What Sealtech does

Sealtech (司达行 / Sealtech Company) is a privately held Hong Kong-headquartered industrial sealing solutions provider founded in 1991 by Liu Weijian (刘伟健). The company supplies sealing components, proprietary installation and measurement tools, and bilingual technical handbooks to customers across aerospace, petrochemical, coal mining, construction machinery, home appliances, automotive, water conservancy, shipbuilding, papermaking, pharmaceutical, and chemical fiber industries. Its primary customer segment is industrial manufacturers seeking to prevent leakage and equipment downtime in hydraulic and pneumatic machinery, with aerospace addressed under a Hong Kong Civil Aviation Department HPMA approval obtained in 2016.

The company's core technology rests on two proprietary systems developed in-house. The SMT (Sealtech Manufacturing Technology) processing center covers eight precision-machined seal families (SMT-0 dual-use seals through SMT-7 rotary shaft seals), while the SEALTOOL brand, launched in 2006, bundles specialized installation, measurement, cutting, and connector tools (Twistor rod seal benders, OR inserters, OR measurement cones in AS568 and JIS standards, deep-hole twistors, seal expanders, and Ultrasharp cutters). A CNAS-accredited in-house testing laboratory and a continuously updated bilingual SEALTECH Handbook (2021, 2025 editions) reinforce the technical offering. Certifications include ISO 9001:2015, AS9100:2016, AS9120:2016, ISO 14001:2015, ISO 45001:2018, CNAS laboratory accreditation, and HPMA aviation parts manufacturing approval.

Sealtech's business model is a direct-to-consumer e-commerce hardware sale operation. Products are listed on sealtech.com with publicly disclosed unit pricing ranging from approximately $40 to over $7,000, sold under a pay-as-you-go model through a multilingual storefront (English, Simplified Chinese, Traditional Chinese) plus a Vietnamese regional site. A 5% commission affiliate partner program, QQ and WeChat customer service integrations, and annual handbook releases serve as the principal marketing and customer acquisition channels. The company is family-controlled, has not raised institutional funding, and does not publicly disclose revenue.

Name

Sealtech

Legal name

Sealtech Company

Website

https://sealtech.com

Company type

Private

Founded year

1991

Operating status

Operating

Headcount range

11–50 employees

Short description

Sealtech is a privately held Hong Kong-founded industrial sealing solutions provider, supplying seals, proprietary SEALTOOL installation tools, and bilingual technical handbooks to manufacturers across aerospace, petrochemical, mining, construction, and process industries via direct e-commerce.

Ownership category

akta.pro rank

Product category

Industrial Sealing Components

NAICS

Gasket, Packing, and Sealing Device Manufacturing (339991), Other Rubber Product Manufacturing (32629)

SIC

Gaskets, Packg & Sealg Devices & Rubber & Plastics Hose (3050), Fabricated Rubber Products, Nec (3060)

akta.pro primary industry

Seals, Gaskets & O-Rings (Industrial Elastomer) (IMANALAC)

akta.pro secondary industry

Seals, Gaskets & Fluid Connectors (O-rings, packings, rotary seals, quick couplers) (IMAHAGAI)

Keywords

• Industrial sealing solutions
• Hydraulic seals
• O-ring products
• Seal installation tools
• Sealing components manufacturing

Headquarters

HQ city

Kowloon City

HQ country

Hong Kong SAR China

HQ region

Asia

Offices1 record

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. Product Sales: Revenue primarily from direct sales of industrial sealing products including seals, O-rings, seal tools, and related accessories through the company's e-commerce platform. Products are priced per unit with various sizes and specifications available.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

Sealtech supplies and distributes industrial sealing components (rod seals, piston seals, dust seals, rotary seals, guide/wear rings, O-rings) and manufactures precision-machined seals under the proprietary SMT (Sealtech Manufacturing Technology) system. The company also develops and sells the proprietary SEALTOOL brand of seal installation, measurement, cutting, and maintenance tools, and publishes comprehensive SEALTECH technical handbooks for seal selection and application guidance.

Product overview

SEALTECH is a specialized industrial sealing solutions provider offering a comprehensive portfolio centered on precision sealing components (seals and processed seal products), professional seal installation and maintenance tools, and technical documentation. The core product line includes hydraulic/pneumatic seals (rod seals, piston seals, dust seals, rotary seals, guide rings) and the SMT (Seal Machining Technology) precision-machined seal series. Supporting the product portfolio are specialized tools under the SEALTOOL brand, including Twistor installation tools, Ultrasharp cutters, OR measurement cones, seal expanders, deep hole twistors, power cylinder demonstrators, and connector kits. The company also publishes authoritative sealing handbooks (2021, 2025 editions) as technical reference materials. The entire product ecosystem serves industrial sectors including aerospace, petrochemical, mining, construction machinery, home appliances, automotive, hydraulic systems, shipbuilding, papermaking, pharmaceutical, and chemical fiber industries.

Differentiator

Problem solved

Functional benefit

Brands

• SEALTOOL: Self-developed sealing tool auxiliary product line launched in 2006

Products and services

• Industrial Seals (密封件) Industrial sealing components including rod seals, piston seals, dust seals, guide/wear rings, static seals, and rotary seals for hydraulic and pneumatic applications across multiple industries.
• SMT Precision-Machined Seal Series (密封件加工中心) Precision machined seal components under Sealtech's proprietary SMT system including dual-use seals (SMT-0), rod seals (SMT-1), single-acting piston seals (SMT-2), double-acting piston seals (SMT-3), dust rings (SMT-4), static seals (SMT-5), support rings (SMT-6), and rotary shaft seals (SMT-7).
• Twistor Series Rod Seal Benders (拉杆封扭合器系列) Specialized installation tools under the SEALTOOL brand that bend rod seals into Ω-shape without creating sharp edges, allowing safe passage over metal chamfers. Available in S, M, L, and XL sizes for different seal dimensions.
• Piston Seal Tightener (活塞封收紧器) Dual-purpose installation and tightening tool for piston seals that uses T-fixtures with cloth straps to simplify installation and restore seal shape after compression.
• Ultrasharp Cutters (特利剪系列) Specialized cutting tools for fiber-reinforced fabric guide rings and PTFE materials. Available in multiple sizes (2.5, 4.0, 60) with adjustable cutting angles of 45°/60°/90°.
• OR Measurement Cones (OR测量锥系列) O-ring inner diameter and cord diameter measurement tools. Available in AS568 standard (1A, 2A) and JIS standard (1J, 2J) variants for different measurement ranges.
• OR Inserter (OR嵌入器) Set of 6 different-sized O-ring installation tools for inner diameters 7mm to 20mm, allowing installation through protective sleeves into deep holes while avoiding sharp metal chamfers.
• Seal Expander+ (密封件扩张器+) Expansion tool for PTFE piston seals before installation, expanding seal diameter to allow passage over piston. Applicable range: 35-250mm.
• Deep Hole Twistor (深孔扭合器) Deep hole seal installation tool available in M (30-50mm bore) and L (50-70mm bore) sizes with maximum cord diameter capabilities.
• Power Cylinder Demo Series (动力油缸系列) Demonstration hydraulic cylinders that simulate hydraulic cylinder operation to show how seals prevent oil leakage. Includes mini portable, crystal display, horizontal, vertical, and rotary types.
• Connector Kit Series (连接器套装系列) O-ring and PU belt connection kits in three sizes (300, 700, 1400) for connecting rubber cords and PU belts of different diameters.
• Tool Kit III (工具套装III) Complete seal tool installation, disassembly, and measurement kit including seal extractor, special cutters, cutter blades, OR identification pen, seal hooks, diameter gauges, and groove depth/width calipers.
• SEALTECH Sealing Handbooks (密封件手册) Comprehensive technical reference handbooks providing sealing product specifications, material properties (rubber, polyurethane, PTFE), pressure/temperature ratings, installation dimensions, and application guidelines in Chinese and English. Includes 2021 and 2025 editions.

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration2 records

Feature3 records

Scale indicators2 records

Recent moves6 records

Expansion highlights5 records

Regional players

• Eriks (SHV Holdings): European-focused industrial distributor and manufacturer of seals, gaskets, and polymer products. Comparable scope but primarily serves European customers, providing a regional comparison point versus Sealtech's Asia-Pacific base.

Direct peers

• Marco Rubber: US-based O-ring and custom seal supplier with strong e-commerce distribution and engineering support. Comparable in go-to-market (DTC + technical content) and product mix to Sealtech.
• Apple Rubber Products: US-based manufacturer specializing in O-rings, custom molded seals, and seal design tools, with a strong e-commerce presence and technical handbook resources. Best small-to-mid sized Peer comparable to Sealtech's operational model.
• Daemar: Canadian distributor and manufacturer of industrial seals, O-rings, and seal installation tools — particularly comparable in the tools/accessories category and the mid-sized industrial supplier profile.
• Garlock (EnPro Industries): Specialist in fluid sealing products (gaskets, compression packing, hydraulic seals) for chemical, petrochemical, and pulp & paper — overlapping directly with Sealtech's process industry customer base.
• James Walker: UK-based manufacturer of industrial seals, gaskets, and expansion joints serving oil & gas, petrochemical, marine, and power generation. Comparable mid-sized industrial seal specialist serving similar process-industry verticals.
• Trelleborg Sealing Solutions: Division of Trelleborg AB, one of the world's largest manufacturers of precision seals, O-rings, and sealing tools for aerospace, industrial, and automotive markets. Direct competitor in the same product categories Sealtech serves.
• Freudenberg Sealing Technologies: Global leader in sealing technology, offering radial shaft seals, O-rings, custom molded seals, and sealing tools across aerospace, automotive, food, and process industries. Overlaps directly with Sealtech's product portfolio and customer verticals.

Broad incumbents

• Parker Hannifin: Diversified motion and control technologies giant with a substantial sealing portfolio (Parker O-Ring & Engineered Seals). Competes with Sealtech in hydraulic/pneumatic seals but operates on a much broader industrial base.
• Klinger (Rich. Klinger): Austrian-based manufacturer of static seals, gaskets, and expansion joints for process industries (oil & gas, chemical, power). Overlaps with Sealtech's petrochemical and chemical fiber segments.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/s-c-a-s

Compliance7 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 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 Sealtech