Hull/Bottom Cleaner:

                      We own a marine detailing business we use this product to cleaned algy of hull

                       
                      5.0

                      This is a great product and I recommend it to everyone.

                      By Running Coon

                      from Montegut, LA

                      Verified Buyer

                      Pros

                      • Easy To Use
                      • Works Effectively

                      Cons

                        Best Uses

                          Comments about On & Off Hull/Bottom Cleaner:

                          I use the product on my boat and it makes it new.

                          • Primary use:
                          • Business
                           
                          5.0

                          The only product that will remove water line stains.

                          By Bob

                          from Sautee Nacoochee, Georgia

                          Verified Buyer

                          Comments about On & Off Hull/Bottom Cleaner:

                          Use the product to clean waterline stains on my sailboat.

                          • Primary use:
                          • Personal
                           
                          5.0

                          Product works great.

                          By Brian

                          from Grand Ledge, MI

                          About Me High-end Shopper

                          Verified Buyer

                          Pros

                          • Easy To Use

                          Cons

                            Best Uses

                              Comments about On & Off Hull/Bottom Cleaner:

                              Great Product

                              • Primary use:
                              • Personal

                              Displaying reviews 1-10

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