Can I Use Wet and Forget on Composite Decking?

Composite decking, due to its makeup of both wood and plastic, generally requires less maintenance and has a longer life span than a traditional wood deck. But even composite decking can develop some unwanted growths.

We’ve received some inquiries about whether Wet & Forget is as effective on composite decking as it is on traditional. Below, you’ll find the answer.

Q: Can I use Wet & Forget on my composite decking?

A: Yes, Wet & Forget can be used on composite decking (for example Trex or any other brand of composite decking you might have). Wet & Forget has a pH of 8, making it gentle enough to use on decking without harming the surface.

Interested in learning if your decking material can be treated with Wet & Forget? Check out our deck cleaning tips & tricks. If you have any further questions or concerns, please let us know.


  1. Bill Russell

    We have problems with composite deck being under a large tree that allows birds to leave daily droppings and the each fall the leaves to drop and stain the deck. If I “read between the lines”, your product might make the surfaces easier to wash down.

    Is this correct?

    Finally, I assume that we will not be able to simply sweep our surfaces clean…only wash down?

    Please help if you can.

    Bill Russell
    Tulsa, OK

    1. Wet And Forget

      Hi Bill,
      Thanks for commenting. Our Wet & Forget Outdoor product is only going to target organic growth stains such as green algae, black mold, or mildew. Unfortunately you’re not going to have results using the product to clean or prevent bird droppings or tannin stains from leaves.

  2. Maryann

    Can I use Wet & Forget on shower doors?

    1. Wet and Forget

      Hi Maryann,
      We would recommend using Wet & Forget Shower on shower doors. Wet & Forget Shower will clean up any soap scum, shower grime, and body oils on your shower doors.

  3. Dee MazZei

    Can wet and forget be used on Azek decking? We we have black stains on our decking which we think is mold.

    1. Wet and Forget

      Hi Dee,
      Wet & Forget is safe to use on Azek decking. It will clean up moss, mold, mildew or algae growths and stains on your decking.

  4. Mike

    Can i use wet and forget On my powdered aluminum deck Railing?

    1. Wet and Forget

      Hi Mike,
      Wet & Forget is safe to use on a powdered aluminum deck railing. It will not damage or discolor the surface. Our product will remove moss, mold, mildew, or algae growths and stains from the surface.