MK3532 On & Off Gel Hull & Bottom Cleaner, 32 fl oz.

Left my boat in the marina a little too long and when I pulled her on to the trailer; what a mess! My poor Hull was green and covered in tiny barnacles! Pressure washer, industrial cleaners-No dice. Bought this stuff; it’s amazing. The green and yellow stains just go away. Baby barnacles? Rubbed them with a blue Scotch-Brite pad after applying On and Off and the cake right off! You’re not supposed to use it I’m metal but I tried it on the rust stains on my stainless steel trim tabs and they cleaned right up! I made sure that my aluminum trailer was well protected with a plastic sheet. It does burn a bit if it gets on your bare skin (need longer gloves) but wash it off and it’s no big deal. I just don’t know how it clean under the bunks. Looks like I’ll be running two green stripes on my hull!

I have a Small ski boat and did not get the hull cleaned last year. The lake ick on the bottom was like a thin layer of dried cement. Tried toilet bowl cleaner and deck cleaner with no luck. I tried Starbrite Hull Cleaner and A power washer with no luck. Saw this mentioned on a boat blog and tried it. Wow. Wiped it on with a sponge and brush, let it sit for 10 or 15 minutes and what little was still on the boat rinsed off with a hose. There were some spots that needed a second application and a couple needed a little scrubbing. But after 2 hours, the hull was clean and white again. Wish I had tried this first.

Had a utility sink caked on with sediment. Actually consisdered replacing the sink. A friend told me about this. So lathered and spread it on my sink (with a squeegee not my hands!) and 20 minutes later all, I mean all the sediment was gone. The sink was not porcelain, it was one of the cheap plastic ones. ANd it looks brand new now.

The original works a lot better than this gel version. It’s definitely stronger and works faster than this gel.

Tried other products. This is the best.

Cleaned fish guts and scum off boat easily

I bought this thinking it would clean the back and underneath of a white boat. I put it on the back of the boat because I didn’t want to get on my new boat trailer. It did not work as I expected. I thought it would clean the boat and turn it white and it did not.

This product is very powerful and will remove anything down to the gel coat. Within minutes, everything is broken down (to be safe, I use a painting brush to brush the product into the grime). Once it has worked, you rinse off with water.Caution must be used as it cannot come into prolonged contact with paint (you will need to tarp off any exposed parts of your trailer). It will also cause a burning sensation on any exposed skin.So in summary, this will save hours of hard scrubbing. Just use caution when use.(Final note: Do not buy this in advance of use. The shelf life does not seem that long and the chemicals seem to quickly weaken over time. I believe this might explain why some other reviewers said that this did not work. I purchased a bottle in spring and by fall it was nearly worthless.)

The stuff works great, took off mineral stain that I was sure was never coming off. Made my boat look new again

As decribed

What an amazing product, boat bottom looks new.