10 Best Cleaner For Trex Deck 2026 in the United States

The 30 Seconds Outdoor Cleaner 5 Gallon Concentrate is a liquid cleaner designed to cover large outdoor areas, including Trex decks. It is an organic formula, which means it uses natural ingredients and is likely safer for the environment compared to harsh chemical cleaners. This makes it a good choice if you’re concerned about eco-friendliness.

The concentrate form means you need to mix it with water before applying, which helps you clean up to 1,000 square feet, making it cost-effective for bigger spaces. Being a concentrate requires some preparation and measuring, so it might not be as straightforward as ready-to-use sprays. Also, the large 5-gallon container is quite heavy (86 pounds), which might be inconvenient to handle or store.

If you want a strong, environmentally conscious cleaner for your Trex deck and don’t mind mixing the solution yourself, this product fits well. However, if you prefer something lighter or pre-mixed for quick use, you might find it less convenient.

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.

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.