AMSOIL MP - Heavy Duty Metal Protector

Heavy Duty Metal Protector Made with special rust and corrosion inhibitors. Excellent on metal surfaces, leaves a long-lasting protective coating. Protects against the effects of salt, moisture & chemical corrosion. Works as an undercoat, leaving a wax-like amber film.

SKU: AMH Category: Cleaners and Protectants

Heavy Duty Metal Protector – Great for Undercoating and Provides a Solid Lubricant Layer

Heavy Duty Metal Protector Undercoating Spray A long time customer favorite which has been around forever. Farmers, machinists, mechanics, plumbers and steel workers all find this product invaluable. I use it anywhere you may have tried grease but didn’t want to attract all the dust and dirt. Heavy linkage, hinges and any metal to metal surface can be better protected with AMSOIL Heavy-Duty Metal Protector. Often bought by the case by combine operators. Great on chains, cables, actuators and run of the mill doohickies.

Product Code: AMHSC

Check out the HD Metal Protector data bulletin with rust test results.

Download PDFProduct Datasheet

Order a couple cans and undercoat your car protecting it from rust. Unlike Fluid Flim this product actually dries and makes less mess. (Wear a mask when applying if under car)

Buy & Check Price& Bottle Sizes

Metal Protector – Heavy Duty info:

AMSOIL Heavy Duty Metal Protector often referred to as our undercoating spray, helps protect metal surfaces that require a heavy-duty lubricant or are exposed to the damaging effects of salt, moisture or chemical corrosion. Ideal for hinges, wire ropes and springs, nuts and bolts, motorcycle or bicycle chains, and for undercoating wheel wells and other metal surfaces exposed to water, dirt or road salt.

Corrosion Inhibitor

Contains special rust and corrosion inhibitor additives
Protects against the effects of salt, moisture and chemical corrosion
Leaves a long-lasting (up to several years), protective, wax-like, amber coating
Sprays into hard-to-reach places and works as an undercoat
Ideal for steel, iron, aluminum, brass, copper and other metal surfaces

The three aluminum pieces in the upper left were treated with Heavy-Duty Metal Protector on their lower halves, while the three aluminum pieces in the upper right were untreated. The three steel pieces in the lower left were treated with Heavy-Duty Metal Protector on their lower halves, while the three steel pieces in the lower right were untreated. Following treatment, the pieces were placed in a 5 percent saltwater bath (the same salt and a similar solution to what vehicles and equipment are exposed to on winter roadways) for one hour, removed and allowed to dry for 23 hours. This process was repeated for 10 days. As seen in the pictures, the portions treated with Heavy-Duty Metal Protector show no signs of corrosion.

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Metal Protector Spray Applications

Automotive and trailer undercoat, spare tire carriers, battery terminals, tailgate hinges, handheld tools, snow plows, mower decks and blades, snowblowers, skid-steer attachments, farm machinery, fork lifts, metal gates/fences and much more.

Directions

Shake well before use. Clean target area prior to application. Apply in a uniform and even manner. For precision application, use extension straw. Allow to dry for two hours. For best results, allow to cure for 12 hours. Use AMSOIL Heavy-Duty Degreaser to remove overspray.

Availability

AMSOIL Heavy-Duty Metal Protector is available in 15-oz. spray cans.

Buy & Pricing

Metal Protector Reviews

HD Metal Protector

By JOHN, a Verified Buyer from Arpin, WI on June 02, 2024

Love this stuff !! I spray it on everything underneath. Pickups, trailers, quad axle. Keeps the Wisconsin salt at bay ! Better than tar undercoating because it’s a soft wax like coating you can work with. I freshen the coating every year and my 2011 Chevy 2600 HD has no rust ! Awesome protectant !!

A Must Have When Fighting Corrosion

By MICHAEL, a Verified Buyer from MS Gulf Coast on May 08, 2024

Amsoil’s Heavy Duty Metal Protector simply works. I’ve used it on outdoor equipment, yard decorations, and especially on vehicle undercarriage components. Always a good idea to surface prep first. Highly recommend!

Metal Protection you can see!

By Jim, a Verified Buyer from Oregon on April 17, 2024

I sprayed the heavy-duty metal protection on our son’s swing set two years ago. The waxy coating is still visible, the chains and hinges aren’t rusting, and I can’t imagine a better product for outdoor metal.

Amsoil MP HD Heavy Duty Metal Protector

By MARK, a Verified Buyer from Austin, TX on February 21, 2024

What can I say about this. Nothing bad. It used to be labeled, but not branded as “Motorcycle Chain Lube” in addition to heavy duty metal protector. I can see how this could work well for a motorcycle chain. This dries out to a waxy consistency, like “clean grease”. I use it for garage door tracks, things like that. You spray it on and it does not move much. Dries and you are good to go. I have used it on some old car seat spring assemblies as well, and think that the automakers used something like this for that and seat tracks which I have done as well. Can’t remember the name now, but remember that it is very similar to the stuff the military used to use to store any kind of metal weapon, long term. Starts with a C. This MP HD stuff I believe is the same.

Unreal

By SPC, a Verified Buyer from Chicago Illinois on July 04, 2023

You name it I’ve tried it when it comes to products that claim they prevent rust or stop rust and some are good don’t get me wrong I’m talking major brand names to Independent chemical companies and I figured I’d give Amsoil a try and I literally put it on existing rust and it stopped the rust not for like a week or a month but permanently and I did the underneath of my Toyota 4Runner from front to back and is anybody knows in the Rust Belt most products don’t hold up this not only holds up but I’m just sorry I didn’t find it years ago Amsoil really is the best I admit this is the first product I’ve ever used from them but now that I’ve seen what this can do I’m going to try the other products too.

Superb Protection in salt water

By STEVE, a Verified Buyer from Tarpon Springs on June 30, 2023

Great quality product that protects all of my wave runner’s operating systems and does not easily wear off.

protectant

By CALVIN, a Verified Buyer from S.Fl. on May 25, 2023

This stuff should be mandatory in this humid salty environment. It works great.

Great Product

By MARK, a Verified Buyer from New England on October 06, 2023

Purchased this as an alternative to another product I have used for some time. The MPhd covers better and, more importantly, has staying power. finish is very durable so far.

MP-HD PROTECTOR

By JOHN, a Verified Buyer from Long Island on January 14, 2023

Great product it works great for keeping rust off of my tools in my garage .also use it under my lawn mower decking to stop rust and to keep the grass from sticking I highly recommend this product

Fantastic!

By JOHN, a Verified Buyer from Oregon on September 08, 2022

HDMP has been a necessity in my shop for decades. It gets used as chain lube, protection from the elements on my little sawmill, hinge lube on every vehicle, on and on. Just a super useful product! Feel sorry for anyone who doesnt have a can.

Great product

By Jon, a Verified Buyer from NY on May 02, 2022

My main use for this product is vehicle undercoating. It works great at protecting everything on the chassis, including subframes, suspension components, hardware, brake calipers & shields. I also use it to protect vulnerable body panels – especially inside the quarter panels and lower sections of the doors. I reapply every year or two, more often to high exposure areas. It’s helped my 12 year old car hold up well against harsh winter salt. Amsoil HDMP is a good value compared to similar products and the extension straw is nice for tight spaces.

Order Line – 800-579-0580

AMSOIL MP – Heavy Duty Metal Protector