AMSOIL Heavy-Duty Metal Protector

Corrosion Inhibitor

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. **NOT AVAILABLE IN CANADA For the Moment

One of Amsoil’s most versatile products. Penetrates all metal surfaces protecting from the elements while leaving a wax-like lubricating film.

Seals and Lubricates • Heavy-Duty Performance • LOW Cost!

I use it where a grease may attract unwanted dirt. Heavy linkage, door locks (from freezing), etc.

Check Price or Buy

Call 800-579-0580 for competitive current price.
Or use the
online preferred customer portal if you choose to order online.

Farmers often buy this one from me by the case.

Package sizes include:
16-oz. Spray Can
16-oz. Spray Cans (case of 12)
Also: 30 and 55 gallon drums available per request.

Printable Product Data Sheet for AMSOIL Heavy Duty Metal Protector Spray

Complete this form & we’ll mail the Trial Wholesale buying packet & Dealer price list to you. Save 25% on all products.

Vehicle Look-up: Match AMSOIL Products to your model

Exceptional adhesion properties.

**NOT AVAILABLE IN CANADA (please don’t ask why)

  • Contains additives that specifically protect against corrosion
  • Displaces water and seals equipment from water intrusion
  • Leaves a dry, long-lasting (up to several years), wax-like amber film
  • Sprays into hard-to-reach places
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.


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.


Shake well before use. Push down on control at top of can to release spray. Clean target area prior to application. Apply in a uniform and even manner. For precision application, use included extension straw device. Allow to dry for two hours. For best results, allow to cure for 12 hours. Use AMSOIL Heavy-Duty Degreaser to remove overspray.


AMSOIL Heavy-Duty Metal Protector is available in 15-oz. spray cans. It is not available in Canada.


AMSOIL products are backed by a Limited Liability Warranty. For complete information visit


This product is not expected to cause health concerns when used for the intended applications and according to the recommendations in the Safety Data Sheet (SDS). An SDS is available online at or upon request at (715) 392-7101. Keep Out of Reach of Children. Recycle used oil and bottle.



Spray product on area to be treated. For best results, do not wipe off. Film carrier will evaporate, leaving MPHD on treated surface.

*Note: Due to the broad use of this product we will be posting some photos and short videos regarding the use of AMSOIL MPHD. One particular application I am rather fond of is the use on front end steering and suspension parts. When restoring or repairing older vehicle front end parts, it’s important to seal the elements, salt and moisture away from these expensive and critical parts. After painting and/or primer, apply the Amsoil Heavy Duty Metal Protector. Springs, alignment threads, nuts and bolts and exposed areas in the fenders are prime reasons to try AMSOIL MPHD.

We also see it’s a popular product for landscaping tool professionals from numerous posts regarding AMSOIL Metal Protector on the Lawnsite Forum. Prevents grass and debris build-up on mowing decks and other areas where clean-up isn’t always convenient. Also allows snowblowers to chuck snow easier without clumping up.

Lately I have received sales for the “Homebrew” Ham Radio market. the AMSOIL Heavy Duty Metal Protector is great for sealing moisture out from fresh antenna projects or modifications. Keeps wire antennas from oxidizing and solder connections from corroding. Stalls the formation of aluminum oxide at adjustable antenna joints. Keeps water out on those remote DX camping sites when operating in field conditions.

The Tractor Forum – Amsoil Metal protector (MP) has a multitude of uses, I personally use it on my guns as a protector to prevent rust, I also found that when deer or pheasant hunting when temps go below zero MP will not get thick and gummy like Remlube and many of the other gun oils will, thus eliminating misfires caused by an action that will not cycle properly.
It also works excellent as a penetrant and as a metal protector to prevent corrosion, I use it to prevent rust on occasional use tools that get put away and not thought about again until needed.
Another thing I use it for is key locks on vehicles and exterior doors, it displaces moisture and keeps them from freezing up when it gets cold.
Another product you mentioned is Heavy Duty Metal Protector ( MPHD)
MPHD is an awesome chain lube, I have many area farmers using this product on planter chains and corn and bean head chains.
MPHD comes in an aerosol can and sprays out as a liquid that penetrates into the pins and bushings of the chain, once applied the solvents evaporate and it leaves behind a dry waxy film that lubricates beautifully, but does not attract dust.
Most chain lubes stay wet after application, wet chains attract dust to them, the dust mixes with the chain lube and makes a gritty lapping compound that ends up increasing the wear and reducing the life of the pins and bushings in the chain.
The farmers I have using MPHD swear by it, most are reporting 2 to 3 times longer chain life on planter and cornhead chains versus the wet type chain lubes they were previously using.
Another place I use MPHD is on battery terminals, because the waxy residue it leaves seals out oxygen which eliminates corrosion.
Once I have cleaned the terminals I give them a coat and let it set until the solvents evaporate, I repeat this until I have 2 or 3 coats on the terminals.
Dont forget motorcycle and atv chains, it works super on them as well, and is compatible with o-ring type chains.

See AMSOIL Product Listings