Wood putty does not accept sanding and refinishing (See more on how to fill a drill hole in wood). However, it doesn’t provide adequate structural support due to its pliability. In contrast, wood putty is more suitable for filling smaller cracks and nail or brad holes. And, this paste doesn’t harden, unlike wood filler.īecause it dries hard, wood filler is ideal for large cracks in a wood project as it provides some structural support. The latter is generally a paste or plastic such as fiberglass, epoxy, or polyurethane. Wood filler usually contains sawdust or wood fibers suspended in a binder, missing in wood putty. Wood filler dries hard while wood putty never hardens This section explains the difference between the two products in detail. While the two products share some roles, putty and wood filler are far from identical. Many people use the terms wood putty and wood filler interchangeably, which is a mistake. Difference Between Wood Filler and Wood Putty In addition, the putty comes in a wide variety of wood stain colors and tones, so you can choose a color that perfectly matches the surrounding wood. Using wood putty after finishing the wood helps you avoid such outcomes. Sometimes the wood fillers contain resins and chemicals that get into the wood pores preventing the stain from getting in. This can lead to a big blotch on the wood. If you used a filler on unfinished wood then stained it afterward instead, you would likely end up with a blotchy spot. For example, a hard-drying wood filler that doesn’t change shape would likely cause the wood to crack as it contracts.Īdditionally, wood putty is used on finished wood. The flexibility of the best wood putty for nail holes also prevents wood putty from damaging the wood. If you fill a nail hole, a gouge, or a crack in a piece of outdoor wood with it, it will adjust to all the changes, making it durable and reliable. As you shop for the best wood filler to use on plywood edges, be mindful of the filler’s flexibility and suitability for outdoor applications to ensure your repair stands up to the rigors of the environment. If you used a hard wood filler on such an outdoor project, it would not adjust to the wood’s changing size and shape, potentially causing it to break away. Outdoor wood is exposed to extreme weather elements causing significant expansion and contraction. For starters, the flexibility prevents putty from breaking away from the wood during expansion and contraction. The non-hardening wood putty can be highly advantageous in many ways. Benefits of Wood Putty’s Non-hardening Behavior Additionally, they make the product dry into a more solid form than standard wood putty. These hardeners make wood putty dry faster. Still, you can induce wood putty hardening by adding a suitable hardener. The product doesn’t contain sawdust that would solidify into a compact material when dry. Wood putty doesn’t harden because it consists of pliable synthetic resins whose chemical structure doesn’t harden over time.
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