Composite Deck Cleaner

Corte*Clean® is how to clean stains caused by mold & mildew, black spots, green slime, sap, grease, oil, barbecue, tannin, leaf, pine needle, chalk, berries, blood, sunscreen, olive oil, citronella candle oil, peanut butter, red wine, pet food & waste, hard water, grass, ground in dirt, clay, brick, flower pot, rust, grime, & most other stains that are deep set or below the surface & can deeply root or saturate into the porous surfaces of most early generation non-capped composites generally manufactured till around 2015 +/- depending on the manufacturer.


Sodium Hypochlorite

causes the




Corte-Clean® has been the Care & Cleaning Guide and/or Mold Technical Bulletin recommended product for those that are educated, or would like to become educated as to why sodium hypochlorite and/or oxalic acid based products should never be used to clean early generation composite deck products made from exposed wood fibers & plastic. Examples of these products are Trex Accents®, Trex Origins®, Trex Contours®, Trex Profiles®, Trex Brasilia®, TimberTech ReliaBoard® & DockSider® Lowe’s® ChoiceDek®, Home Depot® Veranda®, Fiberon®, etc. Corte*Clean® is the original proven cost effective non-corrosive to structural metal decking hardware 100% biodegradable proprietary formula FOR CLEANING ALL COMMON STAINS, with an emphasis on those caused by fungi such as mold.

Before & After Customer Pictures. 



Failure to properly thoroughly clean composites made from exposed wood fibers of what is known as “tannin bleeding”, & especially those additionally made from dirty recycled plastic, of this & other dead organic dirty matter from which molds, mildews, lichens, mosses & algae can feed has resulted in them being infamously notorious for fungi growth & rapid re-growth; especially when scientifically unproven cleaning chemicals that contain sodium hypochlorite, such as chlorine bleach or common deck cleaners are recommended & used. Once composites are thoroughly Corte-Cleaned®, of this inherent flaw, proactively routinely using Corte-Clean®, at the reduced “routine cleaning” strength, to remove new stains & stain causing derbies, such as mold spores (seeds), that have landed since, especially if the composite manufacturer recommends semi-annual cleaning, at least twice yearly, spring & fall, or when stains appear, to keep composites clean; generally costs less time, labor & money. Generally, the more frequently Corte-Clean® is initially used, less & less is used, the more time, labor & money is generally ultimately saved. Those that procrastinate or have previously used products that exacerbate cleaning issues; generally spend more. Save yourself time, labor & money, choose & routinely use Corte-Clean® preferably before composites receive moisture, mold spores hatch & root into composites, or when stains are first noticed; before stains become deep set or below the surface in porous composites.

BEFORE – 18 Year Old Never Been Cleaned Wood & Plastic Composite Deck With Common Grease, Oil, Rust, Tannin, BBQ & Black Mold Stains.

AFTER – Same Composite Deck Cleaned Back to original Color from Customer Verified Testimonial on Reviews.IO



Corte-Clean® does not have all the additional costs, risks & time related to expensively purchasing & laboriously applying multiple other time consuming perceived in-expensive non-compatible cleaning chemical products; to clean specific stains.


You won’t need to purchase & use one or more products for only cleaning common black or green mold stains, especially those that contain corrosive sodium hypochlorite, the active biocide in chlorine bleach, which is scientifically unproven for molds (See Oregon State University Scientific Study), of which mildew is a subspecies, or products that claim to clean and/or prevent but generally take weeks or months to work; if at all.


A 2nd product to clean organic tannin stains, generally from the wood of which most composites are partially made, & leaves, pine needles, etc. left to rot on the composites, or rust, which corrosive to structural metal decking hardware products, specifically those that contain sodium hypochlorite or oxalic acid can unsafely cause to structural metal screws, nails & joist hangers requiring expensive early replacement.


A 3rd product for grease & oil, most commonly from the barbecue (BBQ).


You won’t need to purchase & apply a 4th expensive product to seal composites, which can exacerbate cleaning issues by sealing in fungi & stains, or 5th laborious product to remove the sealer when they begin to generally rapidly weather off/crack & look ugly, especially when fungi grows underneath!


Corte-Clean® has been proven to restore some of the original color of some composites previously chlorine bleached with sodium hypochlorite based products.


In addition to cleaning polyethelene (PE) based plastic  composites, Corte-Clean® has been successfully used since 2006 to routinely clean & keep composites clean made from polypropylene (PP), such as Correct Deck® & poly vinyl chloride (PVC) plastics such as; Certainteed® Boardwalk, Ameri-Deck®, Procell® (now AZEK®), Trex® & more.*

(See verified testimonials on!)


Above is a picture of the newer generation PVC “CAPPED& PE / WOOD core composite decking that appears to have grown black mold in-between. This is becoming an increasingly common problem in the composite decking industry. Corte*Clean® likely won’t clean this issue because it can’t penetrate the non-porous PVC outer layer shell, except on the end cuts & where the screw holes are located; as pictured. Unfortunately, this is likely where moisture is initially entering the core, allowing the mold to grow in the first place.


The information on this web site should be carefully considered. It will help guide you to why Corte-Clean® is the single cost-effective proven solution for cleaning & routinely keeping generally longer lasting expensive composite decks, docks, & fences clean of all common stains; not just those caused by molds.


Corte-Clean® customers can SAVE up to $2,000 +/- every 300 Sq. Ft.

over 30 years, the expected life-cycle of most composites, however most will last double that?!**

**See 2 of the largest composite manufacturer cleaning chemical recommendation price comparisons (CLICK HERE)!


Corte*Clean® Instructional Video

(Click Here)

Buy Corte-Clean Composite Deck Cleaner



*Note: Brand names are trademarks of their respected owners.


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