It works great used it for some garage items and parts around the house.

It soaks into the metal fast and takes the rusty look away..

All amsoils products are great , unfortunately prices have doubled in the last two years!

Having been using the entire range of Amsoil products for my vehicles and motors for a very long time. Purchased a new 23 Toyota Tundra recently and wanted to help protect the frame/components from the Northeast winter salt. Applied MPHD to the entire underside of the vehicle, simple process overall and when dried it created a nice barrier from all contaminants. Truck has been driven in snow/salted roads and after being washed all exposed metal still looks brand new, highly recommend this product.

I would recommend to anyone who wants to DIY rustproof their car, truck or anything else that will rust. Plus it goes a long way. I did my Yukon XL with less than 2 cans.

I wish I could write a review, but I tried the product and then wanted to spray it again on a different area and nothing would come out. I followed directions on the can and now I get nothing out of the can. It might work, but I will never know. Disappointed that the can failed. Will not buy again

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

I’ve used this on my 2016 2020 Chevy duramax . With no rust! Spray entire under body no oxidization or rust. Putting on my 2022 I’m sold!! Also works great on bottom of mower deck!

Used this product to protect my equipment from harsh winter salt. The product holds up well from abuse of salt spray for the winter season.

Sprays easily and coats well. The straw is actually useable. I have used other brands while this one was unavailable and they suck. Can’t use the straws and more wax ends up on your finger tip then what you’re spraying. I use this product to coat the chassis and suspension on my trucks.

After debating whether to undercoat or use this product to protect frame rails and undercarriage, I am very happy that I listened to others reviews on this product. Turned out amazing, was easy to apply, and seems to be very long lasting after cured. Ordering more to have when needed.

damaged product container un-usable not first time won't purchase any more

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!

Works good

Didn’t use yet

Amsoil HD metal protector works great,( aka. cavity wax) I intentionally had to remove it because It does not wear off and this was my test, I put this on my lawn tractor appox. 10 yrs. ago. the part never rusted and did not come off. This product can be used inside car doors,quarter panels, trunk lids cab corners and so on. But the area should pretty clean first, I think so anyway. pretty tough stuff!!!

Great product, keeps your under carriage looking new. Note; make sure you follow the directions.

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.

One can came broken they sent a new one right away!

I decided to try this in a marine and off road applications and it has only been in use for about a month now. So far the results are looking good. Time will tell. I like the ability of 1 stop shopping with AMSOIL, so most likely this will be a standard shelf item... Looking forward to try more products from AMSIOL.