Will bleach hurt composite fencing?

Use of products containing bleach or oxalic/phosphoric acid will more than likely lighten the surface of composite fencing. Use the product in an inconspicuous area to determine if the effect achieves the results you want. Keep in mind, though, that in many cases, using bleach to clean your composite fence is not necessary. Hot soapy water and a soft bristle brush can oftentimes do the trick just fine. Since bleach is corrosive, it's best to use alternative cleaners per the composite fence's recommendations typically found on their web site. In regard to Trex Fencing, consult our Trex Fencing Care & Cleaning Guide for more information concerning different cleaning recommendations.