10 Best Cleaner For Trex Deck 2025 in the United States

The Simple Green 13005CT is a concentrated industrial cleaner and degreaser that works well on various surfaces, including those similar to TREX deck material. Its strength lies in removing tough dirt, grease, and stains, which can be helpful if your deck has heavy grime or stubborn spots. Since it’s a concentrated liquid, you can dilute it to match the cleaning task, making it cost-effective and versatile. The application is flexible—you can use it by hand or with cleaning machines like pressure washers or scrubbers, which might be useful for larger decks.

The cleaner is biodegradable and recognized by the EPA's Safer Choice Program, indicating it’s safer for the environment compared to harsh chemical cleaners. It also has a mild sassafras scent, which some may find pleasant. However, as an industrial-strength degreaser, it might be stronger than needed for regular TREX deck maintenance, and overuse or improper dilution could affect the decking surface or nearby plants. The product is liquid, which makes it easy to apply but requires some care to measure and dilute properly.

If you prefer a ready-to-use cleaner or something specifically designed for composite decking, this might feel a bit more heavy-duty than necessary. Simple Green 13005CT serves as a powerful, eco-friendlier option for deep cleaning TREX decks, especially when dealing with tough grime, but casual or frequent cleaning might call for a gentler alternative.

The Oxy Solve House and Siding Pressure Washer Cleaner is a liquid concentrate designed to clean various types of outdoor siding, including vinyl, aluminum, wood, brick, and stucco. It effectively removes stains caused by mold, mildew, algae, and moss, making it suitable for keeping Trex decks and similar surfaces looking fresh. The main cleaning power comes from peroxide, which breaks down grime without using harsh chemicals, resulting in a safer and more environmentally friendly option.

This non-toxic and unscented formula reduces the risk of irritation and is preferable to traditional cleaners that contain strong chemicals. Being a concentrate, it can cover a large area—up to 6,400 square feet when used with a pressure washer—allowing for efficient cleaning. Application requires a pressure washer, so some familiarity or equipment is needed, but this method generally provides a quicker and more thorough cleaning compared to scrubbing by hand.

Users have rated the product positively for its effectiveness and ease of use. It is specifically designed for siding and deck materials and may not be suitable for delicate surfaces. This cleaner is well-suited for homeowners seeking an environmentally safer and powerful solution to remove mold and mildew stains on outdoor deck materials like Trex, provided they have access to a pressure washer for application.

Simple Green Pro HD Heavy Duty Cleaner Concentrate is a powerful, professional-grade cleaner designed for tough jobs, including grease, grime, and stains. It's a liquid concentrate that you dilute before use, making it versatile for many cleaning tasks beyond just decks—such as floors, industrial equipment, and vehicles. One of its strengths is that it’s biodegradable, which means it’s better for the environment compared to harsh chemical cleaners.

It’s also non-corrosive and safe on metal surfaces, reducing the risk of damage during cleaning. Being unscented is a plus for those who prefer no strong smells. Since it’s a heavy-duty product aimed at industrial use, it might be stronger than necessary for regular deck cleaning, so proper dilution is important to avoid any potential surface damage.

The application involves mixing with water and scrubbing or pressure washing, which may require some effort and equipment. While it’s effective at cutting through dirt and greasy buildup, it’s not specifically formulated just for TREX decks, so users should test a small area first. This cleaner is a solid choice for those seeking a versatile, environmentally friendlier product capable of handling a variety of tough cleaning tasks, though casual deck owners looking for a simple, ready-to-use deck cleaner might find it more involved.