Are you searching for the best deck cleaner for Trex? Cleaning a Trex deck may seem like a difficult task at first, given the relatively new nature of this care and maintenance routine.

Nevertheless, keeping your deck looking new is not a challenging endeavor if you are dealing with a deck cleaner for Trex. Our featured list will leave your surface looking like new – do know how to stain your deck?

Budget – This is one of the most important considerations if you are working with a restricted budget. You might want to go for a unit that offers multiple uses to get the best value for money.

Composite decks require you to obtain a cleaner with the capacity to perform below the surface by penetrating deep areas. See Also: Best Belt Sander for Deck.

7 Best Deck Cleaner for Trex in 2025

1. DEFY Composite Deck Cleaner (2.25 LB) Container for Trex – #1 Pick

This cleaner presents as a safe and highly effective solution for eliminating black stains caused by dirt, algae, and grime. The delicate nature of the Trex deck makes this DEFY product a safe option due to its non-biodegradable nature. Simply mix the powdered concentrate with water to clean and restore the beauty of exterior wood.

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The DEFY Composite Deck Cleaner works by foaming up and penetrating the wooden pores, which allow you to achieve a thorough finish.

A gallon of the solution will give you a coverage of 100-200 square feet. This product comes packaged in 2.25lb canisters with a carrying capacity of 5 gallons of cleaning solution.

Different application methods such as a mop, pump sprayer, or a soft, bristle brush may be used for this deck cleaner. If using a sprayer, you might want to utilize a mesh cheesecloth material to capture the larger granules to prevent it from clogging.

This product is more effective if mixed with lukewarm water. You only need a garden hose to rinse out after application. Only soap and water are needed for clean-up.

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2. Wet and Forget multi-surface outdoor cleaner – #2 Pick

This unit will allow you to eliminate green and black spots on trex decks. You only need to dilute it with water, sprayon the surface and forget. This concentrate leverages the rain and wind to gently eliminate mold (see mold rem,oval paints), mildew, moss and algae on outdoor surfaces. The gentleness provided by this cleaner makes it ideal for applying to trex decks.

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The Wet and Forget outdoor cleaner concentrate makes 6 gallons in total, offering you a coverage of 750-2250 square foot. With this unit, you get a clean surface for 1+ years in most cases.

The bleach-free, biodegradable, and phosphate-free nature of this unit makes it the ideal choice for all your Trex deck cleaning needs. This water-conserving application offers you unlimited shelf life. This allows you to safely store your pre-mixed cleaner until the next clean up exercise.

If you are tired of a never ending cycle of black and green stains on your outdoor surfaces, the Wet & Forget Outdoor cleaner is just what you need, thanks to its easy spray and leave application feature. What’s more? This cleaner is safe for nearly all outdoor surfaces.

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3. Pour-N-Restore Oil Stain Remover – #3 Pick

If you are dealing with oil, grease or food stains on your trex deck, this is just what you need. This cleaner uses proven technology to eliminate the toughest oil stains.

The eco-friendly ingredients utilized by this cleaner are both tough on stains and friendly on the environment. The micro-extraction technology utilized by this cleaner allows you to extract stains without scrubbing.

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This oil stain remover works on different grease and oil stains such as transmission fluids, cooking oil stains, food stains, and more. In addition to Trex decks, this unit is suitable for use on patios, driveways, concrete surfaces, and more. The Pour-N-Restore oil stain remover extracts and absorbs the stain and dries out from liquid to powder form. It works by combining a non-bleaching agent with a citrus degreaser. No scrubbing or rinsing is needed with this Pour-N-Restore degreaser.

This degreaser is made out of plant based solvents, making it a highly effective and environmental friendly option. Besides, it is phosphate free and biodegradable. Additionally, it captures all stains for more efficient disposal. For a clean application, this unit features a squeeze bottle and flip cap.

See Also: Best Deck Stain for Weathered Wood

4. Windex No-Scent Exterior Glass Trex cleaner 32 oz. liquid – #4 Pick

This product presents an easy way for cleaning and shining your trex deck and other outdoor surfaces. In addition to leaving no dull residue behind, this unit works by spraying, rinsing and leaving it to dry. For fast and convenient use outdoors, this unit attaches to a garden hose.

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The rinse and clean dial functions on the sprayer allow you to prepare and soak the surface for improved performance. The versatile formulation utilized in this cleaner is ideal for patio furniture, outdoor glass windows and trex deck surfaces because it leaves no residue behind.

This unit comes in a liquid formulation packaged in a 32oz. Bottle. The specially designed spray canister attaches directly to the water hose. With this unit, you can access all hard to reach surfaces while ensuring you are left with any dull residue behind. All you need to do is spray, rinse, and leave it to dry. No wiping is needed.

This cleaner is ideal for eliminating all the stubborn stains on your trex deck, leaving you with a streak-free shine. Its non-scented nature and the fact that it does not contain ammonia makes it ideal for repeated use among DIYers and professionals alike.

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5. Starbrite Sea Safe non-skid deck cleaner – #5

This Starbrite model is specially designed to provide quick and effective action with minimal effort. It utilizes special agents that eliminate dirt from the surface particularly in inaccessible areas.

This cleaner is both environmentally friendly because it does not contain phosphates or other harmful chemicals. Yet it is powerful enough to provide excellent results on decks, fiberglass, and painted surfaces.

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What’s more? The Star Brite Non-skid deck cleaner features a protective PTEF Polymer coating that helps to repel stains until the next cleaning exercise. This feature also offers protection to the surface from UV rays while protecting it from future stains.

This formulation contains special chelating agents capable of cleaning and absorbing dirt and spillages without heavy scrubbing. Unlike other cleaners in its class, this unit comes in different sizes, leaving you with enough solution to cover the whole Trex deck without hassles.

The Star Brite Non-skid deck cleaner features a biodegradable and environmental friendly formula. Nevertheless, it is effective in cleaning non-skid and textured surfaces and does not remove paint from the surface. A deck brush allows you to spread the solution evenly, leaving the cherating agents to work on the loose stains for approximately 3 minutes.

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6. Wash Safe Spray and Clean Composite Deck Cleaner

This deck cleaner effectively removes mold, mildew, grease and dirt from composite decks. This unit comes in an easy to use bottle with a hose end spray. No mixing is required with this unit, you only need to attach to the end of the water hose and saturate the Trex deck with the deck cleaner. The special formula of surfactant chemical removes stains from the deck pores without the need for scrubbing.

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This unit is both – safe and effective because it contains a very small concentrate of bleach. It does not cause harm to pets or landscaping. Hence, this cleaner is ideal for routine cleaning to keep your Trex deck looking new and immaculate.

What sets this cleaner apart from the others is its capacity perform below the surface cleaning by penetrating deep areas. Each gallon allows you to cover 250 square feet of decking surface. However, the cleaner can be mixed in different ratios depending on the age and condition of the Trex deck. Ideally, 1 gallon of the cleaner makes 5 gallons of the solution.

7. Mold Armor E-Z Deck & Fence Wash Gallon FG505

This unit cleans and restores the natural color and beauty of your Trex deck surface. The Mold Armor easily and quickly washes away exterior stains from mold and mildew. No mixing or scrubbing is needed with this model, you only need to spray and leave it to work for 5 to 10 minutes before rinsing it off.

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The mold armor utilizes a bleach based formula to remove types of stains on your surface. Packed in a one-gallon container, this unit gives you convenience of application with a sponge, a tank sprayer, a roller or a garden sprayer. In addition, the formula is ready to use and ready to connect to an W-Z deck and a hose end.

This Mold Armor solution is all you need to transform your weathered Trex deck back to its natural state. This formula’s reacting agent will brighten and restore your floor in under 10 minutes.

The biodegradable and environmental friendly nature of this cleaner makes it the go-to choice for all your outdoor deck washing services. A single application offers you a coverage of 250-300 square feet. Learn how to remove spray paint smell.

Considerations for Best Deck Cleaner for Trex

1. Eco-friendly and Multi-surface cleaning capability

The ideal pick should feature natural ingredients free from phosphate compounds, toxins and non-biodegradable substances. This is the key to ensuring that the solution is safe to use for both beginners and professionals.

To get the best value for money, the ideal pick should be capable of cleaning multiple surfaces such as ceramic, tiles, fences, and concrete in addition to Trex composite decks.

2. No scrubbing and Bleach free cleaning solution

The ideal pick should not require rubbing or scrubbing. For ease of application, the ultimate choice only needs to applied and wiped out to regain that natural look on your Trex deck surface.

Bleach cleaning solutions should be avoided at all costs due to their harmful effects on vegetation and the fact that it only kills mildew spores but falls short of eliminating them.

3. Type of deck cleaning solution and Application

The type of stain is a crucial determinant of whether to go for a water-based or solvent-based solution. Whereas water-based solutions tend to be colorless and are unlikely to alter the color of the deck, solvent-based cleaners tend to amber the color of the cleaning surface.

The ideal pick should give you the convenience of application with a sponge, a tank sprayer, a roller, or a garden sprayer. Also, the formula should be ready to use.

4. Speed of drying up and Scope of project

On application, the ideal washing solution should not take too long to dry out. This feature is particularly significant if you are dealing with outdoor deck surfaces.

If you are dealing with a large project, you might want to go for a cleaner with a larger capacity to avoid refilling the spray can every once in a while. With smaller projects, you only need a spray canister with a capacity of one gallon.

Conclusion

If you are looking to maintain the beauty of your Trex composite deck, cleaning, and other forms of care maintenance could go a long way. Semi-annual cleaning is recommended for the earlier versions of Trex products with a recommended composite deck cleaner.

Based on our featured list above, The DEFY Composite Deck Cleaner works by foaming up and penetrating the wooden pores, which allows you to achieve a thorough finish. Besides, it is non-toxic and offers you different application methods.