What Interfloat does

Interfloat Corporation is a Liechtenstein-domiciled (Ruggell) manufacturer of high-performance structured solar glass, founded in 1982 and positioned as Europe's largest producer in its category. The company sells a portfolio of branded products — GMB SINA, GMB CONE, and GMB DEFLECT for photovoltaic and solar thermal applications, and GMB VETRASOL for greenhouse applications — plus a smaller Spezialglas (specialty glass) line for non-solar use cases. Its core technology is a set of proprietary surface microstructures imprinted via shaped rollers onto low-iron glass, engineered to maximize solar transmittance while minimizing direct reflection and glare, with product variants tuned to deployment constraints (e.g., DEFLECT for airport-adjacent and dense residential sites, CONE for glare and interior visibility reduction, and VETRASOL HD/MD variants with calibrated haze values for plant-specific light diffusion).

All production is performed exclusively for Interfloat at the GMB Glasmanufaktur Brandenburg GmbH facility in Tschernitz, Germany — a reconverted former television glassworks that operates 365 days per year using modern manufacturing technology and electronic quality monitoring. The company is privately held by CEO Patrick Klammer, employs 251–500 people, and holds ISO 50001:2018, CE, and REACH certifications.

Interfloat operates a sales-led B2B model, selling direct to European photovoltaic module manufacturers, solar thermal system producers, and greenhouse construction companies at quote-based (undisclosed) prices. Distribution for greenhouse products is handled exclusively via the Dutch partner Glasimport Greenhouses B.V., and a strategic relationship with India's Borosil Renewables extends its international footprint. Marketing is conducted primarily through the corporate website and LinkedIn, with project references including aviation (Flughafen La Reunion), BIPV (MegaSlate residential chalet and façade projects), and utility-scale solar installations. Revenue model is hardware sales of B2B solar glass with no disclosed pricing or revenue figures.

Name

Interfloat

Legal name

Interfloat Corporation

Website

https://interfloat.com

Company type

Private

Founded year

1982

Operating status

Operating

Headcount range

251–500 employees

Short description

Interfloat Corporation is Europe's largest producer of structured solar glass, manufacturing high-performance GMB-branded glass products (SINA, CONE, DEFLECT, VETRASOL) through its German subsidiary GMB Glasmanufaktur Brandenburg and selling B2B to European PV, solar thermal, and greenhouse customers.

Ownership category

akta.pro rank

Product category

Solar Glass Manufacturing

NAICS

Flat Glass Manufacturing (327211), Glass and Glass Product Manufacturing (3272)

SIC

Flat Glass (3211)

akta.pro primary industry

Low‑E, Solar Control & Energy-Efficient Coated Glass (IMADAHAF)

akta.pro secondary industries

Decorative, Patterned & Privacy Glass (Frosted/Textured/Colored) (IMADAHAG), Solar Plant Components Supply & Manufacturing (Modules, Cells, Wafers, Mirrors, Heliostats) (EUACAGAK)

Keywords

• Solar glass manufacturing
• Photovoltaic cover glass
• Solar thermal glass
• Structured solar glass
• Greenhouse glass

Headquarters

HQ city

Ruggell

HQ country

Liechtenstein

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Solar Glass Sales: Revenue generated from the manufacture and sale of high-performance structured solar glass products for photovoltaic modules, solar thermal collectors, and greenhouse applications. The company produces glass through its German manufacturing partner GMB Glasmanufaktur Brandenburg and sells directly to European solar industry customers.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels3 records

Core offering

Interfloat manufactures and sells high-performance structured solar glass products for photovoltaic modules, solar thermal flat collectors, and greenhouse applications. The product portfolio centers on the GMB brand family — GMB SINA (micro-structured low-glare high-transmittance glass), GMB CONE (pyramid-embossed glare-reducing glass), GMB DEFLECT (anti-reflective glass for sensitive locations), and GMB VETRASOL (greenhouse glass with tunable light-scattering values). All glass is produced exclusively by its German subsidiary GMB Glasmanufaktur Brandenburg and sold B2B to European PV, solar thermal, and greenhouse industry customers.

Product overview

Interfloat is Europe's largest producer of structured solar glass, offering a unified product portfolio centered on three main GMB high-performance solar glass products (SINA, CONE, DEFLECT) for photovoltaic and solar thermal applications, complemented by the GMB VETRASOL product line for greenhouse glazing with various diffuse light specifications. The company also produces specialty glass for non-solar applications. Production is exclusively handled by partner GMB Glasmanufaktur Brandenburg GmbH in Germany using modern manufacturing technologies.

Differentiator

Problem solved

Functional benefit

Brands

• GMB SINA: High-performance solar glass for photovoltaic and solar thermal applications with micro-structure on both glass sides to reduce direct reflection and glare.
• GMB CONE
• GMB DEFLECT
• GMB VETRASOL
• GMB Glasmanufaktur Brandenburg

Products and services

• GMB SINA High-performance solar glass for photovoltaic and solar thermal applications. Features fine microstructures imprinted on both glass surfaces using specially formed shaping rollers, which keep direct reflection and glare at low levels while maintaining very high solar transmittance, making it one of the most powerful glasses for flat collectors and PV modules on the market.
• GMB CONE Solar glass with geometric, pyramid-shaped embossing for photovoltaic and solar thermal applications. While performance and annual yield are marginally lower compared to other GMB glasses, GMB CONE reliably reduces glare effects and diminishes visibility into the collector interior.
• GMB DEFLECT Special solar glass for locations where reflected light must be minimized, such as near airports or densely built residential areas. Features very high solar transmittance and ranks among absolute high-performance glasses for photovoltaic applications.
• GMB VETRASOL Glass (Greenhouse product line) Special greenhouse glass product line with different light scattering (Haze) values from 50-65% to optimize plant growth and yield depending on plant type. Offered in Zero, Low, MD 1, MD 2, MD 3, and HD variants through exclusive partner Glasimport Greenhouses B.V.
• Spezialglas (Special Glass) Custom specialty glass products for applications beyond the solar sector, including patterned and custom-thickness glass for special purposes.

Quantifiable outcome

• Very high solar transmittance for maximum energy yield in PV and solar thermal applications

Named customers5 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Three partnerships are on record, tiered core and strategic.

• Glasimport Greenhouses B.V.coreChannel Partner/ Reseller/ Distributor · 1 January 2013Partnership in the greenhouse business sector since 2013. As a traditional supplier, Glasimport Greenhouses B.V. is indispensable from the Dutch glass market. What began with the import of Eastern European horticultural glass developed in the 1990s into a local glass trade and supplier of replacement glass for various areas. Today, Glasimport Greenhouses B.V. is known for the supply of first-class greenhouse glass and exclusive distributor of GMB VETRASOL specialty glasses for greenhouses.
• GMB Glasmanufaktur BrandenburgcoreTechnology or IntegrationInvestment in the traditional television glassworks in Tschernitz (Niederlausitz) created a state-of-the-art solar glass production facility - GMB Glasmanufaktur Brandenburg GmbH. GMB produces exclusively for Interfloat 365 days a year, exclusively high-quality low-iron solar glass. This is guaranteed by the use of state-of-the-art manufacturing technology and electronic quality monitoring systems, as well as the abandonment of campaign-based production.
• Borosil Renewables Ltd.strategicTechnology or IntegrationBorosil Renewables Limited is the first and only solar glass manufacturer in India. The company recognized the opportunities in this segment early and began production at its solar glass plant in Bharuch in the Indian state of Gujarat in January 2010. The company has expanded its high-performance solar glass production capacity to 2.4 GW per year, more than doubling it. Known for innovations including developing the world's first fully tempered solar glass with a thickness of 2 mm, solar glass with the lowest iron content providing the highest glass efficiency, and being the first company worldwide to successfully remove the dangerous substance 'antimony' from its solar glass.

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Borosil Renewables: India's only dedicated solar glass manufacturer, currently operating ~2.4 GW of capacity. Directly comparable to Interfloat as a high-transmittance, low-iron solar glass specialist, and explicitly named as Interfloat's strategic international partner.
• Xinyi Solar: One of the world's largest solar glass producers, supplying anti-reflective coated and patterned cover glass for PV modules globally. Comparable product portfolio and end-customers (module integrators) though operating at significantly greater scale and lower cost base than Interfloat.
• Flat Glass Group: Major Chinese manufacturer of photovoltaic cover glass with substantial European and global module-maker customers. Directly competes with Interfloat in the cover-glass category for solar PV modules, particularly on commodity-tier volumes.

Broad incumbents

• AGC (Asahi Glass Company): Global glass manufacturer with solar-grade and architectural glass offerings through AGC Solar. Comparable in serving European module makers and architectural solar projects, though as part of a much broader portfolio including automotive, display, and chemicals glass.
• Saint-Gobain: Diversified European-headquartered glass and building materials group with solar glass products and BIPV solutions. Overlaps with Interfloat's photovoltaic cover glass and architectural solar applications, but operates at vastly greater scale and across multiple construction product categories.
• NSG Group (Pilkington): Global glass manufacturer with solar glass offerings integrated into its architectural and automotive glass portfolio. Comparable end-market overlap with European solar module integrators and greenhouse/architectural customers, though solar glass is a small fraction of overall revenue.
• Guardian Glass: Major international float and fabricated glass producer with solar-relevant coated glass products. Comparable in serving European architectural and solar glazing customers, but as part of a broader architectural glass portfolio rather than a solar specialist.
• Taiwan Glass Industry Corporation: Taiwan-headquartered glass manufacturer producing solar cover glass as part of its flat glass and fiber glass portfolio. Comparable in PV cover glass and float glass processes, though Asia-focused and offering broader downstream product lines than Interfloat.
• SCHOTT AG: German specialty glass manufacturer with solar and architectural glass offerings. Comparable as a Germany-based, high-quality specialty glass supplier to European solar and architectural customers, though solar glass is one of many specialty segments within a much larger technology glass portfolio.

Emerging players

• Onyx Solar: Spanish-based manufacturer of photovoltaic glass for BIPV facades, skylights, and architectural integration. Comparable to Interfloat in targeting premium architectural/BIPV use cases (e.g., DEFLECT and MegaSlate-style projects), though with crystalline-silicon-embedded glass technology rather than cover glass.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Interfloat