How to Fix Yellowing on a Furniture Finish. Whether or not you apply more coats depends on how smooth and glassy you want the surface to look, but you should definitely apply another coat to the outside edges and the edges of the sink cutout for extra moisture protection. A DIYer by nature, Deziel regularly shares tips and tricks for a better home and garden at Hunker.com. To determine the size, measure the area of the top of the cabinet and allow for a minimum overhang of 1 inch on the front. Oil finishes tend to soak into the grain and yellow. During the first stage, the solvent evaporates, leaving a film coating on the wood, and during the second stage, the film cures -- usually by combining with moisture in the air -- to become hard. Polyurethane for butcher block countertops. If you want the smoothest finish, scuff the second coat with 400-grit wet/dry sandpaper before applying a third coat, and repeat if necessary. As a landscape builder, he helped establish two gardening companies. What Kind of Oil to Put on a Pine Tabletop? Start by scuff sanding the countertop with 220-grit sandpaper to knock down the seal coat that you applied previously, then lay on the polyurethane in long, even strokes. After the solvent has evaporated, the plastic coating left behind by both oil- and water-based polyurethane products is the same, so durability of the finish isn't an issue. Polyurethane is a good all-purpose coating for countertops because it's durable and waterproof. Sand the edges smooth, particularly if you're planning to install an undermount sink. The first is that it's virtually free of volatile organic compounds, although the isocyanates in most formulations can irritate sensitive individuals. You can apply it with a brush, but it isn't suitable for butcher-block cutting surfaces, for which you need a nontoxic oil. Varnishes all consist of resins, some of which have been modified with drying oils, dissolved in a solvent. Polyurethane is a synthetic plastic that replaces plant alkyds. The rim of a top-mount sink will hide the edges, but you should still sand them somewhat smooth so the finish provides maximum moisture protection. The film in traditional varnish is usually provided by plant-based alkyds combined with linseed or tung oil. If they harden, however, the only way to get rid of them is to sand them. © Copyright 2020 Hearst Communications, Inc. Organic solvents also cloud with age, so an oil-based finish tends to yellow, while a water-based one doesn't. He worked as an expert consultant with eHow Now and Pro Referral -- a Home Depot site. It readily dissolves in organic solvents and, when emulsified with other chemicals, in water. Polyurethane is suitable for food surfaces but not for cutting surfaces, for which a product like Rubio Monocoat 2C Oil is a better alternative. What is the best finish to use for butcher block countertops? Manufacturers produce countertop slabs by laminating strips of hardwoods like maple or oak, and they often precut the sink hole, but they don't finish the wood, so you have to do that yourself. Since you're applying an oil-based finish, you should use a … By creating an account you agree to the Hunker, Armani Fine Woodworking: Installation Guide, J. Aaron: Typical DIY Wood Countertop Mistakes to Avoid For The Weekend Warrior, Natural Handyman: Painting Laminate Countertops. An important prerequisite to wood countertop installation is a period of acclimation to allow the wood to come into equilibrium with the installation space. The second advantage is that water-based products dry quickly, allowing you to apply several coats in a single day. It dries more slowly than water-based poly, but it flows out more smoothly and lacks the plastic appearance. Besides having an abiding interest in popular science, Deziel has been active in the building and home design trades since 1975. Popular Woodworking: The 7 Myths of Polyurethane. Since you're applying an oil-based finish, you should use a natural-bristle brush, which will leave fewer stroke mars than synthetic bristles. Water-based polyurethane has two important advantages over the oil-based variety. He has degrees in science and humanities and years of teaching experience. The main difference between water- and oil-based products is the appearance of the finish. The best way to apply polyurethane varnish to a countertop is with a paintbrush, although the type of brush you need differs according to the solvent. We chose the fast-drying product, so shortly after the first coat was dry, we were able to apply the second coat as well.
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