Zünd Präzisionsoptik AG and Optivac AG in Diepoldsau combine plan optics, micro-optics and optical coating expertise under one roof. For over 50 years, we have manufactured high-precision compact and micro prisms, filters, mirrors and custom bonding systems for medical technology, industry, metrology, laser optics and telecommunications. Optivac provides 200+ coating processes, from anti-reflective layers to mirror and beamsplitter coatings. With cutting-edge technology and Swiss precision, we deliver prototypes and high-volume production.

Professional facade and insulation solutions improve energy efficiency, protect buildings and enhance visual appearance. From facade renovation to thermal insulation and energy-efficient upgrades, modern systems reduce energy costs and increase property value. Benefit from durable materials and expert craftsmanship for residential and commercial buildings.

Royal Leo Gips AG in Widnau is a reliable plastering and painting company serving the Rheintal region. The team provides interior plastering, painting, drywall construction, fire protection cladding, soundproofing, acoustic solutions, seamless flooring, creative plaster finishes, exterior insulation and ventilated façades. Professional advice, quality workmanship and punctual execution for new builds, conversions and renovations.