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Wood Finishes · 8 min read

Rubio Monocoat vs Osmo: Oil Plus 2C and Polyx-Oil Compared from the Data Sheets

What the manufacturers’ documents declare for Rubio Monocoat Oil Plus 2C and Osmo Polyx-Oil, and the criteria that matter when choosing between them for interior timber floors and furniture.

PF
Pilar Flores Materials Editor · March 28, 2026 · Updated 8 October 2026
Close-up of timber grain, illustrative photograph

In short

Rubio Monocoat Oil Plus 2C is a two-component hardwax oil that its maker says colours and protects wood in one layer; its 2021 data sheet declares 30–50 m²/L, a 5-day cure and 0 g/L VOC.[3] Osmo Polyx-Oil Original is a ready-to-use hardwax oil applied in two thin coats, with a declared 24 m²/L per coat and a VOC upper limit of 500 g/l.[2] These are manufacturer declarations. We found no independent test that compares the two, so this article sets out the declared data and the criteria that separate them. It does not rank them.

Both products are sold for interior timber floors and furniture, and both makers call them hardwax oils.[3][2] Their data sheets do not use the same terms, so comparison needs care. Here “Osmo” means Polyx-Oil Original unless a variant (Rapid, Tints or Raw) is named. Manufacturer statements are worded as claims.

Rubio Monocoat vs Osmo at a glance

Figures as declared in the manufacturers’ documents. Rubio figures are from its 2021 data sheet; the current sheet in Rubio’s asset library (pages 1 and 2) gives the same coverage, drying, cure, working-condition, VOC and colour figures, while the application and repair steps come from the 2021 sheet.[1][3] The Osmo column is Polyx-Oil Original unless a variant is named. None is an independent measurement.
ItemRubio Monocoat Oil Plus 2COsmo Polyx-Oil
BasisOil (A) plus accelerator (B), mixed about 3 : 1; the maker states no water or solvents.[3][4]Ready to use, not to be thinned; plant oils and waxes in dearomatized white spirit.[2]
Declared coverage30–50 m²/L, indicative.[3]24 m²/L per coat (Original, Rapid); 30 m²/L (Tints, Raw).[2][5][6][7] Osmo UK’s page lists 30 m²/L for the Original.[8]
CoatsOne layer; excess wiped off.[3]Two thin coats; one coat to renovate.[2]
Drying as stated12–24 h.[3]Original 8–10 h per coat at 23 °C / 50 % RH; Rapid 4–5 h; Tints and Raw about 24 h.[2][5][6][7]
Cure as stated5 days, 80 % in 2 days.[3]2–3 weeks to full cure, per Osmo UK’s page and the Tints and Raw sheets; the Original sheet gives no cure time.[8][6][7]
Application conditionsAir 8–30 °C, humidity 35–60 %, wood moisture 8–12 %. According to the current sheet, the mixed product may be used for a maximum of 4–6 hours after mixing A and B.[3][1]Wood clean, dry, frost-free, moisture up to 18 %; no air-temperature range given.[2]
VOC as stated0 g/L for each component.[3]Sheets state compliance with the EU category A/i (2010) limit, “max. 500 g/l”; no measured value is given.[2][9]
Hazard class (SDS)A not classified (2011); B classified H332, H317, H335 (2018).[10][11]Original not classified (2024); Rapid flammable liquid, H226 (2022).[9][5]
Colour system40 standard colours, blendable.[3]Original: four clear sheens; Tints: seven colours; Raw 3044; Osmo UK also lists 16 custom-mixed colours.[2][6][7][8]
RepairClean, re-apply in the original colour, wipe off excess.[3]Clean, dry surface, one coat.[2]
Test and certificate claimsMaker lists EN 71-3, food-contact compliance, GREENGUARD Gold, Indoor Air Comfort Gold, EMICODE EC1 PLUS, a B-EPD and others.[12]Sheets cite DIN 68861-1A, DIN 53160, EN 71.3 and class B2 under DIN 4102.[2]
Stated useInterior: furniture, countertops, tabletops, stairs, walls, floors.[3]Interior: floors and furniture; Osmo UK lists exterior products as a separate category.[2][8]

How does each system work?

Rubio Monocoat. Oil Plus 2C is an oil (component A) and an accelerator (component B), mixed at about three parts A to one part B and usable for 4–6 hours.[3] The maker describes “molecular bonding”: the oil adheres within minutes to the upper microns of the wood without forming a film, which it says is why one layer is enough.[4] Application is wipe-on, wipe-off: remove all excess within 30 minutes until the surface feels non-sticky.[3]

Osmo. Polyx-Oil Original is applied thinly along the grain, left to dry for about 8–10 hours and given a second thin coat, with no primer or sanding between coats.[2] Osmo says it is based on sunflower, soybean and thistle oil with waxes and paraffin, and describes the dry surface as microporous.[2]

Timber floor in an interior, illustrative photograph

Independent sources describe the category, not these products. The US Forest Products Laboratory’s Wood Handbook says flat oil finishes (commonly called Danish oils) that penetrate without forming a noticeable film are easily applied and maintained but more subject to soiling than film-forming finishes, and that re-waxing or resealing high-traffic areas of sealed-and-waxed floors is relatively simple.[13] The chapter is from the 1999 edition and does not mention hardwax oils; the quoted finishes are the “Danish oil” type, and the re-waxing point comes with the proviso that the stained surface of the wood has not worn through. A peer-reviewed 2021 study of linseed oil, hard wax oil and hard wax on thermally modified oak found that resistance to cold liquids depended mainly on the type of finish, and that results differed from native wood.[14] For that substrate see our profile of thermally modified wood.

What do the data sheets declare?

VOC. The two entries are different kinds of figure. Rubio states a content of 0 g/L for each component.[3] Osmo states that the product fulfils the EU category A/i limit of max. 500 g/l, a ceiling and not a measured content; its safety data sheet lists aliphatic hydrocarbons at 25–50 % and gives no VOC figure.[2][9] Annex I of Directive 2004/42/EC defines subcategory (i) as one-pack performance coatings, a group that includes floor coatings for wood and cement floors.[15]

Hazard data. Rubio’s component B is classified as harmful if inhaled (H332), a skin sensitiser (H317) and a respiratory irritant (H335); its hazardous ingredient is hexamethylene diisocyanate oligomers.[11] Component A was not classified in the 2011 sheet we found.[10] Osmo’s Original sheet (2024) says the product is not classified, and the 2022 Rapid sheet classifies it as a flammable liquid.[9][5] Both makers warn that oil-soaked cloths can ignite spontaneously: Rubio says to soak them in water, Osmo to wash them out or store them airtight.[3][9]

Certificates and tests. Rubio’s own overview names, for Oil Plus 2C, a B-EPD based on a VITO life cycle assessment, GREENGUARD Gold, Eurofins Indoor Air Comfort Gold, a DIBt emissions listing, EMICODE EC1 PLUS and the French A+ label, and lists EN 71-3 (toy safety) and Eurofins food-contact compliance, the latter described as in accordance with the underlying specification of Regulation (EC) 1935/2004.[12] This is the maker’s summary. According to UL Solutions certificate 188569-420 (issued 25 May 2021, expires 25 May 2027), Rubio Monocoat Oil Plus 2C meets GREENGUARD Gold under UL 2818 – 2022, with flooring compliance determined under California Department of Public Health Standard Method V1.2-2017 in an office and classroom environment; the criteria table on its second page lists maximum allowable predicted concentrations, for example TVOC 0.22 mg/m³ and formaldehyde 9 µg/m³, which are limits and not measured values for the product.[22] According to UL Solutions certificate 188569-410, with the same issue and expiry dates, the product meets GREENGUARD under UL 2818 – 2022, with flooring determined compliant in an office environment with an air change of 0.68 hr⁻¹ and a loading of 11.10 m².[23] The GEV EMICODE register has an entry for Rubio’s maker, Muylle Facon BV, which lists product categories (among them parquet oils and surface treatment of wooden floors, alongside adhesives and levelling compounds) but no named products and no emission class; a search there for “Osmo” returned no results.[16] Osmo’s sheets cite resistance to common liquids under DIN 68861-1A and suitability for toys under EN 71.3.[2] DIN 68861-1 describes how furniture surfaces behave under chemical stress,[17] and EN 71-3 sets migration requirements for certain elements from toy materials.[18] Neither catalogue scope mentions floor wear.

Which one suits which job?

The sheets do not support a ranking. They do show where a choice usually turns.

  • Site conditions. Rubio declares 8–30 °C, 35–60 % humidity and 8–12 % wood moisture.[3] Osmo declares wood moisture up to 18 %.[2]
  • Programme. Rubio is one layer with dry cleaning after 2 days at the earliest and water cleaning after 5.[3] Osmo is two coats with 8–10 hours between them (4–5 for Rapid).[2][5] Osmo UK states 2–3 weeks to full cure and says to let the finish cure fully before heavy use.[8]
  • Timber species. Osmo UK recommends the Original for oak, pine, spruce, beech, ash, alder, Douglas fir, birch and larch, and lists teak, iroko, wenge, merbau, ipe and bamboo among the species not recommended, pointing to Osmo Wood Wax Finish Extra Thin instead.[8] Rubio says Oil Plus 2C suits almost all wood types and advises its Deep Cleaner instead of its Cleaner on greasy woods such as teak.[3] See our bamboo profile. Osmo also lists cork floors, with thinner application and longer drying; see cork.[2]
  • Colour. Rubio offers 40 standard colours.[3][4] Osmo’s Original sheet lists four clear sheens, and Osmo UK also lists 16 custom-mixed transparent colours. To retain the light character of oak, Osmo UK points to Raw 3044, and the Raw sheet says it does not enhance the tone of the wood.[2][8][7]
  • Worktops and food contact. Rubio lists countertops and claims food-contact compliance.[3][12] The Polyx-Oil sheets make no such claim; Osmo UK lists a separate product, TopOil, as a food-safe worktop finish.[2][8]
  • Handling and upkeep. Rubio’s mixed product must be used within 4–6 hours, and its accelerator is a classified skin sensitiser.[3][11] Osmo’s Original is solvent-based and Rapid is classified flammable.[2][5]

What the sources do not tell us

  • We found no independent test comparing Oil Plus 2C and Polyx-Oil for wear, stain or water resistance, and no peer-reviewed paper naming either product in the searches we ran. Öko-Test’s 2019 test of 15 solvent-based hardwax oils names an Osmo High Solid product, not Polyx-Oil Original or Oil Plus 2C, and its full results are paywalled.[19]
  • Every coverage, time and VOC figure above is a manufacturer declaration. We read no test report behind them, and the standards only as catalogue pages.[17][18]
  • We read the two UL Solutions GREENGUARD certificates for Oil Plus 2C as copies in Rubio’s public asset library, but we did not open the UL SPOT registry, Rubio’s other certificates, or the Eurofins and DIBt registries. We could not locate Rubio’s B-EPD itself, so we do not state its validity period, and a web search found no EPD for Osmo Polyx-Oil.
  • We read the current Rubio sheet, “TDS Oil Plus 2C - EN”, in Rubio’s public asset library (pages 1 to 3 of 9; the asset page shows no date or version label). It gives the same coverage, drying, cure, working-condition, VOC and colour figures as the 2021 sheet; the application, repair and packaging details we use come from the 2021 sheet.[1][3] According to the current sheet, storage is up to 36 months in dry conditions in the original packaging, at +5 °C to +30 °C; a 2011 sheet gave 12 months.[1][20] The Rubio safety data sheets we found are older (2011, 2018), so check current versions.
  • Osmo’s Original sheet (12/20) gives 24 m²/L per coat while Osmo UK’s Original page lists 30 m²/L with one coat, and we could not tell why. The Original sheet gives no application temperature range and no cure time; the 2–3 weeks comes from Osmo UK’s page and the Tints and Raw sheets.[2][8]
  • A BRANZ appraisal (FH-6256-01-2) exists for Osmo Polyx-Oil on timber in New Zealand; the page offers no download, so we could not read its scope.[21] No source gives in-service durability or service life for either product.

Frequently asked questions about Rubio Monocoat and Osmo

Which is better, Rubio Monocoat or Osmo?

The sources do not support a ranking. We found no independent test comparing the two, and the manufacturers’ sheets use different terms. The table above shows where they differ.

How many coats do Rubio Monocoat and Osmo need?

Rubio’s 2021 sheet describes one layer of Oil Plus 2C with all excess wiped off. Osmo’s Polyx-Oil Original sheet describes two thin coats, the second after about 8 to 10 hours of drying, and one coat when renovating.

Is Rubio Monocoat VOC free and Osmo not?

Rubio’s 2021 sheet states 0 g/L VOC for both components. Osmo’s sheets state a maximum of 500 g/l, the EU limit for its category, and its safety data sheet lists hydrocarbon solvent at 25 to 50 percent. Rubio’s accelerator is classified as a skin sensitiser.

How long until a floor can be cleaned or used?

Rubio’s 2021 sheet states a 5-day cure, with dry cleaning after 2 days at the earliest and water cleaning after 5. Osmo’s sheets state 8 to 10 hours drying per coat for the Original and 4 to 5 for Rapid; Osmo UK’s page and the Tints and Raw sheets state 2 to 3 weeks to full cure.

Can either be used on worktops or outdoors?

Rubio’s 2021 sheet lists countertops, and the maker claims food-contact compliance, but the sheet is for interior use. Osmo’s Polyx-Oil sheets are interior documents with no food-contact claim; Osmo UK lists TopOil and exterior products separately.

How do you repair a worn area?

Rubio’s 2021 sheet says to clean the surface, re-apply Oil Plus 2C in the original colour and wipe off the excess. Osmo says to re-apply one coat to the cleaned, dry surface. We found no test of either method.

For another floor surface, see our article on Forbo Marmoleum and the linoleum profile.

Sources

  1. Rubio Monocoat, Technical Data Sheet Interior, "Oil Plus 2C" (file "TDS Oil Plus 2C - EN"), from the Rubio Monocoat public asset library. The content item was opened in a browser on 8 October 2026 and pages 1 to 3 of 9 were read: page 1 gives product information and technical characteristics, page 2 the application range, storage, cleaning and remarks, page 3 colour swatches. The asset page shows no date or version label. Manufacturer document. content item · asset library
  2. Osmo Holz und Color, Product Information | Interior, "Polyx-Oil Original" (3011, 3032, 3062, 3065), version 12/20, as published by Osmo UK. Manufacturer document. PDF
  3. Rubio Monocoat, Technical Data Sheet Interior, "Oil Plus 2C", dated 18/06/2021 (6 pp.), copy hosted on a retailer’s file server. Full text read: application steps, repair, tips, packaging, colours. Manufacturer document, older version than the 2026 sheet. PDF
  4. Rubio Monocoat, "Interior" products page (Oil Plus 2C), read 8 October 2026: the maker’s statements on molecular bonding, 0 % VOC, no water or solvents, 40 standard colours, the 3:1 mix and the accelerator. Marketing text, worded as claims. rubiomonocoat.com
  5. Osmo Holz und Color, "Polyx-Oil Rapid": product information, version 02/23, and safety data sheet, version 15.6, 11 February 2022, both as published by Osmo UK. Manufacturer documents. product information · SDS
  6. Osmo Holz und Color, Product Information | Interior, "Polyx-Oil Tints" (3040, 3067, 3071, 3072, 3073, 3074, 3075), version 02/17, as published by Osmo UK. Manufacturer document. PDF
  7. Osmo Holz und Color, Product Information | Interior, "Polyx-Oil Effect Raw" (3044), version 06/15, copy hosted by a UK retailer. Older version; the 2024 safety data sheet for the Original still lists 3044. PDF
  8. Osmo UK, "Polyx-Oil Original" product page, read 8 October 2026: application, curing, care, wood suitability, colour range and related products. Manufacturer’s UK importer; marketing text is worded as claims. osmouk.com
  9. Osmo Holz und Color, Safety Data Sheet "Polyx-Oil Original" (article numbers include 3011, 3032, 3062, 3065, 3040 and 3044), UK REACH format, version 20.2, printed 5 December 2024. Manufacturer document. PDF
  10. Muylle Facon (Rubio Monocoat), Safety Data Sheet "Rubio Monocoat Oil Plus 2C - comp. A", version 2.1, revision date 17/06/2011, old directive-based format; copy hosted by a US retailer. We did not find a newer version. PDF
  11. Muylle Facon (Rubio Monocoat), Safety Data Sheet "Rubio Monocoat Oil Plus 2C - comp. B", version 3.9, revision date 29/11/2018, format of Regulation (EU) 2015/830; copy hosted by a US retailer. Used for classification and ingredient. We did not find a newer version. PDF
  12. Rubio Monocoat, "Certificate overview" (PDF, "14 International product certificates"), linked from its Certificates page, read 8 October 2026. The maker’s own summary of certificates and labels and the products they cover; the GREENGUARD certificates were opened separately (see [22] and [23]); the others were not. PDF
  13. Williams, R. S., "Finishing of Wood," chapter 15 in Wood Handbook: Wood as an Engineering Material (1999 edition, FPL-GTR-113), USDA Forest Service, Forest Products Laboratory. Government research institute. Sections on interior finishes and floor finishes read; the text does not mention hardwax oils. Treesearch
  14. Vidholdová, Z., Slabejová, G. & Šmidriaková, M. (2021). "Quality of Oil- and Wax-Based Surface Finishes on Thermally Modified Oak Wood." Coatings 11(2):143. Peer-reviewed, open access. Abstract read via Crossref; the full text was not read. doi:10.3390/coatings11020143
  15. Directive 2004/42/EC of the European Parliament and of the Council of 21 April 2004 on the limitation of emissions of volatile organic compounds due to the use of organic solvents in certain paints and varnishes, EUR-Lex, read 8 October 2026. Used for the purpose (Article 1) and the Annex I subcategory definitions of one-pack and two-pack performance coatings. The Annex II limit tables did not display in the copy we read, so no limit value is quoted. eur-lex.europa.eu
  16. GEV EMICODE, manufacturers and brands register: entry "Muylle Facon BV" (Izegem), and a search of the register for "Osmo" that returned no results, both read 8 October 2026. Independent register; the entry lists product categories (including parquet oils and surface treatment of wooden floors) but no named products and no emission class. emicode.com
  17. DIN Media, "DIN 68861-1:2011-01, Furniture surfaces: Part 1: Behaviour at chemical influence," catalogue page, read 8 October 2026. Used for title, status and scope. The standard itself was not read. dinmedia.de
  18. EN 71-3:2019+A2:2024, "Safety of toys: Part 3: Migration of certain elements," catalogue page on Genorma, read 8 October 2026. Used for scope. The standard itself was not read. genorma.com
  19. Öko-Test, "Hartwachsöle im Test" (Ratgeber Bauen & Wohnen 5/2019, online 16–17 October 2019): 15 colourless solvent-based hardwax oils bought in January and February 2019. Public summary page read 8 October 2026; the full results are paywalled. Independent consumer-testing magazine. oekotest.de
  20. Rubio Monocoat, product sheet "Oil Plus 2C", dated 14/02/11; copy hosted by a UK retailer. Used only to show that older sheets differ (12 months’ storage). PDF
  21. BRANZ, appraisal FH-6256-01-2, "Osmo Polyx-Oil on timber substrate," report holder Osmo New Zealand Ltd, issued 25 August 2023, page updated 8 April 2026; read 8 October 2026. The page offers no download, so the scope was not read. Independent New Zealand building research body. branz.co.nz
  22. UL Solutions (UL Verification Services), Certificate of Compliance 188569-420, "GREENGUARD Gold", for Rubio Monocoat Oil Plus 2C; issued 25 May 2021, expires 25 May 2027; two pages read, including the criteria table. Independent certificate, read as a copy in Rubio Monocoat’s public asset library, 8 October 2026; the UL SPOT registry was not checked. asset library
  23. UL Solutions (UL Verification Services), Certificate of Compliance 188569-410, "GREENGUARD", for Rubio Monocoat Oil Plus 2C; issued 25 May 2021, expires 25 May 2027; first page read. Independent certificate, read as a copy in Rubio Monocoat’s public asset library, 8 October 2026; the UL SPOT registry was not checked. asset library

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