Question: How often do we need to apply release agent to plywood form panels?
Answer: Although forming panels are treated typically with form release agent at the mill, careful evaluation before use still is necessary. Unless the mill treatment is reasonably fresh when the panels are first used, they may require another treatment of release agent before the first use. Even medium density overlays should be treated with a chemical release agent prior to first use and between each pour. For reused panels or new panels not freshly mill-treated, application of a thin film of form release agent will prolong the life of the plywood forming panel, enhance its release characteristics, and minimize the potential for staining the concrete. For best results, apply the release agent a few days before using the forms. If edge sealer is not mill-applied, it is important to apply a top-quality edge sealer before the first pour. Forming panels start to swell at the edges due to absorption of moisture. Seal any cut edges with two coats of polyurethane paint or varnish.