Will bleach hurt Trex fencing?

Use of products containing bleach or oxalic/phosphoric acid will lighten the surface of Trex®. Use the product in an inconspicuous area to determine if the effect achieves the results you want. Neither product will affect the structural integrity of Trex Fencing. Keep in mind, though, that in many cases, using bleach to clean your Trex Fence is not necessary. Hot soapy water and a soft bristle brush can oftentimes do the trick just fine. Consult our Trex Fencing Care & Cleaning Guide for more information concerning different cleaning recommendations.