NEW YORK, August 19, 2026 – Sentinel Capital Partners, a private equity firm that invests in promising midmarket companies, today announced the sale of Marioff, a standalone unit of its Spectrum Safety Solutions platform, to Inflexion, a European private equity firm. Terms of the transaction were not disclosed.
Headquartered in Vantaa, Finland, Marioff is a leading global provider of high-pressure water mist fire suppression solutions. Its proprietary HI-FOG® technology protects life, property, and business continuity in applications where fire risk, uptime requirements, and asset protection are critical. Marioff serves customers in more than 70 countries across marine segments, such as cruise, navy, and commercial vessels, and land-based segments, including datacenters, energy and industrial facilities, and complex buildings.
Sentinel acquired Marioff in 2024 from Carrier Global Corporation (NYSE: CARR) as part of a complex carveout that created Spectrum Safety Solutions. In July 2026, Sentinel sold Spectrum’s Autronica unit to strategic buyer MSA Safety (NYSE: MSA). The two divestitures position Spectrum to narrow its focus to its U.S.-headquartered detection and monitoring businesses, Det-Tronics and Fireye.
“Our partnership with Sentinel has been instrumental in Marioff’s growth over the past two years,” said Juha Ilvonen, Marioff’s CEO. “Their strategic support and unwavering confidence in our team helped strengthen the business and position us for this exciting next chapter. We’re grateful for everything we accomplished together.”
“It’s been a pleasure partnering with Juha and the outstanding Marioff team,” said Eric Bommer, Sentinel’s Co-Managing Partner. “During our ownership, the team strengthened the business and reinforced its global leadership in water mist fire protection. We thank the entire organization for its dedication and wish Marioff every success as it embarks on its next phase of growth with Inflexion.”
Sentinel’s experience in industrials includes investments in Alemite (industrial lubrication equipment and components); Chromalox (commercial and industrial electric heating products and systems); ECM Industries, NSI Industries, and Power Products (electrical products); IEP Technologies (systems and services that suppress, isolate, and vent combustible dust or vapor explosions); and RotoMetrics (rotary tooling products).
J.P. Morgan and Citi served as exclusive financial advisors to Sentinel, and Kirkland & Ellis provided legal services.