{"product_id":"br54002200usbo-bona-r540-moisture-barrier-primer-1-32-galons-5-liters","title":"Bona R540 Moisture Barrier \u0026 Primer, 5 L \/ 1.32 Gal (BR54002200USBO)","description":"\u003cp\u003e\u003cstrong\u003eMOISTURE BARRIER \/ PRIMER\u003c\/strong\u003e · \u003cstrong\u003e5 L\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eBona R540 is a one-component, roll-on moisture membrane that works as a primer, vapor retarder or damp-proofer under wood flooring. It helps protect glue-down and nail-down installations from the subfloor moisture that causes cupping, and it contains zero VOC.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e One-component, roll-on polyisocyanate prepolymer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVOC:\u003c\/strong\u003e 0 g\/L\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoverage per coat:\u003c\/strong\u003e 400–600 sq ft as a primer; 300–400 sq ft as a vapor retarder on wood; about 400 sq ft as a moisture barrier on concrete\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoats on concrete:\u003c\/strong\u003e 2 coats for most installations (1 coat allowed only with a 1250G or 1500G trowel and a Bona Silane adhesive)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMoisture limits:\u003c\/strong\u003e Concrete up to 95% RH or 18 lbs\/1,000 sq ft\/24 h; wood subfloors up to 20% MC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDry \/ cure:\u003c\/strong\u003e Dry in 1–16 hours; cured in 24 hours\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible adhesives:\u003c\/strong\u003e Bona R851, R850T, R859 and Bona Silane adhesives\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eSpecifications from the \u003ca href=\"https:\/\/www.bona.com\/globalassets\/catalogassets\/9340---r540-sell-sheet---item-4647l_.pdf\" target=\"_blank\" rel=\"noopener\"\u003eBona R540 sell sheet\u003c\/a\u003e.\u003c\/p\u003e\u003ch2 style=\"font-size:18px;line-height:1.3;margin:28px 0 4px\"\u003eBona R540: common questions\u003c\/h2\u003e\u003ch3 style=\"font-size:15px;line-height:1.4;margin:16px 0 4px\"\u003eWhere can I buy Bona R540 near Atlanta or Nashville?\u003c\/h3\u003e\u003cp\u003eNDM Floors Distributor carries Bona R540 at our three stores: \u003ca href=\"\/pages\/stockbridge-ga\"\u003eStockbridge, GA\u003c\/a\u003e (south metro Atlanta, 470-507-0711), \u003ca href=\"\/pages\/marietta-ga\"\u003eMarietta, GA\u003c\/a\u003e (north metro Atlanta, 770-627-4313) and \u003ca href=\"\/pages\/brentwood-tn\"\u003eBrentwood, TN\u003c\/a\u003e (Nashville area, 629-216-1555). Stock varies by store, so call ahead to confirm availability and get a quote.\u003c\/p\u003e\u003ch3 style=\"font-size:15px;line-height:1.4;margin:16px 0 4px\"\u003eCan Bona R540 be used over concrete with high moisture?\u003c\/h3\u003e\u003cp\u003eYes. As a moisture barrier, Bona R540 is rated for concrete up to 95% RH or 18 lbs\/1,000 sq ft\/24 h. Most installations on concrete need 2 coats.\u003c\/p\u003e\u003ch3 style=\"font-size:15px;line-height:1.4;margin:16px 0 4px\"\u003eWhich adhesives work with Bona R540?\u003c\/h3\u003e\u003cp\u003eBona R540 is designed to work with Bona R851, R850T and R859 adhesives and with Bona Silane adhesives.\u003c\/p\u003e\u003ch3 style=\"font-size:15px;line-height:1.4;margin:16px 0 4px\"\u003eHow long does Bona R540 take to dry?\u003c\/h3\u003e\u003cp\u003eBona R540 dries in 1–16 hours depending on temperature and humidity, and it is cured in 24 hours.\u003c\/p\u003e\u003cp\u003eSee more \u003ca href=\"\/collections\/wood-flooring-adhesives\"\u003ewood flooring adhesives\u003c\/a\u003e at NDM Floors Distributor.\u003c\/p\u003e","brand":"Bona","offers":[{"title":"Default Title","offer_id":51915264688357,"sku":"GLUE:Bona:R540 Moisture Barrier\/Prim","price":149.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0835\/6901\/7061\/files\/1280_6sGuDDpcHkv3.png?v=1787409614","url":"https:\/\/ndmfloors.com\/products\/br54002200usbo-bona-r540-moisture-barrier-primer-1-32-galons-5-liters","provider":"NDM Floors Distributor","version":"1.0","type":"link"}