






💦 Spotless shine, zero hassle—your boat and RV’s new best friend!
Meguiar's Marine/RV Hard Water Spot Remover M4716 is a professional-grade spray formula designed to quickly and safely dissolve hard-water mineral deposits on boats and RVs. Its thick, low-drip consistency clings to vertical surfaces for easy application without excessive wiping. Beyond removal, it provides ongoing protection against future water spots, making it an essential product for maintaining deep gloss and hydrophobic surfaces. Trusted for over a century, Meguiar’s delivers a powerful, convenient solution that saves time and elevates your vehicle’s appearance.

























| ASIN | B0000AY3TA |
| Best Sellers Rank | #7,211 in Automotive ( See Top 100 in Automotive ) #196 in Engine & Parts Fluid Cleaners #272 in Cleaners |
| Customer Reviews | 4.5 4.5 out of 5 stars (4,077) |
| Date First Available | July 29, 2008 |
| Department | unisex-adult |
| Is Discontinued By Manufacturer | No |
| Item model number | M4716 |
| Manufacturer | Meguiar's |
| Product Dimensions | 6 x 8.5 x 11 inches; 1.2 Pounds |
J**.
Life Changing Stuff
Let me first say, this is incredible stuff and priced amazingly, don't have second thoughts on purchasing it. For background, I'm a professional detailer with a small business, I have detailed well over 200 cars and tried hundreds of products on the market. I was hired to wash, clay, and wax a Newmar 45' motorhome. I knew it was a MUST to find something easy to apply but still provides great protection, I would never recommend spray wax for long term protection. I came upon this stuff and it was advertised to do exactly what I needed. I purchased 6 bottles (only ended up using a single bottle for this 45' long by 14' tall monster. So it goes a really long way. My biggest concern was ease of application and removal, a lot of products I use on normal cars would have taken years to apply to this job. I can very happily say that this was the best tool for the job, and an absolute must have for cars or motorhomes. This works great on regular automotive paint as its a carnuba based wax. I was able to apply it by hand to very large areas and then simply 1 wipe buffs it off once it has flashed on. The work time is great and you could let it sit for hours on the paint before you buff it off and itd still be fine. Made this job a breeze, not to mention it brings out DEEP gloss and reflection and has great hyrdophobic properties. I highly recommend this product and plan to use on my own vehicles.
T**T
What a shine
It easily puts a beautiful deep shine that lasts all year. Simple to use, much better and easier to apply then paste waxes. I wax two vehicles , a midnight blue pickup and an urban grey suv. Different colors with the same outstanding results.
E**S
Works for an easy protection, does not clean much
Despite being advertised as a cleaner wax, this did very little cleaning. For water marks, etc, I had to use my auto Mother's cleaner/wax. However this product went one easy and buffed off easy. I think it is good for use between more significant wax jobs (which I do 1-2 per year in my RV).
G**M
Works great.
Great product. A little pricey wish it was cheaper.
J**E
Great product.
Used this to wax our boat this spring. It went on easily and wiped out easily. Left a beautiful shine.
C**Y
Save yourself the elbow grease of failed attempts and products and just buy this first.
Boat motors had been neglected for a couple of years and wanted them to look better. I didn’t get pictures but my motor looks new again. Kinda on the pricey side as I used almost the whole bottle between my main motor and my kicker. But then again what isn’t expensive anymore. I would recommend and buy again. Worked really well when multiple other attempts and products failed to even touch the water spots. It even took the thick hard water build up off of the bottom drive unit. This is the thicker stuff and it did take a little bit of elbow grease but it was still less than all of my other attempts combined.
J**O
Good quality product
I always used 3M product and decided to give McGuire wax a chance, it resulted a very good quality product, easy to put on and easy to wax off with a beautiful results for much less money.
J**M
Disappointed in the RV Products
I love Mequiar's car products but have been very disappointed in their RV products. While this does remove some oxidation it leaves a film you can see, no make how much you buff it. I was using a electric buffer with it.
P**C
I had a fiberglass tub repaired for a few small hairline cracks in the corners. Unfortunately, the repair guy finished with a dull white spray coat that looked rough and clearly noticeable. The surface was matte, uneven, and didn’t blend with the rest of the tub at all. I decided to fix it myself and used 800-grit wet sandpaper to smooth everything down, then followed with Meguiar’s M105, M205, and finally M5616 wax. The transformation was incredible. The repaired area became perfectly smooth and glossy again — I literally can’t tell where the repair was. When I shine a light on it, it reflects just like the untouched, brand-new parts of the tub. These Meguiar’s products made the surface look professionally finished and completely restored the shine. Highly recommend for anyone needing to polish out fiberglass or gelcoat repairs!
A**I
Ottimo rapporto qualità prezzo
B**H
A very good product , but will take time for the results!
K**E
Mon camping car a retrouvé son brillant...
I**N
All good
Trustpilot
3 days ago
2 days ago