The term \u201cpenetrating finish\u201d is one of the most misleading in the vocabulary of finishing because all finishes penetrate. The term is generally used to describe just oil finishes, which dry slowly so they may penetrate a little deeper than faster-drying finishes. But depth of penetration doesn\u2019t have anything to do with protection for the wood, and it\u2019s here that the term becomes misleading because many people think it does, and some manufacturers claim it does. The common descriptive phrase is that the finish \u201cprotects the wood from the inside.\u201d<\/p>\n
But the quality of a finish that creates better protection for the wood\u2014that is, protection from moisture getting into the wood\u2014is that it dries hard so it can be built thicker on the wood. The thicker the finish, within limits, the better it resists moisture penetration, and oil finishes can\u2019t be built up because they don\u2019t dry hard.<\/p>\n
The better terms to use are \u201cfilm-building\u201d to refer to finishes that dry hard so they can be built up, and \u201cnon-film-building\u201d to refer to finishes that don\u2019t cure hard enough to be built up. Using these terms, oil finishes, and also wax finishes, are non-film-building finishes. Varnish, lacquer, shellac and water-based finishes are all film-building finishes.<\/p>\n<\/span>","protected":false},"excerpt":{"rendered":" The term \u201cpenetrating finish\u201d is one of the most misleading in the vocabulary of finishing because all finishes penetrate. The term is generally used to describe just oil finishes, which dry slowly so they may penetrate a little deeper than faster-drying finishes. But depth of penetration doesn\u2019t have anything to do with protection for the […]<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[1209],"tags":[1402,1213,1214,1767,1768,1442,1769,1291,1227,1387,1372,1228,1533,1297,1546],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/thefinishingstore.com\/wp-json\/wp\/v2\/posts\/231912"}],"collection":[{"href":"https:\/\/thefinishingstore.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/thefinishingstore.com\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/thefinishingstore.com\/wp-json\/wp\/v2\/comments?post=231912"}],"version-history":[{"count":0,"href":"https:\/\/thefinishingstore.com\/wp-json\/wp\/v2\/posts\/231912\/revisions"}],"wp:attachment":[{"href":"https:\/\/thefinishingstore.com\/wp-json\/wp\/v2\/media?parent=231912"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/thefinishingstore.com\/wp-json\/wp\/v2\/categories?post=231912"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/thefinishingstore.com\/wp-json\/wp\/v2\/tags?post=231912"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}