Isolatek, the Stanhope, New Jersey maker of passive fire‑proofing systems, has been sold to private‑equity firm Catchment Capital. The buyer acquires a company founded in 1875 that supplies fire‑resistant solutions to commercial buildings, hospitals, data centers and advanced manufacturers. SK Capital Partners, which backed Isolatek for nearly three years, disclosed no price. The deal follows SK Capital’s strategy of exiting mature assets after value‑creation cycles.

Mike Harvey continues as CEO, steering the firm through a transformation that lifted revenue and broadened its market footprint. Jon Borell, managing director at SK Capital Partners, praised the partnership, noting the growth achieved during his tenure. Harvey also launched a silica‑based coating line, widening the portfolio. The sale hands control of a legacy business to a firm seeking to expand its infrastructure portfolio.

Investors will watch how Catchment leverages Isolatek’s niche expertise to cross‑sell within its existing construction‑materials holdings. The transaction underscores continued private‑equity interest in specialized industrial manufacturers despite a broader market slowdown. Analysts note stricter building codes could lift Isolatek’s earnings under new ownership. With no disclosed price, valuation will be inferred from comparable fire‑protection deals, setting a benchmark for future sector acquisitions.