Therm-O-Rock East

What Therm-O-Rock East does

Therm-O-Rock East, Inc. is a privately held, family-managed toll manufacturer and custom blender founded in 1960 and headquartered in Western Pennsylvania. The company's core business is processing raw perlite and vermiculite sourced from multiple worldwide origins, expanding these minerals at its facilities and custom-blending them into industrial and horticultural finished products on behalf of customers. The toll manufacturing model means Therm-O-Rock East processes materials owned by its clients, charging for the manufacturing service rather than selling product outright — though it also produces its own branded horticultural lines (Prime Gro and Peatwool) for the professional grower segment.

Operations run across two purpose-built facilities near Pittsburgh: a 90,000+ sq ft New Eagle site on nine acres with two railroad sidings, and a 50,000 sq ft Donora plant on eight acres with direct access to Interstates 70 and 79. Both sites are equipped with numerous silos for dry bulk material handling and use bulk and palletization methods for shipping and receiving. The company serves seven end-markets — steel, foundry, refractory, mining, construction, cement restoration, and horticulture — applying its mineral expansion and blending capability to each. Inbound raw materials and outbound finished products move globally via rail, road, water, air, and ocean freight (the latter through East Coast ports and the port of New Orleans).

Commercial activity is sales-led and relationship-driven: customers reach the company primarily through a toll-free number (800-967-6383) and the corporate website. Pricing is quote-based with no public disclosure, consistent with B2B industrial services. The company offers in-house quality assurance on all products and emphasizes continuity of family management and decades-long customer relationships as core commercial differentiators. No public revenue, headcount, ownership, or funding disclosures are available.

Name

Therm-O-Rock East

Legal name

Therm-O-Rock East, Inc.

Website

https://therm-o-rock.com

Company type

Private

Founded year

1960

Operating status

Operating

Headcount range

11–50 employees

Short description

Therm-O-Rock East is a family-owned toll manufacturer and custom blender founded in 1960, expanding perlite and vermiculite and producing horticultural mixes for industrial and professional grower customers across steel, foundry, refractory, mining, construction, and horticulture sectors from two Western Pennsylvania facilities.

Ownership category

akta.pro rank

Product category

Industrial Mineral Processing and Specialty Materials Manufacturing

NAICS

Ground or Treated Mineral and Earth Manufacturing (327992)

SIC

Abrasive, Asbestos & Misc Nonmetallic Mineral Prods (3290)

akta.pro primary industry

Perlite & Vermiculite (IMAEAFAJ)

akta.pro secondary industry

Formulation R&D, Scale-Up & Tech Transfer Services (AFABAIAJ)

Keywords

• Toll manufacturing services
• Perlite expansion processing
• Vermiculite expansion processing
• Custom blending packaging
• Horticultural growing media

Headquarters

HQ city

New Eagle

HQ country

United States

HQ region

North America

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. Toll Manufacturing Services: Processing and manufacturing services where Therm-O-Rock East processes raw materials owned by customers, charging for manufacturing and processing rather than selling products. This is the core business model for over 60 years.
2. Custom Blending and Packaging: Custom blending and packaging of horticultural mixes and industrial materials for customers, providing finished products under toll manufacturing arrangements.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels2 records

Core offering

Therm-O-Rock East provides toll manufacturing, custom blending, and packaging services for perlite, vermiculite, and horticultural mixes, serving industrial and commercial customers. The company expands multiple grades of perlite and vermiculite sourced from around the world at its two Western Pennsylvania facilities, and produces finished horticultural growing media products for professional growers. Its core business is contract processing (toll manufacturing) where it converts customer-owned raw materials into finished, quality-assured products distributed globally.

Product overview

Therm-O-Rock East is a toll manufacturing and custom blending company offering a portfolio of services and products centered on perlite, vermiculite, and horticultural mixes. The core offering is toll manufacturing and custom blending services, supported by the company's own expanding and processing of perlite and vermiculite raw materials. These are then either sold directly or used to produce finished horticultural mixes (including Prime Gro and Peatwool brands). All products are manufactured at the company's two Western Pennsylvania facilities and distributed globally.

Differentiator

Problem solved

Functional benefit

Products and services

• Toll Manufacturing, Custom Blending, and Packaging Services Contract processing service where Therm-O-Rock East processes customer-owned raw materials (perlite, vermiculite, and other minerals) into finished, quality-assured products, performing expansion, custom blending, and packaging at its two Western Pennsylvania facilities. The service serves industrial customers in steel, foundry, refractory, mining, construction, cement restoration, and horticulture, with global distribution via rail, road, water, air, and ocean freight.
• Expanded Perlite (All Grades) Thermally expanded perlite in multiple grades produced at the company's New Eagle and Donora facilities in Western Pennsylvania. Sold to industrial and commercial customers across steel, foundry, refractory, mining, construction, cement restoration, and horticulture applications.
• Expanded Vermiculite Thermally expanded vermiculite in multiple grades produced at the company's facilities from worldwide raw material sources. Sold to industrial and commercial customers across steel, foundry, refractory, mining, construction, cement restoration, and horticulture applications.
• Horticultural Mixes (Prime Gro and Peatwool) Blended and packaged horticultural growing mixes, including the branded Prime Gro and Peatwool product lines, used by professional growers. Manufactured using the company's expanded perlite, vermiculite, and other inputs at its Western Pennsylvania facilities.

Segments6 records

Ideal customer profiles6 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Scale indicators3 records

Recent moves3 records

Expansion highlights3 records

Direct peers

• Lambert Peat Moss: Major North American peat moss and custom-blended horticultural growing media supplier serving professional growers. Comparable as a competing producer of custom-blended growing mixes — the same product category Therm-O-Rock produces for horticulture customers.
• Cornerstone Industrial Minerals: Specialty processor of perlite and vermiculite serving industrial, horticultural, and construction customers. Directly comparable as a niche mineral processor with overlapping product portfolio and customer segments.
• EP Minerals: A leading producer of perlite, vermiculite, and diatomaceous earth serving filtration, industrial, and horticultural end markets. Directly comparable because EP Minerals performs the same mineral expansion and processing operations for overlapping industrial and horticultural customer segments.
• The Schundler Company: Long-established U.S. perlite and vermiculite processor and supplier serving construction, horticulture, filtration, and industrial applications. Directly comparable as a similarly-positioned mid-size mineral processor with comparable product mix and customer base overlap.
• Carolina Perlite Company: U.S. perlite producer and processor supplying expanded perlite for construction, filtration, and horticultural uses. Comparable as a similarly-sized perlite processor with overlapping end-market exposure and toll-style customer relationships.
• Dicalite / Dicaperl Minerals: Producer of processed perlite, vermiculite, and diatomaceous earth products for filtration, construction, and industrial uses. Directly comparable as a vertically integrated miner/processor offering the same expanded-mineral categories Therm-O-Rock toll-processes for its customers.

Broad incumbents

• Sun Gro Horticulture: Largest North American supplier of horticultural growing mixes and peat-based professional growing media. Comparable as a competing supplier into the same professional horticulture customer base that Therm-O-Rock serves with its Prime Gro and Peatwool branded mixes.
• Profile Products: Manufacturer of soil amendments, horticultural substrates, and erosion-control products. Comparable as a competing supplier into the professional grower and horticulture market with overlapping custom-blending capabilities.
• Imerys: Global leader in mineral-based specialty solutions with a substantial perlite and vermiculite product portfolio serving construction, horticulture, and industrial markets. Directly comparable because Imerys operates the upstream expansion/processing infrastructure for the same industrial minerals that form Therm-O-Rock's core offering, although at vastly larger scale and across many other mineral categories.
• Premier Tech: Diversified manufacturer of peat-based growing media, horticultural substrates, and industrial products. Comparable because Premier Tech directly competes in the professional horticulture and growing-media segment where Therm-O-Rock's branded horticultural mixes are sold.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

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 Therm-O-Rock East