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POR-15 Metal Prep, Metal Etching Rust Neutralizer, Non-flammable and Water-based, 32 Fluid Ounces, 1-quart

4.6 4.6 out of 5 stars 3,498 ratings

$24.47
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Neutralizer
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Purchase options and add-ons

Brand POR-15
Color multi-color
Finish Type Metallic
Size 1 Count (Pack of 1)
Item Volume 1 Quarts
Special Feature Non Flammable
Unit Count 1.0 Count
Paint Type Oil, Spray, Watercolor
Specific Uses For Product Exterior
Surface Recommendation Metal

About this item

  • ✅ POR-15 METAL PREP - Is easy to use and effective. It's formulated to gently etch metal, to create an ideal anchor pattern for coatings, while simultaneously leaving a zinc phosphate coating to insure chemical bonding of paint and steel metal.
  • ✅ PREPARATION IS KEY - After thoroughly degreasing your work piece, apply POR-15 Metal Prep to both neutralize any rust and etch any clean bare metal. This will allow better adhesion of POR-15 Rust Preventive Coating or any other coating. Metal Prep is Essential to create superior edge corrosion, undercutting resistance & improves welding conductivity
  • ✅ APPLICATION - Remove loose or flaking rust, paint scale, etc. Surface to be treated should be free of grease, oil, and other foreign substances. Use of POR-15 Cleaner Degreaser is recommended. POR-15 Metal Prep works faster at temperatures above 70°F. Apply with brush, roller, spray, or dip rusted metal directly into solution.
  • ✅ SAFE & EFFECTIVE - Our water-based formula is non-toxic, non-corrosive is safe to use, and won’t leave behind harmful residues. Our Metal Prep is an inexpensive insurance policy that guarantees perfect adhesion of POR-15 Rust Preventive Coating to any metallic surface every time. Perfect to use on your car, fence, outdoor furniture, & more!
  • ✅ OUR SATISFACTION COMMITMENT – At POR-15 we strive to bring the ultimate in rust prevention. Known for the unbeatable 3-step stop rust system, POR-15 is trusted by DIY & Professionals. We are committed to innovation, quality control, and excellent customer service.
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POR-15 Metal Prep

POR-15 Metal Prep Metal Etching Rust Neutralizer

POR-15 Metal Prep provides the best adhesion for POR-15 Rust Preventive Coating or any other primer on any metal surface, including aluminum and shiny polished metal surfaces. Our simple process gently etches metal, creating an ideal anchor pattern for coatings such as POR-15 Rust Preventive Coating, while simultaneously leaving a zinc phosphate coating to insure chemical bonding of paint and steel. Avoid other preps that may leave harmful residues which prevent proper adhesion. After thoroughly degreasing your work piece, apply environmentally safe POR-15 Metal Prep to both neutralize any rust and etch any clean bare metal. This will allow better adhesion of POR-15 Rust Preventive Coating or any other coating. POR-15 Metal Prep is not caustic, corrosive, toxic or flammable.

* Formerly Prep & Ready

Metal Prep

Features:

  • Easy to use – one step process
  • Coats metal with zinc phosphate
  • No harmful residues
  • Insures perfect paint adhesion
  • Is reusable
  • Provides perfect base for all paints
  • Removes surface rust in minutes
  • Improves welding conductivity

Directions

Remove loose or flaking rust, paint scale, etc. Surface to be treated should be free of grease, oil, and other foreign substances. Use of POR-15 Cleaner Degreaser is highly recommended before application. POR-15 Metal Prep works faster at temperatures above 70°F. Apply with brush, roller, spray, or dip rusted metal directly into solution.

On Bare Or Rusted Metal Surfaces: Keep surface wet for 20 minutes, then rinse thoroughly with water. Remove excess from painted or chrome surfaces as quickly as possible to avoid discoloration. Surface must be bone dry prior to applying POR-15 Rust Preventive Coating. Do not store in metal containers.

* May stain Alloy surfaces. Use POR-15 Alloy Prep (formerly POR-15 AP-120 Metal Prep) for Alloys and soft metals like aluminum, and brass when coating with 2k Urethane Clear or Clear POR-15 Rust Preventive Coating.

Product Description

POR-15 40204 metal prep - 1 quart. Great for any metal surface. Prep leaves a zinc phosphate coating that will insure chemical bonding of paint.

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POR-15 Metal Prep, Metal Etching Rust Neutralizer, Non-flammable and Water-based, 32 Fluid Ounces, 1-quart

POR-15 Metal Prep, Metal Etching Rust Neutralizer, Non-flammable and Water-based, 32 Fluid Ounces, 1-quart


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    POR-15 Metal Prep, Metal Etching Rust Neutralizer, Non-flammable and Water-based, 32 Fluid Ounces, 1-quart
    POR-15 Metal Prep, Metal Etching Rust Neutralizer, Non-flammable and Water-based, 32 Fluid Ounces, 1-quart
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    Price$24.47$7.88$30.50-19% $64.99
    List:$79.99
    $9.98$38.24
    Delivery
    Get it as soon as Thursday, May 16
    Get it as soon as Thursday, May 16
    Get it as soon as Thursday, May 16
    Get it as soon as Thursday, May 16
    Get it as soon as Thursday, May 16
    Get it as soon as Friday, May 17
    Customer Ratings
    Easy to use
    4.4
    4.3
    4.7
    4.5
    4.8
    4.5
    Value for money
    4.2
    4.1
    4.5
    4.1
    4.5
    4.5
    Adhesion
    4.4
    4.3
    4.6
    4.7
    4.4
    Durability
    3.3
    4.4
    4.2
    4.6
    Longevity
    4.1
    3.5
    4.4
    Sold By
    POR-15
    Amazon.com
    Amazon.com
    EcoClean Solutions
    Amazon.com
    SportingDoc
    volume
    1 quarts
    340 milliliters
    1 quarts
    1 gallons
    12 fluid ounces
    1 gallons
    unit count
    1
    12
    32
    128
    12
    1
    paint type
    Watercolor, Spray, Oil
    Spray
    Watercolor, Spray
    Spray
    spary
    Watercolor
    surface suggestion
    Metal
    Fiberglass,Metal,Wood
    Metal
    Iron
    Metal
    Metal
    exterior finish
    Zinc
    Metal
    Aluminum
    specialty
    Non Toxic
    Long Lasting
    Odor Free
    Hypoallergenic
    Long Lasting
    Odor Free

    Looking for specific info?

    Customer reviews

    4.6 out of 5 stars
    4.6 out of 5
    3,498 global ratings

    Customers say

    Customers like the quality, ease of use, and rust of the paint. For example, they mention it's a great metal prep, works well, and is easy to apply. That said, some appreciate the performance, finish, and adhesion. Opinions are mixed on cleaning.

    AI-generated from the text of customer reviews

    173 customers mention158 positive15 negative

    Customers are satisfied with the performance of the auto accessory. They mention that it works well, is easy to apply, and gets results. Some say that it goes a long way and is worth the time.

    "Worked great for reconditioning a motorcycle fuel tank" Read more

    "...Follow the instructions and you’ll have the desired results. Effective and well worth the price." Read more

    "...Really good stuff." Read more

    "...my tank was jacked lol it ate through my tank... It works really well follow the directions!!" Read more

    58 customers mention43 positive15 negative

    Customers like the rust removal product. They say it cleans the metal of rust, seals it in, and looks great years down the road. Some customers also mention that it works okay on non-rusty parts.

    "...permanent, wear gloves cause it will stain your hands, BUT it seals the rust perfectly. It dries to a hardend surface, not rubbery...." Read more

    "...I tried twice, same results. I feel like it works okay on the non rusty parts. Guess I will be sandblasting." Read more

    "...They worked like a charm. This metal etching base completely removed all the rust in the tank and prepped the surface for the sealer...." Read more

    "...flaking surface rust but now just seven months later the whole front frame is rusting. most "rust converter" paints are frauds and do not work...." Read more

    32 customers mention30 positive2 negative

    Customers are satisfied with the quality of the paint. They mention that it has industrial strength, helps against rust, and is rock solid. They also say that it's a great prep product and makes a nice prep for welding.

    "...wheeling it and brushing this on the entire bed, it made it the perfect condition to take into the shop. I HIGHLY recommend!!" Read more

    "...It helps prep the rust and metal for a nice solid finish that is ready for lubricant...." Read more

    "...I've used it for that too. Makes a nice prep for welding too." Read more

    "...the rust, leaves a zinc coating, etches the metal, and I can paint directly on top of it!..." Read more

    29 customers mention25 positive4 negative

    Customers like how easy it is to use the auto accessory. They mention it's simple, easy to apply, and painless to prep. They say the results are amazing and it takes time but does what it promises.

    "Easy to apply and gets results!" Read more

    "easy to use work great clean great" Read more

    "Easy to apply, follow directions. When ready applied coating it laid very smooth with brush." Read more

    "Easy to use when following the directions. This was recommended by Caswell since my tank was not able to be filled with drywall screws and shook...." Read more

    21 customers mention16 positive5 negative

    Customers like the metal prep. They say it works as promised, binds rust, and is great for prepping metal for any paint job. They also say it etch the metal and leaves a zinc phosphate coating to further protect from rust.

    "...It etched the metal. No sanding or wire brush was required. I left it on 24 hours before painting with Oil based primer. Bonded great." Read more

    "Excellent metal prep for our 50 year old Honda CB350G fuel tank." Read more

    "...It is also great for prepping bare metal for POR-15 paint. I've used it for that too. Makes a nice prep for welding too." Read more

    "Does nothing for aluminum. Worse than no prep at all...." Read more

    13 customers mention13 positive0 negative

    Customers are satisfied with the finish of the auto accessory. They mention that it maintains a natural finish, has a nice etch, and leaves a great zinc phosphate finish. Some say that it changes the appearance of the metal.

    "...Not sure about that. But it definitely changed the appearance of the metal...." Read more

    "...left a great zinc finish, facilitated great weld beads, and i now have peace of mind knowing that my floors are fully protected with this product..." Read more

    "...to tell me that the inside of the tank is now as slick and shiny as a brand new car. I am ordering a 2nd set of 3 chemicals for him now." Read more

    "...can get all those hard to reach places way better and it has a nice black finish that will leave your truck looking gorgeous underneath." Read more

    10 customers mention7 positive3 negative

    Customers like the adhesion of the paint. They say it makes the paint stick very well, and that it goes on perfectly.

    "...spots where I had a good bit of rust (tongue and ramp) the paint stuck and cured great. Folllow the directions and you won't have any issues!" Read more

    "...POR-15 went on right behind this stuff and it made the paint stick very well." Read more

    "...Metal Prep leaves a sticky film that has to be washed off. It does not allow latex paint to adhere to metal and causes it to clump...." Read more

    "...it worked as advertised - can't say much more about it - the paint went on perfectly and the combination gave great result." Read more

    14 customers mention7 positive7 negative

    Customers are mixed about the cleaning. Some mention it cleans the metal well, while others say it leaves a white residue behind. Some say it works well to clean old gas tanks, while other say it's hard to clean.

    "I would recommend this product. Worked well to clean up old gas tank." Read more

    "...off the areas where I applied the etching product and white residue was left over...." Read more

    "...not only freed the insides of the blower fan, but cleaned the electrical contacts completely. The fan still works......" Read more

    "...even after rinsing it off, which is the final step, it left a white residue behind in spots which I was not sure about so I used a rag with some..." Read more

    Amazing product
    5 Stars
    Amazing product
    In the video I watched before buying this the guy said “most people had success with this product.” In this case I am one of those “most people.” I used this to get the rust out of the gas tank of my 1982 motorcycle. The first picture I have in this post was after I rinsed out the tank with hot water, the second was after I used the Metal Prep product. I also used the Cleaner Degreaser product they also sell. I fully recommend this to anyone using it for a gas tank if needed. Full 5 stars
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    Top reviews from the United States

    Reviewed in the United States on April 29, 2024
    Size: 1 Count (Pack of 1)Style: NeutralizerVerified Purchase
    Used this product in preparation for painting the underside of my mower deck which had suffered some rust after 7 years of service. It was used as directed on the bottle , etching the surface for 20 minutes. Then a clean water rinse and patiently waited two days for deck to dry. Then applied 2 coats of POR 15 paint. I am hoping for very positive results.
    Reviewed in the United States on April 23, 2024
    Size: 1 Count (Pack of 1)Style: NeutralizerVerified Purchase
    Does what it's intended to do
    Reviewed in the United States on October 24, 2021
    Size: 1 Count (Pack of 1)Style: NeutralizerVerified Purchase
    I bought this as recommended for use with the POR 15 sealant to prevent rust. I spent hours sanding and grinding the rust off the underside of a replacement truck bed I purchased for my Ford F5150 in preparation for the application of the POR 15 sealant and rust preventative which cost over $50 a quart. So when I watched some videos and all of them recommended the use of a metal etching solvent as the final pre-step, I felt it was in my best interest to make the purchase.

    Is this step required, heck I don't know but I was not about to cheap out after all that work. The process requires you to brush or spray this on and keep it wet for 20 minutes. Most video I saw people used a pump style sprayer for this but I choose to use a spray bottle to apply it since it was the quickest and easiest way for me to just purchase a good spray bottle. But it was just enough to cover the truck bed so keeping it wet for 20 minutes was a challenge with no extra spray after the initial application. So I covered it with plastic once it was sprayed to hopefully prevent it from evaporating too soon. It seemed to work, but 20 minutes? Not sure about that. But it definitely changed the appearance of the metal. However, even after rinsing it off, which is the final step, it left a white residue behind in spots which I was not sure about so I used a rag with some mineral spirits to wipe that away. It was not mentioned in the instructions on the bottle so I assume it was the thing to do and since mineral spirits contains no water I felt it would not hurt. I just did not make sense to me to paint over some powdery residue.

    In the end the project came out great and I am pretty confident in the work I did. Will the use of this product make a difference? It does make sense to remove as much loose rust as possible and creating a surface for a paint type product to adhere properly is something I have done many times so it makes sense. When I pull the old truck bed in the spring I plan to go through the same process on the truck frame below the bed. I will most likely try and find another cost effective etching solution so I can be sure to keep it wet as suggested.

    That would be my recommendation here - that is, get enough to keep it wet for the required 20 minutes. You can use the size of a 4 x 6.5 foot truck bed as an estimation measurement and decide to purchase this product or a more economical alternative - if there is one.

    Side Note: The process also calls for degreasing the surface before using the etching solvent. Again POR makes a product for this purpose, but in this case I just used some Purple Power degreaser which I have used for years when I needed a degreaser. I could not justify the purchase of the POR brand in this case. I did not see how it could be much different than any good degreaser that is applied and rinsed off in the same manner. Just something to consider.
    29 people found this helpful
    Report
    Reviewed in the United States on September 7, 2023
    Size: 1 Count (Pack of 1)Style: NeutralizerVerified Purchase
    Decided to work on the back half of my 1973 GMC C2500 pickup (long bed). I bought the POR15 Cleaner Degreaser and used that product first. Not sure what to think about it as it didn't appear to do anything that I hadn't already done with a wire brush set used in my drill. Then used the POR15 etching product. Instructions were very limited so I used the product full strength as I didn't see anywhere to dilute it. I used the 56oz hand pump (see picture) to apply the etching liquid to the frame. One container barely did 1/2 the rear frame section. If you're doing a full frame, diffs, etc, I'd buy 5-6 containers of the etching product, as you're supposed to keep it wet for 20 minutes. I rinsed off the areas where I applied the etching product and white residue was left over. Doubtful this will cause a problem when applying the POR15 rust coating product, but time will tell.
    Customer image
    4.0 out of 5 stars Buy way more than you think you'll need
    Reviewed in the United States on September 7, 2023
    Decided to work on the back half of my 1973 GMC C2500 pickup (long bed). I bought the POR15 Cleaner Degreaser and used that product first. Not sure what to think about it as it didn't appear to do anything that I hadn't already done with a wire brush set used in my drill. Then used the POR15 etching product. Instructions were very limited so I used the product full strength as I didn't see anywhere to dilute it. I used the 56oz hand pump (see picture) to apply the etching liquid to the frame. One container barely did 1/2 the rear frame section. If you're doing a full frame, diffs, etc, I'd buy 5-6 containers of the etching product, as you're supposed to keep it wet for 20 minutes. I rinsed off the areas where I applied the etching product and white residue was left over. Doubtful this will cause a problem when applying the POR15 rust coating product, but time will tell.
    Images in this review
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    Customer imageCustomer image
    6 people found this helpful
    Report
    Reviewed in the United States on February 18, 2024
    Size: 1 Count (Pack of 1)Style: NeutralizerVerified Purchase
    In the video I watched before buying this the guy said “most people had success with this product.” In this case I am one of those “most people.” I used this to get the rust out of the gas tank of my 1982 motorcycle. The first picture I have in this post was after I rinsed out the tank with hot water, the second was after I used the Metal Prep product. I also used the Cleaner Degreaser product they also sell. I fully recommend this to anyone using it for a gas tank if needed. Full 5 stars
    Customer image
    5.0 out of 5 stars Amazing product
    Reviewed in the United States on February 18, 2024
    In the video I watched before buying this the guy said “most people had success with this product.” In this case I am one of those “most people.” I used this to get the rust out of the gas tank of my 1982 motorcycle. The first picture I have in this post was after I rinsed out the tank with hot water, the second was after I used the Metal Prep product. I also used the Cleaner Degreaser product they also sell. I fully recommend this to anyone using it for a gas tank if needed. Full 5 stars
    Images in this review
    Customer image Customer image
    Customer imageCustomer image
    2 people found this helpful
    Report
    Reviewed in the United States on April 5, 2024
    Size: 1 Count (Pack of 1)Style: NeutralizerVerified Purchase
    Worked great for reconditioning a motorcycle fuel tank
    Reviewed in the United States on August 18, 2019
    Size: 1 Count (Pack of 1)Style: NeutralizerVerified Purchase
    Hey gearheads!!

    I am quick to complain about products that do not live up to claims, but in this case I used a product which exceeded my expectations by far: Por-15.

    Our Saab is mostly rust free except for the frame rails in the front clip, and the rear crossmember (the crossmember is replaceable... /if/ I want to do a full rear suspension rebuild). Last winter before I put the Saab back on the road (a part was on backorder) I found the torque box joints in the front had thick flaking surface rust but now just seven months later the whole front frame is rusting. most "rust converter" paints are frauds and do not work. Por-15 is a multi-step system where you clean the metal with degreaser (I skipped that step as the frame only had a couple of tiny greasy spots on it), scrape off any flaking paint and loose rust, then you apply a metal prep solution that both etches and thinly plates any bare metal and converts rust into a different iron oxide forming a patina, and then you apply the rust preventer to stop the rusting process.

    Well I did the etching step today, agitating it with a steel brush, washed it and blew off the excess water with a leaf blower, then just went out to check it after it had time to dry. I was amazed; everywhere I had agitated it with the steel brush, the rust had either been removed down to bare metal, and where the rust was slightly deeper it was converted to a black oxide (a patina), and the bare metal sections had a very thin but visible zinc coating. This stuff actually works. and once the rust was removed I found the frame is perfectly fine.

    Because it has spread though I am taking the front end off to treat the sections covered by the bumper and spoiler panels then I will get a paint sprayer and paint it.

    if you're restoring a bike or car where rust is in the early enough stages that the metal is still solid, try Por 15. if you follow the steps like I did that are provided in reviews by people who have had good luck with it, the results will blow you away. Not only will I be able to get another winter or two out of the Saab but it will probably last a long time for whomever I give it to. That is assuming of course the frame isn't also rusting from the inside out but I have an idea on how to address that with a pressure washer, Por 15, and fluid film.

    for the rust preventer I chose silver because it provides more pinhole hole filling capability but fortunately that was unnecessary because I caught the rust early enough.

    Follow directions and you will be pleased. Be sure to agitate it and reapply the metal prep many times, keeping the parts you are treating completely soaked.

    Attached photo is of the front subframe assembly/engine cradle with metal prep only, no Por15 preventer coating yet. The patina is black when dry, and brown with a slight reddish hue when wetted with water. I did not take before photos but if the rear crossmember is bad (I haven't checked yet) I will take before and after shots when I get to it. I will be applying silver POR-15 followed by black POR-15.
    Customer image
    5.0 out of 5 stars far exceeded expectations
    Reviewed in the United States on August 18, 2019
    Hey gearheads!!

    I am quick to complain about products that do not live up to claims, but in this case I used a product which exceeded my expectations by far: Por-15.

    Our Saab is mostly rust free except for the frame rails in the front clip, and the rear crossmember (the crossmember is replaceable... /if/ I want to do a full rear suspension rebuild). Last winter before I put the Saab back on the road (a part was on backorder) I found the torque box joints in the front had thick flaking surface rust but now just seven months later the whole front frame is rusting. most "rust converter" paints are frauds and do not work. Por-15 is a multi-step system where you clean the metal with degreaser (I skipped that step as the frame only had a couple of tiny greasy spots on it), scrape off any flaking paint and loose rust, then you apply a metal prep solution that both etches and thinly plates any bare metal and converts rust into a different iron oxide forming a patina, and then you apply the rust preventer to stop the rusting process.

    Well I did the etching step today, agitating it with a steel brush, washed it and blew off the excess water with a leaf blower, then just went out to check it after it had time to dry. I was amazed; everywhere I had agitated it with the steel brush, the rust had either been removed down to bare metal, and where the rust was slightly deeper it was converted to a black oxide (a patina), and the bare metal sections had a very thin but visible zinc coating. This stuff actually works. and once the rust was removed I found the frame is perfectly fine.

    Because it has spread though I am taking the front end off to treat the sections covered by the bumper and spoiler panels then I will get a paint sprayer and paint it.

    if you're restoring a bike or car where rust is in the early enough stages that the metal is still solid, try Por 15. if you follow the steps like I did that are provided in reviews by people who have had good luck with it, the results will blow you away. Not only will I be able to get another winter or two out of the Saab but it will probably last a long time for whomever I give it to. That is assuming of course the frame isn't also rusting from the inside out but I have an idea on how to address that with a pressure washer, Por 15, and fluid film.

    for the rust preventer I chose silver because it provides more pinhole hole filling capability but fortunately that was unnecessary because I caught the rust early enough.

    Follow directions and you will be pleased. Be sure to agitate it and reapply the metal prep many times, keeping the parts you are treating completely soaked.

    Attached photo is of the front subframe assembly/engine cradle with metal prep only, no Por15 preventer coating yet. The patina is black when dry, and brown with a slight reddish hue when wetted with water. I did not take before photos but if the rear crossmember is bad (I haven't checked yet) I will take before and after shots when I get to it. I will be applying silver POR-15 followed by black POR-15.
    Images in this review
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    32 people found this helpful
    Report

    Top reviews from other countries

    Translate all reviews to English
    brent lutz
    5.0 out of 5 stars Nothing
    Reviewed in Canada on February 27, 2024
    Size: 1 Count (Pack of 1)Style: NeutralizerVerified Purchase
    It’s a good product we used it on a 1959 ford Galaxie convertible
    martyzx11
    5.0 out of 5 stars Metal prep
    Reviewed in Canada on February 4, 2024
    Size: 1 Count (Pack of 1)Style: NeutralizerVerified Purchase
    This product prepares the inside of rusty fuel tanks for fuel tank paint
    Kevin mcwhirter
    5.0 out of 5 stars Wear rubber gloves.
    Reviewed in Canada on April 24, 2024
    Size: 1 Count (Pack of 1)Style: NeutralizerVerified Purchase
    Product is very good. Takes rust off.
    Denis Verrier
    4.0 out of 5 stars Bien
    Reviewed in Canada on January 12, 2024
    Size: 1 Count (Pack of 1)Style: NeutralizerVerified Purchase
    Automobile
    Client d'Amazon
    5.0 out of 5 stars bonne réception
    Reviewed in Canada on April 25, 2024
    Size: 1 Count (Pack of 1)Style: NeutralizerVerified Purchase
    un peu cher