How to remove pine sap from finished deck?
Use a dull saw — any size coarse-tooth saw will do — to either push or pull the crud out from between the boards. You’ll help your deck breathe better and last longer by getting rid of this rot-promoting gunk. You can remove any sap that has fallen onto the deck with a heavy-duty stain remover available at home centers and paint stores. Some stain/finish removers are formulated to remove oil-base clear and semi-transparent finishes, as well as buildup from repeated applications of deck sealer. Others are specially formulated to work on tough stains and dirt such as sap. You apply the stain remover with a mop or just pour it onto the surface. Wait 15 minutes, scrub it with brush, then rinse it off. Because sap is similar to oil-base finishes, it should come off easily.
