Zhongshan LianHeQiang-联和强 Rubber and Plastics Technology Co., Ltd.
Founded in 1990, Lianheqiang-联和强 has dedicated itself to the specialized R&D, intelligent manufacturing, and distribution of high-end sealing systems for doors, windows, and curtain walls. The company serves as a contributing drafter for national standards on sealing strips and a lead drafter for national standards on expansion joints. Its entire product portfolio has earned certifications from six major international and national standards bodies: China (GB), the United States (ASTM/ANSI), Europe (EN), the United Kingdom (BS), Germany (DIN), and Japan (JIS).
As a benchmark enterprise for sealing strips in China’s architectural curtain wall and fenestration industry, Lianheqiang is committed to driving high-quality sector development through deep specialization. Guided by core values of pragmatism, efficiency, professionalism, innovation, and mutual success, the company has established a comprehensive, closed-loop quality control system—spanning everything from raw materials and production processes to finished products. By upholding a strict standard of 100% product compliance, the company empowers the high-tech sealing industry through continuous technical innovation and superior quality.
Through "in-depth design" of its sealing system solutions, Lianheqiang-联和强 achieves the gold standard of "zero leakage." The company fortifies the "sealing safety" of doors, windows, and curtain walls, applying meticulous craftsmanship to protect major national-level projects—earning it the status of an "hidden champion" in the architectural sealing sector. To date, Lianheqiang has contributed to over 5,000 landmark projects worldwide, with overseas business accounting for 60% of its operations. From its base in the Greater Bay Area, the company serves the entire globe.
Corporate Culture
ENTERPRISE MISSION
Dedicated to the R&D and intelligent manufacturing of high-end sealing strips, we uphold rigorous quality control standards to build robust, long-lasting sealing barriers for doors, windows, and curtain walls.
CORPORATE VALUES
Integrity as foundation, innovation for progress, craftsmanship for quality, empowerment worldwide.
CORPORATE VISION
Meet customer needs and create value for society through superior technology and excellent quality.
TALENT VIEW
People-oriented, innovation-driven,
Talents grow and advance together with the enterprise.
Production equipment situation
The company has a total of 38 plastic extrusion production lines, vulcanized rubber strip production lines, vulcanized rubber rolling coil production lines, nylon insulation strip production lines, and composite sealing strip production lines. It also has various processing equipment such as rubber molding equipment, sealing strip corner machines, plastic injection molding machines, kneading machines, rubber mixing machines, and twin-screw extruders.
Testing equipment condition
After years of development, the company has a complete set of specialized testing instruments for curtain wall rubber strips, including computerized tensile testing machines, UV weather aging testing machines, sealing strip life test benches, sealing strip dedicated projectors, open flash point testers, hardness testers (including A degree, C degree, D degree), a full range of standard cutting tools, compression distortion testers, rotorless vulcanizers, aging boxes, high-precision density meters, expansion joint bench testing machines, rubber cutting machines, precision polishing machines, etc.
Aging detection equipment
Tensile testing equipment
Sulfurization testing equipment
UV weather resistance test
