About Us
Hamilton Kent is a company that knows underground infrastructure. Our products
make infrastructure projects more watertight, more durable, more sustainable and less expensive to maintain. Learn more about
who we are, what we do , how we do it and
where we came from.
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Who we are

With locations in Toronto, Ontario and Winchester, Tennessee, Hamilton Kent is a multinational manufacturer and distributor of resilient-rubber, watertight, sealing systems and components. Focusing primarily upon seals for use with infrastructure pipe systems, we provide a complete package—from design and development, through production and testing, to warehousing and shipping.

As an ISO 9001:2000-certified company, quality permeates throughout all aspects of Hamilton Kent. The proof of Hamilton Kent’s commitment to quality lies in the numerous approvals that we have received from both national and international organizations, such as ASTM, CSA, UL, NSF, BS, DOT and AWWA.

What we do

Our custom manufacturing facility provides a diverse selection of molded and fabricated rubber products such as solar heating panels, industrial grade door seals, ladder foot-inserts, belt-guides, joint wraps, transformer seals and many, many more. Engineering and design assistance from our technical department is readily available when your special need arises.

For the pipe producer, Hamilton Kent offers an extensive line of gaskets—from simple o-rings to patented, pre-lubricated profile gaskets, such as the Tylox® SuperSeal. Hamilton Kent also has an extensive array of butyl-sealants, pipe joint lubricants, pipe plugs and other pipe related products.

For the manhole and/or structure producer, Hamilton Kent offers not only a variety of riser sealing products, but also a wide selection of pipe-to-structure connectors, for both cast-in or cored/formed hole processes. We are also the exclusive North American supplier of The Lifespan System, a watertight, corrosion-resistant manhole access frame, cover and adjustment-ring system.

For civil engineering applications, Hamilton Kent produces a variety of expansion seals for bridges and pavement.

How we do it

Compression Molding
Hamilton Kent’s compression mold department utilizes a bank of 18 presses, with pressure ranges from 50 Tons to 650 Tons and platen sizes from 18” x 18” to 42” x 42”.

Hamilton Kent has 4 extrusion lines, 3 with micro-wave/hot-air curing and 1 with salt bath curing. Utilizing single or dual-head extrusion techniques, HK’s extrusion department can produce continuous strip, in single or dualdurometer format, at up to 250Kg per hour and up to 13” wide profiles.

Once a rubber product has been molded or extruded, Hamilton Kent’s fabrication department isable to offer a number of finishing services to ensure you receive the product to your specification.

Injection Molding
Hamilton Kent’s Injection Mold department utilizes Five machines, with up to 400 Ton clamping force and mold sizes up to 32”x32”x10”, with volume capacity up to 366 cu.in.

As well as offering a selection of standard compounds, Hamilton Kent, utilizing its in-house compound development group, is able to formulate rubber compounds to meet the physical properties required by your specific application. Typical “standard” compounds include, but are not limited to:
• Polyisoprene Rubber (IR)
• Ethylene Propylene Diomene Monomer (EPDM)
• Chloroprene / Neoprene (CR)
• Nitrile / Buna (NBR)
• StyraButadiene (SBR)

Where we came from

1943 Founded in Kent, Ohio, molding rubber parts for the war effort
1946 HK develops initial design for rubber gaskets for concrete pipe, marketed as Type C Gasket
1957 Canadian manufacturing plant opened (Cooksville)
1981 Canadian manufacturing transferred to new plant (Toronto)
1985 HK splits into two separate companies HK-USA and HK-Canada
1987 1987 HK-Canada begins development of Pre-Lubricated gasket for Single-offset Jointed Concrete Pipe
1990 Pre-lubricated gasket product introduced into Canadian market as Tylox® SuperSeal™
1993 Tylox® SuperSeal™ introduced into U.S. market
1994 HK-USA liquidates
1998 Toronto plant expands to increase production capacity by 33% and enlarge the distribution center
2001 HK acquires assets of NC Rubber Products, Kitchener, Ontario. Plant upgraded to provide additional production and warehouse facilities
2006 HK-Canada forms HK LLC, a US-based company, which then acquires boot connector assets of International Precast Supply Haverhill, Mass; adding cast-in and mechanically installed boot connectors to product line
2007 HK builds state-of-the art manufacturing facility and distribution center in Winchester, Tennessee. U.S. distribution and manufacturing for TSS transferred from Toronto
2008 HK closes Reno, Nevada facility, and replaces it with larger Regional Distribution Facility in Tracy, California. Boot manufacturing transferred to Winchester, TN plant from Haverhill, which is then closed. Kitchener plant is closed and production transferred to Toronto
2009 HK begins selling and manufacturing The Lifespan System
2011 HK closes Tracey distribution facility, shifting distribution to the Winchester, TN plant

Sealing the Deal Part One: Best Practices in Gasket Selection
In the first of this two-part webinar series, Hamilton Kent's Alan Siebenthaler discusses how to choose the right gasket for your application. This webinar covers how to choose gasket type, selecting a gasket for joint design, material selection and gasket standards.
Watch Now. Click here  >>
Sealing the Deal Part Two: Best Practices in Gasket Quality Assurance
In the second of a two-part series, Hamilton Kent’s Alan Siebenthaler provides an overview of ACPA QCast quality assurance criteria, as well as best practices in gasket care, gleaned from Hamilton Kent’s many years in the business.
Watch Now. Click here  >>
Learn More
Sanitary Sewer
Storm Drainage
Domestic Water
Utility Vaults
Product Categories
Concrete Pipe Gaskets
Structure Gaskets
Manhole Access
Cored/Formed Hole Connectors
Cast-in Connectors
Plastic Pipe Gaskets
Connect and Stay Informed
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General Contact Information
Tel: 1 800 268 8479
Fax: 1 888 674 6960
Contact Hamilton Kent
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