Answer
Mar 21, 2026 - 12:54 PM
Vermont Natural Coatings PolyWhey Exterior Penetrating Stain provides excellent protection and a beautiful finish for decks, fences and outdoor furniture. However, it is not recommended for direct contact with soil. You can use PolyWhey on the outside of a planter box, but AFM Safecoat DynoSeal is a perfect fit for safely sealing the insides of almost any type of raised garden bed or planter box. It will coat and protect just about any surface, old or new, including all soft and hardwoods and pressure-treated wood.
