Treat the knot areas with extra coats of the finishing material.

Jun 12, How do you remove sap from a composite deck? Step 1: Clean the surrounding area with a glass-cleaning agent and allow it to dry. Step 2: On the glass, you can use rubbing alcohol to wipe away the dried-on tree sap. Step 3: Using the moist cloth, gently rub away the tree sap in a.

Because tree sap is especially sticky, neither ordinary deck cleaners nor power washing will work.

In this regard, how do you remove tree sap?

We recommend using WD40 to remove the sap. Be sure to follow all manufacturer’s instructions carefully. Please note that WD40 also is effective in removing the labels that are found on the boards when they arrive at the job site. Feb 21, Mop undiluted oil soap, such as Murphy (view on Amazon), over the affected area of the deck.

Let the wood absorb the soap for 10 to 15 minutes, then scrub the sap with a stiff-bristle brush doused in water. Hose down the deck to send the sap out of sight and out of mind for good.