What Stikloporas does

Stikloporas (legal entity UAB "Stikloporas") is a Lithuanian industrial manufacturer founded in 2009 that produces expanded glass granules — a white, porous, inorganic thermal insulating material made from recycled glass waste. Recycled glass sourced from Lithuania and other Baltic countries is crushed, milled, mixed with blowing agents, and melt-processed at extremely high temperatures into granules ranging from 0.045 mm to over 16 mm, with bulk densities of 140–500+ kg/m³. The company operates a single production facility in Viečiūnai (Druskininkai municipality) on continuous 24/7 schedules, and a secondary product line, Metasil metakaolin, is manufactured using residual heat recovered from the expanded glass process.

The company's commercial model is B2B and heavily export-oriented: 98% of production is shipped to customers in more than 30 countries across nearly all continents, with the remaining output serving the Lithuanian domestic market. Primary customers are construction materials manufacturers that incorporate the granules into lightweight concrete, plasters and dry mixtures, lightweight and acoustic panels, thermal insulating aggregates, polymer concrete products, and 3D printing applications. Secondary use cases include oil extraction, chemical, food, energy, biofiltration, and agricultural applications requiring flammability, biological, or chemical resistance. Sales are executed through a direct sales team in Lithuania supplemented by distribution partners, with pricing handled on a quote basis rather than published.

Stikloporas holds Kiwa Inspecta certification under EN 13055-1:2002 for lightweight aggregate, and has secured three European Regional Development Fund grants — a 2019 eco-innovation award (720,670.50 EUR), a 2024 solar PV project (299,977 EUR EU share), and a 2025 energy-efficiency project (124,152 EUR EU share) — reflecting an active program to reduce the carbon intensity of its manufacturing. The company is privately held with no disclosed parent, investors, or external shareholders, and remains under founder/management control.

Name

Stikloporas

Legal name

UAB "Stikloporas"

Website

https://stikloporas.com

Company type

Private

Founded year

2009

Operating status

Operating

Headcount range

11–50 employees

Ownership category

akta.pro rank

Product category

Lightweight Construction Aggregates

NAICS

Glass and Glass Product Manufacturing (32721)

akta.pro primary industry

Glass Processing & Beneficiation (Cullet Production) (BPALADAG)

Keywords

• Expanded glass granules
• Lightweight aggregates
• Thermal insulation materials
• Metakaolin production
• Recycled glass manufacturing

Headquarters

HQ city

Druskininkai

HQ country

Lithuania

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Expanded Glass (Granulated Foam Glass) Sales: Stikloporas manufactures and sells expanded glass granules — a white inorganic thermal insulating material — in seven main grain size fractions. The product is sold to manufacturers of lightweight concrete, acoustic panels, thermal insulation fillers, dry mixes, plasters, polymer concrete, and 3D printing applications. 98% of production is exported to customers in over 30 countries.
2. Metasil Metakaolin Sales: Secondary product line — high-reactivity metakaolin powder produced as a pozzolanic additive for cement systems. Available in 20 kg paper bags, 1.5 m3 big bags, and bulk silo delivery. Used in high-performance concrete, dry mortars, self-levelling floors, protective coatings, and thermal insulation plasters.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels2 records

Core offering

Stikloporas manufactures expanded glass granules (granulated foam glass) from recycled glass waste, producing white porous granules in seven grain size fractions from 0.1 mm to 16 mm. The company also produces Metasil metakaolin powder using residual heat from the expanded glass manufacturing process. Products are sold to construction materials manufacturers, industrial applications, and green construction projects globally, with 98% of production exported to more than 30 countries.

Product overview

Stikloporas is a manufacturer of expanded glass products and metakaolin, operating as a B2B supplier to construction and industrial companies worldwide. The core product is Stikloporas Expanded Glass (Granuliuotas putstiklis), a white inorganic thermal insulating material made from recycled glass in various grain sizes. The second product line is Metasil Metakaolin, a high-performance supplementary cementitious material. Expanded glass is sold for multiple construction applications including plasters and dry mixtures, lightweight concrete, lightweight panels, thermal insulating aggregates, polymer concrete, and 3D printing. The company exports 98% of its production to over 30 countries globally.

Differentiator

Problem solved

Functional benefit

Brands

• Metasil: High-performance metakaolin product line produced by Stikloporas using residual heat from expanded glass manufacturing process. Used in high-strength cement systems, dry mortars, self-leveling floors, protective coatings, and thermal insulating plasters.

Products and services

• Stikloporas Expanded Glass (Granuliuotas putstiklis) White inorganic thermal insulating material made from recycled glass in the form of small porous granules. Produced in seven main grain size fractions from 0.1 mm to 16 mm with bulk density from 140 to 500+ kg/m3. Sold to construction materials manufacturers for lightweight concrete, plasters, panels, thermal insulation, polymer concrete, and 3D printing applications.
• Metasil Metakaolin High-reactivity metakaolin powder produced through controlled calcination of purified kaolin clay at approximately 750°C, using residual heat from expanded glass production. Available in 20 kg paper bags, 1.5 m³ big bags, and bulk silo delivery. Used as pozzolanic additive in high-performance concrete, dry mortars, self-levelling floors, protective coatings, and thermal insulation plasters.

Quantifiable outcome

• Up to 30% reduction in building heating costs when using expanded glass
• +7 more outcomes

Named customers1 record

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Two partnerships are on record, tiered core and minor.

• Lithuanian Universities (Research Partners)coreStrategic or Co-development Partner · 5 September 2019Stikloporas technologists cooperate with Lithuanian universities to develop efficient solutions in the fields of construction, building materials production, and industry. The accumulated experience allows the company to offer cost-effective, high-quality solutions and precise formulas to improve customers' products.
• Versli Lietuva / Lithuanian Confederation of Industrialists / Lithuanian Ministry of Foreign AffairsminorGTM or Marketing Partner · 19 August 2019Stikloporas participated in the Lithuanian-Indian Business Forum organized by Versli Lietuva together with the Lithuanian Ministry of Foreign Affairs and the Lithuanian Confederation of Industrialists during the official visit of India's Vice President on August 19, 2019. The forum aimed to promote cooperation between Lithuanian and Indian companies and establish new business contacts.

Scale indicators9 records

Recent moves10 records

Expansion highlights7 records

Direct peers

• Glapor: German manufacturer of cellular (foam) glass products including granular foam glass for lightweight concrete and insulation. Direct competitor in the European foam glass aggregate category.
• Misapor: Swiss producer of foam glass aggregate (Misapor) used as lightweight fill and insulation in construction. Competes directly with Stikloporas in the European expanded glass/foam glass aggregate market.
• Geocell Schaumglas: Austrian/German foam glass producer supplying cellular glass boards and granules for construction and industrial insulation. Overlaps with Stikloporas in foam glass insulation applications.
• Liaver: Manufacturer of expanded glass granules from recycled glass, serving construction and lightweight concrete applications. Direct competitor with comparable input (recycled glass) and product format (granular foam glass).
• Argex: Belgian/European producer of expanded clay aggregates (Argex) used for lightweight concrete and structural fills. A substitute-material competitor addressing the same lightweight-aggregate applications as Stikloporas.
• Hasopor: Swedish producer of expanded glass granules (Hasopor) for lightweight concrete, plasters, and insulation. Direct competitor with similar recycled-glass feedstock and B2B construction customer profile.
• Dennert Poraver: German manufacturer of expanded glass granules (Poraver) used as a lightweight aggregate in construction, plasters, and concrete. Directly competes with Stikloporas across the same B2B customer base and product applications.
• Laterlite: Italian manufacturer of expanded clay lightweight aggregates (Laterlite Plus, Lecacem) for construction screeds, lightweight concrete, and insulation. Competes in the same lightweight aggregate segment from a substitute-material angle.

Broad incumbents

• Rockwool: Global manufacturer of mineral wool insulation for buildings and industry. Competes against Stikloporas's expanded glass in the broader thermal/acoustic insulation specification space, though via a different material technology.
• Saint-Gobain: Global building materials and glass manufacturing group offering insulation, glass products, and construction solutions. Operates as a broad incumbent whose portfolio overlaps Stikloporas's end markets at significantly larger scale.

Market position

Strengths5 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

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 Stikloporas