# MiroMet polish Buehler's cerium-oxide suspension for glass specimen polishing, with concentrate, method and safety-document limits. Reviewed: 2026-10-29 Tags: abrasives, specimen-preparation, glass ## Identity and formulation MiroMet Polish is Buehler’s **1 µm water-based cerium-oxide suspension**, part **40-6355-006**, supplied as **6 oz [180 mL]** of concentrate. Buehler calls for distilled water and gives no dilution ratio. It names glass and soft materials with very low melting points, without a numerical threshold or an exhaustive alloy list. [Buehler product page][product] In the first-edition glass methods, Buehler uses MiroMet on **TexMet P followed by MicroCloth** after silicon-carbide grinding (p. 30) and on **MasterTex** after diamond grinding and diamond-suspension polishing (p. 31). Only the p. 31 sequence lists MasterMet as an alternative for the final step. [SumMet methods, pp. 30–31][methods] MicroPolish is the separate alumina family. The matching MiroMet SDS codes and ingredient disclosure support its cerium-oxide identity. [Buehler product page][product] [US SDS, sections 1, 3][us] ## Documented glass preparation The MasterMet alternative applies to the p. 31 glass method and its final step. The 1 µm MiroMet label describes abrasive size. The source supplies no achieved roughness, scratch depth or maximum particle diameter. [SumMet methods, pp. 30–31][methods] [Buehler product page][product] The guide's stated development setup is an 8-inch [203 mm] platen with six 1.25-inch [32 mm] specimens in a 5-inch [127 mm] holder. Its loads are per specimen and depend on specimen area. Those conditions bound the published methods; they do not establish an arbitrary machine's settings. [SumMet methods, p. 2][methods] Buehler's 2018 SumMet guide also documents MiroMet in the traditional glass sequence. Its accompanying discussion identifies a risk of chipping at the leading edge of an unmounted specimen as abrasive rolls along it. It discusses diamond grinding discs as another approach when flat, scratch-free glass surfaces matter for optical analysis. This limitation concerns that preparation context, not a measured defect rate for every MiroMet application. [2018 SumMet, printed p. 60, table 15.4][summet2018] Explanatory synthesis. Glass composition, mounting, preceding abrasion, cloth and the intended measurement all affect whether a documented sequence is applicable. A bottle's identity alone does not establish optical quality, freedom from edge damage or dimensional acceptance. These sources concern specimen preparation and do not qualify a production [Finishing process references](../../processes/finishing/index.md). ## Dated product data The US SDS has reference **9104295**, version **1.0**, issued **1 October 2025**. It identifies both **40-6355-006** and **40-6355-128**. The second code is not a separate verified abrasive grade, and its inclusion in an SDS does not establish current package availability. The public ordering table reviewed here displays only 40-6355-006. [US SDS, section 1][us] [Buehler product page][product] The US document discloses cerium oxide, CAS **1306-38-3**, at **30–60%**. This disclosure range is not a working-mixture recipe. The SDS supplies no particle-characteristic data. [US SDS, sections 3, 9][us] The UK SDS is also version 1.0, dated 1 October 2025, and agrees on the codes and cerium-oxide range. Section 9 describes an off-white liquid slurry, **pH 7.5–8.5** and **relative density 1.4–1.6**. These are SDS descriptions, not lot-specific acceptance limits or values established for every dilution. Relative density is dimensionless; it is not a value in g/mL without a stated reference basis. [UK SDS, sections 1, 3, 9][uk] The US SDS gives no GHS hazard classification. It still specifies ventilation, protective gloves, safety glasses and suitable clothing, with respiratory equipment when ventilation is insufficient. Storage guidance calls for cool conditions away from heat and sunlight. These handling statements do not demonstrate polishing performance. [US SDS, sections 2, 7–8][us] ## Source coverage and limits Reviewed **29 October 2026 PDT**. The product page is an undated retrieval snapshot. Both eight-page SDS documents were read in full. The method guide identifies itself as first edition without a publication date; pages 2 and 30–31 supply the method evidence above. The historical SumMet guide identifies itself as fourth edition, fourth printing, January 2018; its relevant passage is on printed page 60. The reviewed evidence does not establish a complete formulation, working concentration, shelf life, removal rate, roughness guarantee or universal glass compatibility. It also does not establish a shop's installed equipment, approved method, consumable cost or production throughput. Safety-data ranges cannot resolve those process-specific unknowns. [product]: https://www.buehler.com/products/grinding-and-polishing/grinding-and-polishing-consumables/final-polishing-suspensions/ [methods]: https://www.buehler.com/assets/Brochures/English/SumMet/SumMet-Prep-Methods.pdf [summet2018]: https://www.buehler.com/assets/Catalogues/Downloads/2018_SumMet_Book_Web.pdf [us]: https://www.buehler.com/assets/SDS/US/MiroMet-US-English.pdf [uk]: https://www.buehler.com/assets/SDS/UK/MiroMet-UK-English.pdf