SIM Sensitive

SIM Sensitive is a Finnish professional haircare manufacturer based in Tampere. It was founded in 1994 by Seppo Iso-Mustajärvi, an experienced hair-care manufacturer, with the aim of making professional salon products free of added fragrance [2][5]. The company builds its identity around what it calls Scandinavian heritage and sensitivity, describing its values as rooted in a Nordic lifestyle of purity, quality and design.

The brand remains active. It operates from a factory in Tampere, produces around four million bottles a year, and in 2025 was a featured brand at the Haircon trade event in Manchester as part of a launch into the UK market [5].

The company traces its origin to a practical problem inside the salon. According to the brand, the idea took shape in cooperation with hairdressers who faced occupational health problems or sensitivities and were looking for safer products to use in their day-to-day work. Combining what the company describes as functional, clean raw materials with these occupational-health concerns led to a line of products made without perfume [2].

Founder Seppo Iso-Mustajärvi is credited across several sources with establishing SIM Finland in 1994 on this premise [5]. The perfume-free approach became the through-line of the business: the company frames fragrance-free formulation not only as a benefit for sensitive consumers but as a way to protect the working environment of hairdressers over a long career.

SIM Sensitive positions itself as a manufacturer of professional hair and beauty products, with particular expertise in fragrance-free and low-fragrance formulations. On its Finnish brand page it describes itself as a hair and beauty care manufacturer ranked among the top performers in its field globally [3]. The company presents its products as a safer alternative for both consumers and salon professionals.

Its stated values center on purity, quality and design, which it links to a broader Nordic aesthetic and way of life. The brand also emphasizes transparency, saying it wants to build trust through open conversation about its products and their raw materials. Its tagline, used on the company's own site, is "Being REAL is what we know best."

The company's technical range is, by default, perfume-free. Its best-documented line is System 4, a therapeutic range aimed at scalp concerns such as dandruff, itchiness and irritation. The company describes the products as dermatologically tested and manufactured in Finland, and states that all System 4 products are cruelty-free and free of sodium lauryl sulfate [4]. Named active ingredients across the range include salicylic acid, climbazole, shale oil, menthol and chitosan [4].

Alongside System 4, the brand's catalogue includes color and technical products sold under the SensiDO name — among them cream color, bleaching product, developer and bonder — as well as additional lines such as DS and Simplex.

Manufacturing is concentrated at a single site in Tampere that the company describes as solar-powered. According to the brand, the factory carries 678 rooftop solar panels generating enough energy for production, and its energy-efficient technology saves more than four million liters of water each year [2]. The company also lists sustainable private-label manufacturing among its stated activities.

SIM Sensitive is an operating manufacturer. Independent business records list the company, Sim Finland Oy, at Hiitintie 4 in Tampere with a workforce of 51–200 employees [6]. Trade sources report annual production of roughly four million bottles and describe the brand as Scandinavia's largest hair-product manufacturer, though that last characterization is a marketing claim repeated in trade coverage rather than an independently verified figure [5].

Sources differ on how widely the brand exports. Trade and brand-site material consistently state distribution in more than 20 countries [5], while search-aggregated business data puts the figure at over 25 countries [6]. Its most recent documented activity is the 2025 UK launch marked at the Haircon event in Manchester [5].