Skip to content Skip to navigation menu
Live Chat

MARYKATE
On and Off GEL Hull/Bottom Cleaner

$21.99

Add to My List
Hazard Shipping – Ships ground in U.S. Lower 48.
In stock online.
Model # 8466468 | Mfg # MK3532

Product Description

Unique viscous formula clings to the surface to break down tough grease and oil and remove stubborn scum lines and rust stains

Bold, blue color makes it easy to see where the product has been applied. Just brush it on, rinse it off.

  • Fresh scent
  • Safe on gel coat
  • 32 fl oz.

Specs

On and Off GEL Hull/Bottom Cleaner

Best Use Cuts Oil/Grease
Stain Removal
Capacity Quart
Features Biodegradable

REVIEW SNAPSHOT®

by PowerReviews
Marykate On and Off GEL Hull/Bottom Cleaner
 
4.1

(based on 17 reviews)

Ratings Distribution

  • 5 Stars

     

    (9)

  • 4 Stars

     

    (5)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (2)

82%

of respondents would recommend this to a friend.

Pros

  • Easy to use (8)

Cons

  • Doesn't work (3)

Best Uses

  • Outdoors (7)
    • Reviewer Profile:
    • Casual/ recreational (8), Advanced (4), Quality oriented (4)
    • Primary use:
    • Personal (4)
    • Was this a gift?:
    • No (9)

Most Liked Positive Review

 

This One Works As Advertised

Left boat in saltwater a bit too long. Many little barnacles, critters and scum stuck to bottom and would not wash off. Used this product and a plastic scraper and it took everything...Read complete review

Left boat in saltwater a bit too long. Many little barnacles, critters and scum stuck to bottom and would not wash off. Used this product and a plastic scraper and it took everything off and left the fiberglass looking good as new. Nice thing about this product is, it's a gel and does not drip and run off when you paint it on. It sticks and keeps working until you scrape and rinse it off. A big plus with this product is it removes rust stains very easily.

VS

Most Liked Negative Review

 

Weak product

We had waterline to bottom discoloration from the PWCs sitting on anchor too long. Tried several things I had at home and then called WM for suggestions. They said use On And Off for...Read complete review

We had waterline to bottom discoloration from the PWCs sitting on anchor too long. Tried several things I had at home and then called WM for suggestions. They said use On And Off for easiest results. Two options, the gel and the origional. Dont use the gel if you have stubborn scumlines. They have changed the formula to "smell good". I dont care if the product smells bad I just want it to work. Went back and bought the origional, which smells a lot less fruity but works 20x better.

Reviewed by 17 customers

Displaying reviews 1-10

Back to top

Previous | Next »

 
5.0

This product works very well.

By MLV

from Kemah, TX

About Me Quality Oriented

Verified Buyer

Comments about Marykate On and Off GEL Hull/Bottom Cleaner:

I used this product on my Sea ray 270 Sundeck. The green algae / scum lines came off with little to effort. No scrubbing necessary.

  • Primary use:
  • Personal
 
5.0

Works great

By Sketch

from New Jersey

About Me Quality Oriented

Verified Buyer

Pros

  • Does really work

Cons

  • Chemical will burn skin if not protected

Best Uses

  • Fiberglass cleaner

Comments about Marykate On and Off GEL Hull/Bottom Cleaner:

Really cleans rust, water lines and barnical stains. Boat hull looks brand new.
Would recommend this product

  • Primary use:
  • Personal
 
5.0

works like a charm taking off sludge and grime

By green machine

from Warwick Rhode Island

About Me Quality Oriented

Verified Buyer

Comments about Marykate On and Off GEL Hull/Bottom Cleaner:

Use once a week during fishing season to keep the boat clean

  • Primary use:
  • Personal
 
4.0

This works! Phosphoric Acid.

By Mph

from St. Augustine, FL

About Me Quality Oriented

Verified Buyer

Pros

  • Dissolves hard stains.
  • Does not drip as easily as the pink liquid.
  • whitens badly stained hull.

Cons

  • Acid, can not touch metal! Must wear gloves!
  • Chemical fumes.

Best Uses

  • Bathroom
  • Boat Fiberglass
  • on really tough stains, rust, mildew.

Comments about Marykate On and Off GEL Hull/Bottom Cleaner:

Worked great on boat hull and interior. Also cleaned stained bathtub very well! Blue gel is thin and will still drip but not nearly as bad as the pink liquid regular version. Gel is much better for doing the underside of the hull. This is phosphoric acid though and will immediately react with metals and fabrics. Keep water hose at hand.

  • Primary use:
  • Personal
 
4.0

brush on - spray off

By River Rose

from New York

About Me Beginner

Verified Buyer

Pros

  • Easy to Use

Cons

    Best Uses

    • Outdoor

    Comments about Marykate On and Off GEL Hull/Bottom Cleaner:

    Works well, brush on hull soon as boat is pulled out of the water, scrubbing with soft bristle brush helps, let work for a few minutes, then spray off, I use a pressure washer. A bit pricey, but a little goes along way, I only use it on the stubborn areas. Cleaned very dirty SS prop up to a shine, after my normal spray on hull cleaner barely made a dent.

    • Was this a gift?:
    • No
     
    1.0

    doesn't work on real stains, only light stains

    By rb

    from Lansing, MI

    About Me Casual/ Recreational

    Pros

      Cons

      • Ineffective
      • Messy
      • Not Durable

      Best Uses

        Comments about Marykate On and Off GEL Hull/Bottom Cleaner:

        Just did not work. Ditn't get any of the stains out and will not even touch the real stains nor algie stains

        • Was this a gift?:
        • No
         
        5.0

        I would buy this again-I'm on my 3rd bottle

        By Rick

        from Maine

        About Me Advanced

        Pros

        • Easy to Use

        Cons

          Best Uses

          • Outdoor

          Comments about Marykate On and Off GEL Hull/Bottom Cleaner:

          It says read label carefully believe it-USE EYE PROTECTION-long sleeve shirt-old clothes-chemical resistance gloves- cover trailer- water hose will wash it right off-apply with a paint brush

          • Was this a gift?:
          • No
           
          5.0

          I would buy this product again.

          By Rod

          from Rhode Island

          About Me Casual/ Recreational

          Verified Buyer

          Pros

          • Easy to Use

          Cons

            Best Uses

            • Outdoor

            Comments about Marykate On and Off GEL Hull/Bottom Cleaner:

            I use it weekly to remove scum at the waterline

            • Was this a gift?:
            • No
             
            5.0

            on was rust apply on off,off goes the rust looks new again

            By Rich

            from Sarasota

            About Me Casual/ Recreational

            Verified Buyer

            Pros

              Cons

              • protect hands and eyes

              Best Uses

              • Outdoor

              Comments about Marykate On and Off GEL Hull/Bottom Cleaner:

              Stainless steel looks new now on the boat and the grill looks new too.

              • Was this a gift?:
              • No
               
              5.0

              Does a great job

              By GlennSr.

              from East Brunswick, NJ

              About Me Casual/ Recreational

              Verified Buyer

              Pros

              • Visually Pleasing

              Cons

              • Messy

              Best Uses

              • Outdoor

              Comments about Marykate On and Off GEL Hull/Bottom Cleaner:

              This product is very easy to use and does a very good job. You just spread it on and rinse it off and the stains rinse away too. It is strong stuff so all of the directions need to be followed.

              • Was this a gift?:
              • No

              Displaying reviews 1-10

              Back to top

              Previous | Next »