Poraver

What Poraver does

PORAVER GmbH is a German, family-owned manufacturer of expanded glass (Blähglas) lightweight aggregates produced from 100% recycled glass. Founded in 1983 and headquartered in Schlüsselfeld, Bavaria, the company operates three production facilities — Postbauer-Heng (Germany, since 1984), Innisfil, Ontario (Canada, since 2007), and Schlüsselfeld (Germany, since 2022) — with a combined annual capacity of approximately 400,000 m³ and stated plans to expand the Schlüsselfeld site to 150,000 m³ (three lines) by 2030.

The company's portfolio is built around four branded products: PORAVER, a pressure-resistant, thermally insulating lightweight aggregate for construction and industrial applications; PORASPHERES, described as the world's first hollow glass spheres made from recycled glass, offering lower water absorption and higher strength than PORAVER; METAPOR, an expanded-glass-containing metakaolin formulated as a lower-density, lower-water cement substitute for CO₂-reduced concrete; and EXTOVER, a fire-extinguishing granulate targeted at lithium-ion battery fires, metal fires, and preventive fire protection. Underlying technology involves thermal processing of recycled glass into spherical granules across six grain sizes (40 µm to 4 mm) with proprietary hollow-sphere and metakaolin variants.

PORAVER sells exclusively B2B through a direct sales force with regional coverage (including a Director of Sales for North America), supported by trade-show participation (INTERSCHUTZ, EUROCOAT, BRIGHT SOLUTIONS), an interactive website product finder, and R&D-led technical consultation. Customers span construction chemicals, dry mortar, lightweight concrete, plasters and screeds, automotive syntactic foams, defense and security applications, paints and coatings, composites, and 3D printing. Distribution is handled through PORAVER's own logistics network with multiple packaging formats (sample tubes, 55L bags, big bags, silo trucks) and multi-modal shipping. Long-term ownership control is anchored by founder Hans-Veit Dennert via the 2015-established Hans Veit and Johanna Dennert Foundation, intended to hold all company shares in perpetuity.

Name

Poraver

Legal name

PORAVER GmbH

Website

https://poraver.com

Company type

Private

Founded year

1984

Operating status

Operating

Headcount range

11–50 employees

Short description

PORAVER GmbH is a German family-owned manufacturer of expanded glass lightweight aggregates made from 100% recycled glass, serving B2B customers in construction, automotive, defense, paints, composites, and 3D printing across 400,000 m³ of annual production capacity.

Ownership category

akta.pro rank

Headquarters

HQ city

Schlüsselfeld

HQ country

Germany

HQ region

Europe

Offices4 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Lightweight Aggregate Sales: PORAVER generates revenue through the manufacture and global distribution of expanded glass products. The company sells various product formulations (PORAVER, PORASPHERES, METAPOR, EXTOVER) in different packaging formats (sample tubes, 55L bags, big bags, silo trucks) to industrial customers across construction, automotive, and other sectors. The revenue model is primarily B2B product sales with recurring orders from industrial customers.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels5 records

Core offering

PORAVER manufactures and globally sells expanded glass lightweight aggregates made from 100% recycled glass under four product brands — PORAVER® (lightweight granulate), PORASPHERES® (hollow glass spheres), METAPOR® (metakaolin cement substitute), and EXTOVER® (fire extinguishing granulate) — supplying industrial customers in construction, automotive, defense/security, marine, oil and gas, 3D printing, composites, and paints/coatings. Products are sold in sample tubes, 55L bags, big bags, and silo trucks via direct B2B sales and an international logistics network, backed by in-house R&D and application support.

Product overview

PORAVER is a portfolio of four distinct recycled glass-based products. The core offering is PORAVER® (expanded glass lightweight aggregate) for construction and industrial applications. This is complemented by PORASPHERES® (hollow glass spheres) as a next-generation variant with superior properties. METAPOR® provides metakaolin as a cement substitute for CO₂-reduced concrete, while EXTOVER® serves as a specialized fire extinguishing granulate for lithium-ion battery and metal fires. All products are made from 100% recycled glass and serve industrial sectors including construction, automotive, shipping, oil and gas, 3D printing, defense/security, and paints/coatings.

Differentiator

Problem solved

Functional benefit

Brands

• PORAVER®: Sustainable lightweight aggregate made from 100% recycled glass, purely mineral and particularly environmentally friendly. Combines low density with high pressure resistance, thermal insulation, sound absorption, dimensional stability, and resistance to heat, cold, moisture and chemicals.
• PORASPHERES®
• METAPOR®
• EXTOVER®

Products and services

• PORAVER® Expanded Glass Lightweight Aggregate Sustainable lightweight aggregate made from 100% recycled glass, purely mineral and environmentally friendly. Despite its low density, it is very pressure-resistant, thermally insulating, sound-absorbing, dimensionally stable, and resistant to heat, cold, moisture and chemicals. Available in six grain sizes from 40 µm to 4 mm and used for tile adhesive, plasters, floor structures/screeds, bituminous applications, construction chemicals, dry mortar, pasty building products, panels, lightweight concrete, syntactic foams, and fillings in construction, automotive, marine, oil and gas, 3D printing, composites, and paints/coatings applications.
• PORASPHERES® Hollow Glass Spheres The world's first hollow glass spheres made from recycled glass. Characterized by a closed surface and a single hollow space inside, PORASPHERES have lower water absorption, lower grain density, and higher strength compared to standard PORAVER. Used for lightweight components and syntactic foams, including demanding automotive and industrial lightweight applications.
• METAPOR® Metakaolin (Cement Substitute) Metakaolin containing expanded glass (Blähglashaltiger Metakaolin) used as a cement substitute in many applications. Thanks to its PORAVER expanded glass content, METAPOR has lower density and requires less water than other metakaolins, enabling CO2 reduction in concrete production.
• EXTOVER® Fire Extinguishing Granulate Special fire extinguishing granulate made from expanded glass (100% recycled glass) for lithium-ion battery fires and metal fires. Suitable for firefighting, preventive fire protection, and the safe transportation and storage of lithium-ion batteries (including military data center and hazardous goods transport use cases).

Quantifiable outcome

• Weight reduction of up to 60% possible in lightweight concrete applications
• +1 more outcomes

Segments5 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Scale indicators4 records

Recent moves7 records

Expansion highlights5 records

Regional players

• Stalite Lightweight Aggregate: US producer of expanded slate lightweight aggregate for structural concrete, geotechnical, and masonry applications. A regional competitor to PORAVER in North American construction, though using a different mineral feedstock (slate vs. recycled glass).

Direct peers

• Earthstone International: Manufacturer of lightweight expanded clay and shale aggregates for construction, horticulture, and industrial uses. A specialty lightweight aggregate peer competing against PORAVER in construction and infrastructure applications with an alternative mineral feedstock.
• Misapor AG: Swiss producer of expanded glass granulate made from recycled glass, supplying lightweight aggregate for screeds, insulating fills, and construction applications. Directly competes with PORAVER in the DACH region and broader European market.
• Liaver GmbH & Co. KG: German manufacturer of expanded glass granules from recycled glass for construction, industrial, and acoustic applications. The closest like-for-like competitor to PORAVER's core PORAVER product line in the European market.
• Glavel Inc. North American manufacturer of foamed glass aggregate from recycled glass for lightweight fill, insulation, and stormwater applications. A regional direct peer serving overlapping end-markets to PORAVER's North American operation.
• AeroAggregates: US producer of ultra-lightweight foamed glass aggregate made from 100% recycled glass, serving construction, geotechnical, and infrastructure applications. Comparable in raw material (recycled glass) and end-use to PORAVER's lightweight aggregate portfolio.

Broad incumbents

• Trelleborg AB: Diversified polymer engineering group with engineered lightweight fillers, syntactic foam components, and vibration-damping materials serving automotive, marine, and industrial customers — competing with PORAVER in syntactic foams and composites.
• 3M: Through its Glass Bubbles division, 3M is a globally dominant supplier of hollow glass microspheres for automotive syntactic foams, aerospace, and coatings. Overlaps directly with PORAVER's PORASPHERES technology at much larger scale and broader portfolio.
• Arcosa, Inc. US-listed infrastructure products company with a specialty materials/lightweight aggregate segment serving construction, infrastructure, and energy end-markets. A larger, diversified incumbent whose lightweight aggregate business overlaps with PORAVER's construction focus.

Emerging players

• Cospheric LLC: Specialty manufacturer of precision hollow glass microspheres and solid glass spheres for research, medical, cosmetics, and industrial applications. A niche emerging peer whose hollow glass sphere technology intersects with PORAVER's PORASPHERES portfolio.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/poraver
• Facebookfacebook.com/1891422771136657
• LinkedInlinkedin.com/company/poraver

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

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 Poraver