Byuksan

Byucksan is a building materials company operating multiple segments including construction materials, kitchen appliances and ventilation, paints, and fasteners.

Its core construction materials segment produces glass wool insulation, ceiling materials, interior and exterior finishing materials at domestic plants for distribution through nationwide channels.

Through subsidiary Hauzen, it handles built-in kitchen appliances such as range hoods and ventilation products, while Byucksan Paint outsources manufacturing and sale of paints for construction and industrial uses.

In 2025 the company acquired 100% of fastener and air-tacker maker Youngwoo Fastener for KRW 34 billion, adding it as a new business line. Youngwoo Fastener derives roughly half its sales from US exports, and the company has stated this acquisition is intended as a bridgehead into the US market.

Byucksan has also expanded its scope by newly establishing G-Plan and Byucksan Property.

In the inorganic insulation market, KCC and Byucksan form a domestic duopoly in glass wool production, while organic insulation materials such as styrofoam and urethane still hold a much larger share of the overall domestic insulation market.

2025 annual revenue came to KRW 610.7 billion, down from KRW 643.1 billion in 2024, while owner net income rose to KRW 22.8 billion from KRW 16.2 billion in 2024. The operating margin gradually declined from 7.2% in 2023 to 4.0% in 2024 and 3.8% in 2025.

On a quarterly basis, second-quarter 2025 operating profit was KRW 8.29 billion, but owner net income reached KRW 17.46 billion, well above operating profit, suggesting a sizable one-off non-operating gain was recorded.

Net income then declined sequentially to KRW 5.27 billion in the third quarter and KRW 1.93 billion in the fourth quarter of 2025 as that one-off factor faded.

In the first quarter of 2026, revenue fell to KRW 139.2 billion, the lowest among the recent five quarters, with operating profit of KRW 4.67 billion and net income of just KRW 1.11 billion.

However, second-quarter 2026 revenue rebounded to KRW 162.6 billion, operating profit reached KRW 9.83 billion, the highest of the recent five quarters, and net income improved to KRW 5.84 billion.

The trailing four-quarter (Q3 2025 through Q2 2026) sum of owner net income was approximately KRW 14.1 billion, lower than the full-year 2025 figure because it excludes the large one-off gain booked in the second quarter of 2025.

Following a trough in 2022 (3.6% operating margin, KRW 9.9 billion net income) and a peak in 2023, profitability softened before showing renewed signs of improvement from 2025 onward.

Domestic fire-safety standards for buildings have been tightened repeatedly following incidents such as logistics center fires, structurally boosting demand for inorganic insulation materials with non-combustible or quasi-non-combustible performance.

Glass wool, an inorganic insulation material made by fiberizing glass raw material at high temperature, is produced domestically by only two players, KCC and Byucksan, forming an oligopoly.

However, organic insulation materials such as styrofoam and urethane still account for over 80% of the overall domestic insulation market, suggesting there remains room for inorganic materials to penetrate further.

Media reports have noted that fire-safety standards for interior insulation installed between wall structures and finishing materials have not yet been established, leading to widespread use of cheaper combustible materials, with inorganic materials holding only about a 5% share of the interior insulation market.

Industry observers see potential for further expansion of the inorganic insulation market if related regulations are tightened.

Competitively, KCC benefits from a diversified conglomerate portfolio spanning paints and glass, while Byucksan has broadened its construction-materials-centered structure by adding Hauzen (kitchen appliances and ventilation) and Youngwoo Fastener (fasteners).

The domestic construction sector itself has passed through a weak phase amid high interest rates and subdued investment, though the structural demand driver from fire-safety regulation appears to partly offset this.

The company has stated plans to pursue fastener and air-tacker business opportunities in the US market through Youngwoo Fastener, which can be read as an attempt to diversify geographically and by product line beyond its traditional construction materials and kitchen appliance businesses.

In the construction materials segment, the company appears to be pursuing expansion into specialty insulation by launching a cryogenic-grade insulation product, the Glass Wool Resilient Blanket, used in LNG and cryogenic storage tanks.

The sequential improvement in operating and net profit seen in the first and second quarters of 2026 is interpreted as reflecting both fire-safety-driven demand in the construction materials segment and growing demand for higher value-added products in the kitchen appliance and ventilation segment.

That said, the pace of recovery in underlying construction demand and fluctuations in raw material and energy costs remain variables that could affect results going forward.

Given that roughly half of Youngwoo Fastener's revenue comes from the US, US construction and manufacturing conditions as well as the trade environment could also influence future results.

The company has stated it intends to continue research and development and capacity investment to defend its leading position in the inorganic insulation segment.