Cleaner Degreaser

Completely removes oil, grease, & dirt

item(s): 40104


POR-15 Cleaner Degreaser (formerly marine-clean) cleans and degreases in one application without leaving residues, noxious fumes, or flammable solvents. No other cleaner works as fast or as well. It makes petroleum-based cleaners almost obsolete because POR-15 Cleaner Degreaser can be diluted with water up to 4 to 10 times its volume while remaining more potent than other cleaners. This water-based and non-solvent cleaner removes grease, oil, mildew, algae, musty odors, soap films, wax. Use it to clean canvas, vinyl, nylon, holding tanks, grease traps, auto parts, and more.

Adhesion is important with most paints but has to be perfect for POR-15 Rust Preventive Coating to achieve its maximum effectiveness. A solvent wipe before painting didn't work with POR-15 Rust Preventive Coating; in the lab we found it did more harm than good by leaving a residue that didn't help with adhesion or appearance. We had to come up with a substance that would clean metal without leaving a residue. What we developed, POR-15 Cleaner Degreaser, contradicts all accepted theories about metal prep products: its water-based, not solvent-based and it cleans without leaving residues. In laboratory adhesion tests, our POR-15 Rust Preventive Coating using POR-15 Cleaner Degreaser first to clean the bare metal far exceeded every other prep product we found in the marketplace.

TIP: When applying to Aluminum or other alloys for clear coating, first test on an inconspicuous area for staining or discoloration. If staining or discoloration occurs, dilute Cleaner Degreaser 50% with water and retest.

POR-15 Cleaner Degreaser Technical Data Sheet


  • Engines
  • Transmissions
  • Grease traps
  • Frames
  • Removes rust stains from porcelain sinks, toilets, and tubs
  • Suspension components
  • Holding and water tanks
  • Galleys
  • Rubber, nylon, vinyl
  • Floor pans
  • Water line scum
  • Fuel tanks
  • Clothing
  • And more…

Step 1: Clean it with POR-15 Cleaner Degreaser

“We used the POR-15 Cleaner Degreaser to remove any surface oils or other contaminants on the metal. After primer, the correct semi-gloss black paint from POR-15 was applied with a spray gun and compressor on all parts of the frame.”
—Rod and Custom Magazine

Customer Reviews

Based on 54 reviews
Mike Markowicz
Great but for clean up.

Used twice. Once for corroded support post in middle of garage. Second was rusted over trailer hitch. Both cases seems to have done a great job, but will withhold judgement til full year has passed. Paint is impossible to clean from brushes which had to be discarded after use. Also extremely difficult to from skin and hair - a testament to it's durability once set.

Oscar Mendieta

Very good product

don anderson
quality product. a restoration product that works, amazing results.just follow the instructions a...

I had a small amount of water damage in the trunk of my 442, Por 15, 4 step rust inhibitor did a great job of fixing the problem. Rest assure this product really works. I was so confident with this brand, I just purchased a pint of their gold Oldsmobile engine paint, I recommend buying the full line of Por 15 products

Daniel Crookston
A must use for any coating!

This will completely change the shape of your metal to prepare it for a topcoat or several coats depending on your level of desired protection. I removed any loose rust with a wire wheel and light pressure in order to prep for the degreaser, and had a spray bottle mixed with the magic juice and one with hot water and applied liberally in sections as the project is a rather large trailer. It’s environmentally friendly (don’t drink it!) but it shouldn’t kill any grass at the right dilution for use. Used the etching afterwards with both the primer and the topcoat as needed!

Graham Moyse

Amazing results. My boat engine and transmission was rusted from salt water. Following the instructions proved to work well

POR-15 Cleaner Degreaser should be diluted with hot water. Four parts water to one part Cleaner Degreaser (4:1) works well for most jobs; but may be diluted up to ten parts water to one part Cleaner Degreaser (10:1). After using Cleaner Degreaser rinse job thoroughly with water. Metal Surfaces cleaned with Cleaner Degreaser should always then be treated with POR-15 Metal Prep before painting.

Caution Cleaner Degreaser may stain alloy surfaces.