Skip to content Skip to navigation menu
Live Chat

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 67 reviews)

Ratings Distribution

  • 5 Stars

     

    (60)

  • 4 Stars

     

    (3)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (2)

95%

of respondents would recommend this to a friend.

Pros

  • Easy to use (54)
  • Effective (33)
  • Stores easily (8)
  • Well built / quality (6)
  • Visually pleasing (5)

Cons

  • Doesn't work (3)

Best Uses

  • Outdoors (8)
  • Boat hull (3)
    • Reviewer Profile:
    • Budget shopper (14), Midrange shopper (14), Casual/ recreational (13), Advanced (9), High-end shopper (5)
    • Primary use:
    • Personal (36)

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 67 customers

Displaying reviews 1-10

Back to top

Previous | Next »

(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
                         
                        4.0

                        I buy product year

                        By Captain Amanda

                        from Sound Beach

                        Verified Buyer

                        Pros

                        • Easy To Use
                        • Works Effectively

                        Cons

                          Best Uses

                            Comments about On & Off Hull/Bottom Cleaner:

                            I use it to remove scum and barnacles off the hull of my boat. Works better than any other product ive found

                            Service and delivery comments:

                            Service was great

                            • Primary use:
                            • Personal
                             
                            5.0

                            I will buy this product forever and refere it to anyone

                            By Rye bread

                            from N. Falmouth, Ma

                            About Me Budget Shopper

                            Verified Buyer

                            Pros

                            • Easy To Use
                            • Has many applications
                            • Stores Easily
                            • Works Effectively

                            Cons

                            • No negatives

                            Best Uses

                            • On all fiberglass surfaces

                            Comments about On & Off Hull/Bottom Cleaner:

                            Great product to remove hull discoloration. This year learned it removes Oak leave stains. Easy to use. Makes fiberglass look like new.

                            • Primary use:
                            • Personal

                            Displaying reviews 1-10

                            Back to top

                            Previous | Next »