Sealing Devices
Sealing Devices is a third-generation, family-owned industrial manufacturer, fabricator, and distributor of sealing solutions — including O-rings, gaskets, EMI shielding, thermal management, and exclusive Gore protective vents — serving aerospace, defense, industrial, electronics, battery, telecom, and transportation customers across North America.
- Company typePrivate
- Founded1963
- HeadquartersLancaster, United States
- Headcount251–500
- GTM typeB2B
- OfferingHardware or Manufacturing
What Sealing Devices does
Sealing Devices is a privately held, third-generation family-owned industrial manufacturer, fabricator, and distributor headquartered in Lancaster, New York, founded in 1963. The company produces and distributes a broad portfolio of sealing solutions, including O-rings, gaskets, molded rubber parts, EMI shielding, thermal management materials, sponge and foam gasketing, hydraulic and radial shaft seals, and adhesives and sealants, using elastomer, PTFE, graphite, metal, and foam/sponge materials. A defining commercial asset is its status as the only North American distributor of W.L. Gore & Associates protective vents, supplemented by authorized distributor relationships with Parker Hannifin, 3M, Saint-Gobain, Freudenberg, Rogers, Garlock, CoorsTek, Flexitallic, Interface Solutions, JM Clipper, Minnesota Rubber, Loctite/Henkel, Warco, and Klinger Thermoseal. The company also offers custom fabrication capabilities including precision lathe-cut seals, custom extrusions, die-cutting, kiss-cutting, laminating, and automated adhesive application.
Sealing Devices holds ISO 9001:2015 and AS9100D certifications, is ITAR compliant and NSF certified, enabling it to serve specification-critical applications in aerospace, defense, industrial/fluid power, electronics and semiconductors, battery and energy storage, telecom and IT, and rail/marine/bus transportation. Its go-to-market is sales-led, anchored by an in-house applications engineering team that provides consultative technical guidance to enterprise and mid-market buyers via direct sales, its website (Request a Quote), phone, and in-person consultations; pricing is quote-based with 30-day validity, F.O.B. plant, and net-30 payment terms. Satellite offices in Erie, Rochester, and Melbourne extend U.S. coverage, with operations currently concentrated in North America.
Revenue is not publicly disclosed and no funding rounds have been raised. The company is led by Terry Galanis, Jr. (President & CEO) and Elizabeth Galanis-Miller (President & COO), the latter identified as a third-generation leader and recognized on Buffalo Business First's 2025 Power 200 Women list. Recent strategic emphasis has been on EV/battery applications, new high-airflow and gearbox protective vents, and fabric-reinforced diaphragms for fire-resistant military, aerospace, and industrial use.
Sealing Devices firmographics
Firmographics- Name
- Sealing Devices
- Legal name
- Sealing Devices Inc.
- Website
- https://sealingdevices.com
- Company type
- Private
- Founded year
- 1963
- Operating status
- Operating
- Headcount range
- 251–500 employees
- Short description
- Sealing Devices is a third-generation, family-owned industrial manufacturer, fabricator, and distributor of sealing solutions — including O-rings, gaskets, EMI shielding, thermal management, and exclusive Gore protective vents — serving aerospace, defense, industrial, electronics, battery, telecom, and transportation customers across North America.
- Ownership category
- akta.pro rank
Sealing Devices industry classification
Industry- Product category
- Industrial Sealing Products & Gasket Manufacturing
- NAICS
- Gasket, Packing, and Sealing Device Manufacturing (339991), Adhesive Manufacturing (32552)
- SIC
- Gaskets, Packg & Sealg Devices & Rubber & Plastics Hose (3050), Fabricated Rubber Products, Nec (3060), Adhesives & Sealants (2891)
- akta.pro primary industry
- Seals, Gaskets & Fluid Connectors (O-rings, packings, rotary seals, quick couplers) (IMAHAGAI)
- akta.pro secondary industries
- Seals, Gaskets & O-Rings (Industrial Elastomer) (IMANALAC), Adhesives & Sealants Chemicals (IMAEABAA), Sealants (Construction & Industrial) (IMAEAGAI)
Keywords
Where Sealing Devices is headquartered
LocationHeadquarters
- HQ city
- Lancaster
- HQ country
- United States
- HQ region
- North America
Offices4 records
Markets served
Sealing Devices business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Operations, Personnel, Marketing or Sales, Technology or R&D, Infrastructure
Revenue model
- Sealing Products Sales: Revenue from manufacturing, fabricating, and distributing sealing solutions including O-rings, gaskets, molded rubber parts, seals, EMI shielding, thermal management materials, and protective vents. Products are sold to industrial customers across aerospace, defense, electronics, and general industrial sectors.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Pay-as-you-go | Quote-based pricing for sealing products |
Go-to-market motion1 record
Distribution channels3 records
Marketing channels6 records
Sealing Devices product offering
Product offeringCore offering
Sealing Devices manufactures, fabricates, and distributes industrial sealing products including O-Rings, gaskets, molded rubber parts, EMI shielding, thermal management materials, sponge and foam gaskets, hydraulic and metal seals, and protective vents. The company also distributes partner brands (including the exclusive North American Gore protective vents line) and provides custom fabrication, value-added converting, and applications engineering services to aerospace, defense, electronics, industrial, and transportation customers.
Product overview
Sealing Devices is a manufacturer, fabricator, and distributor of industrial sealing solutions offering a comprehensive portfolio of products including O-Rings, Gaskets, Molded Rubber Parts, EMI Shielding, Thermal Management, GORE® Vents, Sponge & Foams, Seals, and Adhesives & Sealants. The company serves demanding industries including Industrial, Telecom & IT, Defense, Aerospace, Fluid Power, Electronics & Semiconductors, Rail/Marine/Bus, and Battery sectors. As the only North American distributor for W.L. Gore & Associates protective vents, Sealing Devices provides specialized solutions for pressure equalization, environmental protection, and acoustic management. The product portfolio includes both standard offerings and custom-fabricated solutions, with the company leveraging partnerships with major suppliers including Parker, Gore, 3M, Rogers, Saint-Gobain, Freudenberg, and others to deliver sealing solutions for critical applications in aerospace, defense, industrial, and electronics sectors.
Differentiator
Problem solved
Functional benefit
Products and services
- O-Rings Precision-engineered O-Rings manufactured in a range of elastomer compounds (FFKM, FKM/Viton, FVMQ fluorosilicone, Aflas, Buna-N, EPDM, Neoprene, and Silicone), providing general-purpose to high-temperature and chemical-resistant sealing for aerospace, defense, industrial, fluid power, and OEM customers.
- Gaskets Industrial gaskets including sheet gaskets, spiral wound configurations, and custom die-cut gaskets fabricated for sealing applications in demanding industrial, fluid power, aerospace, and chemical processing environments.
- Molded Rubber Parts Custom-molded rubber components designed for complex geometries and demanding environments, providing tight tolerances, durability, and repeatable performance for industrial and OEM sealing applications.
- EMI Shielding Electromagnetic interference shielding solutions (including Parker Chomerics materials) that protect electronic enclosures and components from EMI and ensure reliable performance in sensitive aerospace, defense, and electronics applications.
- Thermal Management Thermal interface materials and thermal management solutions managing heat dissipation for electronic, semiconductor, and industrial applications.
- GORE Vents (Protective Vents) W.L. Gore & Associates protective vents — including PolyVent High Airflow PRO, Gearbox, Adhesive, Screw-In, Snap-In, and Acoustic vent series — sold exclusively through Sealing Devices in North America. They enable enclosure pressure equalization while blocking water, dust, and contaminants for electronics, automotive, and industrial applications.
- Sponge & Cellular Foams Open-cell and closed-cell foam and sponge gasketing materials including Norseal silicone gasket rubber, BISCO cellular silicones, and PORON polyurethane foams for electrical enclosures, low-compression sealing, cushioning, and insulation applications.
- Seals Comprehensive industrial seals including elastomer V-rings/V-seals, metal seals, spring-energized seals, hydraulic seals, radial shaft seals, and press-in-place seals manufactured from rubber, PTFE, graphite, and metal for heavy-duty industrial, fluid power, and aerospace use.
- Adhesives & Sealants Pressure-sensitive adhesives, VHB tapes, epoxies, RTV silicone sealants, and threadlockers from 3M, LOCTITE (Henkel), Devcon, and Saint-Gobain for bonding, fastening, and sealing applications across industries.
- Fabric-Reinforced Diaphragms Custom diaphragms combining fabric reinforcement with elastomers to deliver flexibility, high tensile strength, and resistance to direct flame up to 2000°F for 15 minutes, designed for military, aerospace, and industrial applications.
- Fabrication and Converting Services Custom fabrication and converting capabilities including precision lathe-cut seals, custom extrusions, die-cutting, kiss-cutting, laminating pressure-sensitive adhesives to sponge and rubber substrates, and automated adhesive application for OEMs needing custom sealing components.
- Applications Engineering Support Consultative technical guidance from applications engineers with years of sealing industry experience, helping customers across aerospace, defense, electronics, and industrial sectors select and qualify the correct sealing solution for demanding applications.
Quantifiable outcome
- Fabric-reinforced diaphragms resist direct flame at 2000°F (1094°C) for up to 15 minutes
- +1 more outcomes
Companies that use Sealing Devices
Customer profileSegments6 records
Ideal customer profiles3 records
Sealing Devices technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature4 records
Sealing Devices partnerships and signals
Strategic signalPartnerships
14 partnerships are on record, tiered core and minor.
- Parker HannifincoreSealing Devices is an authorized Parker distributor supporting Parker Engineered Materials Group including O-Ring & Engineered Seals, Engineered Polymer Systems, and Composite Sealing Systems. Parker has been Sealing Devices' first product line and longest-standing supplier relationship for over 100 years of Parker manufacturing history.
- W.L. Gore & Associates (Gore)coreSealing Devices is the only North American distributor for protective vents made by W.L. Gore & Associates. This exclusive partnership has been in place for over 20 years, providing access to GORE vents for enclosure pressure equalization and environmental protection.
- 3MminorSealing Devices offers 3M pressure sensitive adhesives, VHB tapes, and adhesive products as part of their product portfolio.
- FreudenbergminorSealing Devices partners with Freudenberg for sealing materials and products including Norseal silicone gasket rubber.
- Saint-GobainminorSealing Devices offers Saint-Gobain products including Norseal foams, performance plastics, and high-performance bonding tapes.
- Rogers CorporationminorSealing Devices is a trusted foam fabricator and converter of Rogers PORON urethane and Rogers BISCO silicone foams.
- GarlockminorSealing Devices offers Garlock sealing products including FLEXSEAL spiral wound gaskets.
- CoorsTekminorSealing Devices partners with CoorsTek as a supplier of sealing materials and components.
- FlexitallicminorSealing Devices offers Flexitallic sealing products as part of their gasket and sealing solutions portfolio.
- Interface SolutionsminorSealing Devices partners with Interface Solutions for gasket materials and sealing products.
- JM ClipperminorSealing Devices offers JM Clipper sealing products as part of their product portfolio.
- Minnesota RubberminorSealing Devices partners with Minnesota Rubber for rubber sealing products and materials.
- Loctite (Henkel)minorSealing Devices offers LOCTITE threadlockers, adhesives, and sealant products from Henkel.
- WarcominorSealing Devices partners with Warco as a supplier of sealing materials.
Scale indicators3 records
Recent moves6 records
Expansion highlights5 records
Sealing Devices competitors and assessment
Company assessmentDirect peers
- Marco Rubber & Plastics: Marco Rubber & Plastics is a U.S.-based manufacturer and distributor of O-rings, custom-molded rubber parts, gaskets and sealing products serving aerospace, defense, oil and gas, and industrial customers — directly comparable to Sealing Devices' product mix and customer verticals.
- Hercules Sealing Products: Hercules Sealing Products is a U.S. distributor and fabricator of hydraulic seals, O-rings, gaskets and custom molded rubber components for fluid power, aerospace and industrial markets — overlapping product portfolio and distribution-led model with Sealing Devices.
- Allied Rubber & Gasket Company (ARGCO): ARGCO distributes industrial rubber products, gaskets, hose, and sealing solutions across mining, oilfield, and general industrial end markets — comparable distributor/fabricator model with overlapping sealing and gasket catalog.
- Greene Tweed: Greene Tweed designs and manufactures high-performance elastomer seals, O-rings and engineered polymer components for aerospace, defense, semiconductor and oil and gas — directly comparable engineered-sealing product overlap with Sealing Devices' molded rubber and seal lines.
- Minnesota Rubber and Plastics: Minnesota Rubber and Plastics is a custom molder of precision elastomer and thermoplastic components including seals and gaskets for medical, industrial and aerospace customers — overlapping custom-molded sealing capability with Sealing Devices' molded rubber parts business.
- Precision Polymer Engineering: Precision Polymer Engineering designs and manufactures high-performance elastomer O-rings and seals for semiconductor, oil and gas, and pharmaceutical markets — overlapping specialty elastomer seal focus with Sealing Devices' materials range.
- Stockwell Elastomerics: Stockwell Elastomerics fabricates silicone rubber, PORON and BISCO foam gaskets and EMI shielding gaskets for electronics and industrial enclosures — directly comparable silicone/foam gasket and EMI shielding overlap with Sealing Devices' product line.
Broad incumbents
- Trelleborg Sealing Solutions: Trelleborg Sealing Solutions is a global incumbent manufacturer of O-rings, hydraulic seals, rotary seals and engineered polymer sealing systems serving aerospace, automotive and industrial OEMs — a much larger broad-line competitor in the same sealing product categories.
- Parker Hannifin (Industrial Sealing): Parker Hannifin's Engineered Materials division manufactures O-rings, engineered seals and composite sealing systems and is also Sealing Devices' longest-standing supplier — a broad incumbent whose catalog competes with Sealing Devices' distribution offering.
- Garlock (EnPro Industries): Garlock, a brand of EnPro Industries, manufactures gaskets, sealing products and fluid handling solutions for industrial and chemical process customers — also a Sealing Devices supplier but competes broadly in industrial gaskets and fluid sealing.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
Sealing Devices social profiles
Digital presenceSealing Devices compliance and trust
Trust signalCompliance4 records
Sealing Devices financial estimates
Financial estimateRevenue estimate
Valuation estimate
Sealing Devices leadership team
Management profileNumber of profiles
Profiles2 records
Sealing Devices funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Sealing Devices M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Sealing Devices
What does Sealing Devices do?
Sealing Devices manufactures, fabricates, and distributes industrial sealing products including O-Rings, gaskets, molded rubber parts, EMI shielding, thermal management materials, sponge and foam gaskets, hydraulic and metal seals, and protective vents. The company also distributes partner brands (including the exclusive North American Gore protective vents line) and provides custom fabrication, value-added converting, and applications engineering services to aerospace, defense, electronics, industrial, and transportation customers.
Is Sealing Devices a public or private company?
Sealing Devices is a private company. It is classified as family owned and is currently operating.
When was Sealing Devices founded?
Sealing Devices was founded in 1963. It employs 251 to 500 people.
Where is Sealing Devices based?
Sealing Devices is headquartered in Lancaster, United States, in the North America region.
How does Sealing Devices make money?
One revenue line is on record: sealing Products Sales.
Who are Sealing Devices's main competitors?
Direct peers on record are Marco Rubber & Plastics, Hercules Sealing Products, Allied Rubber & Gasket Company (ARGCO), Greene Tweed, Minnesota Rubber and Plastics, Precision Polymer Engineering and Stockwell Elastomerics. Broad incumbents are Trelleborg Sealing Solutions, Parker Hannifin (Industrial Sealing) and Garlock (EnPro Industries).
Does Sealing Devices have an API?
No public API is recorded for Sealing Devices.
What industry is Sealing Devices in?
Sealing Devices's product category is Industrial Sealing Products & Gasket Manufacturing. Its primary akta.pro industry code is IMAHAGAI, Seals, Gaskets & Fluid Connectors (O-rings, packings, rotary seals, quick couplers), with a secondary code of IMANALAC, Seals, Gaskets & O-Rings (Industrial Elastomer). Its NAICS code is 339991 and its SIC code is 3050.