Inside Custom Gasket Mfg.: A Rubber and Gasket Molding Shop Built on Precision and Pride
The smell hits you first — that distinct, sulfurous bite of rubber being worked under heat and pressure. Inside a shop like Custom Gasket Mfg.'s facility in Englewood Cliffs, New Jersey, presses cycle with a steady rhythm, molds close and open, and finished parts come out clean, dimensionally tight, and ready to do a job that most people never think about until something fails. Gaskets and seals are invisible components in the machinery of industry, but get one wrong — wrong durometer, wrong compound, wrong geometry — and a hydraulic system leaks, a pressure vessel fails, a production line goes down. The people who make these parts understand that weight, and it shows in how they work.
Custom Gasket Mfg. has been operating since the 1970s, which means this shop has been molding rubber through recessions, supply chain upheavals, material shortages, and every other disruption American manufacturing has absorbed over the last five decades. That kind of longevity isn't an accident. It's what happens when a shop knows its craft, keeps its standards, and builds enough trust with its customers that they keep coming back.
Three Molding Processes Under One Roof
What sets Custom Gasket Mfg. apart technically is the breadth of their molding capabilities. Where many rubber shops are built around a single process, this operation runs all three primary rubber molding methods — compression molding, transfer molding, and injection molding — giving their engineering and production teams genuine flexibility to match the process to the part rather than forcing every job through the same setup.
Rubber compression molding is the oldest of the three, and in the right applications it's still the most cost-effective. Raw elastomeric material is placed directly into an open mold cavity, the press closes, heat and pressure cure the compound into its final shape. For simpler geometries, lower production volumes, or applications where tooling cost needs to stay down, compression molding remains a practical and proven approach.
Transfer molding bridges the gap between compression and injection. Material is loaded into a pot, then forced through sprues into closed mold cavities under pressure. The process produces tighter tolerances and better surface consistency than compression molding for more complex geometries, and it's particularly well-suited for encapsulating inserts or producing parts with fine detail that compression tooling can't reliably hold.
Rubber injection molding is the most controlled of the three — compound is metered, heated, and injected under precise conditions into a closed mold. Cycle times are tighter, consistency is high, and the process scales well. For customers running larger volumes of complex parts with strict dimensional requirements, injection molding is often the right answer.
Having all three capabilities in-house means Custom Gasket Mfg. can have an honest conversation with a customer about what process actually fits their part — not just what equipment happens to be available on the floor that week.
Rapid Prototyping and Reverse Engineering
Not every customer walks in with a clean CAD file and a full material specification. In practice, plenty of sourcing situations involve a worn-out part that needs to be replicated, a legacy component that was never formally documented, or a new application where the design is still evolving. Custom Gasket Mfg. has built their operation to handle these realities.
Their rapid prototyping capability allows engineers and procurement teams to move from concept to physical part quickly — critical when a production line is waiting on a component qualification or when a development program is under timeline pressure. Getting a molded rubber prototype in hand early in the design cycle prevents the expensive mistake of tooling a part that doesn't quite work.
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Perhaps more valuable for certain customers is their reverse engineering service. If a customer has a part but lacks a blueprint or technical drawing — a common situation with older industrial equipment, replacement parts programs, or situations where original supplier documentation has been lost — Custom Gasket Mfg. can work from a physical sample to reconstruct the geometry, identify the compound family, and produce a matching component. That kind of capability is a real lifeline for maintenance and reliability teams managing aging assets.
Who They Serve
The customer base here is deliberately broad. Custom Gasket Mfg. works across industries — and that's intentional. A rubber gasket or elastomeric seal is a fundamental component in fluid handling, pneumatic systems, pressure containment, electrical enclosures, and dozens of other applications across virtually every industrial sector. Automotive, aerospace, oil and gas, food processing, HVAC, medical equipment, industrial machinery — the list goes on.
Their ability to run both short-run and large-scale production is another practical differentiator. Not every customer has high-volume requirements, and many of the most technically demanding applications involve relatively low annual quantities of complex, tight-tolerance parts. A shop that can only make money on high-volume runs will push back on the small orders. Custom Gasket Mfg.'s setup allows them to serve customers across the volume spectrum without the awkward conversation about whether your order is worth their time.
Procurement managers and sourcing engineers doing due diligence can get a clearer picture of their capabilities and product range by going directly to Visit Custom Gasket Mfg. — their website is a useful starting point for scoping whether a particular application fits.
What Makes This Shop Different
Fifty-plus years in one business doesn't happen without doing something right. In rubber molding, what separates the shops that last from the ones that don't usually comes down to process discipline and materials knowledge — understanding how different elastomer compounds behave under specific cure conditions, knowing how tooling design affects part quality, catching a dimensional drift before it becomes a scrap pile. That kind of knowledge lives in people, and it accumulates slowly over years of hands-on work.
For a shop with 11 to 50 employees, Custom Gasket Mfg. punches above its weight class in terms of what they can offer. Three molding processes, prototyping, reverse engineering, multi-industry experience, and a track record measured in decades — that's a capable, dependable supplier profile for a part category that most OEMs and industrial operators genuinely can't afford to get wrong.
The other thing worth saying plainly: a shop in Englewood Cliffs, New Jersey, serving customers across the country, has earned its position by being good at the work. The Northeast corridor has plenty of sophisticated industrial buyers who have options. Keeping those accounts for fifty years requires consistency, responsiveness, and quality that holds up under scrutiny.
About Custom Gasket Mfg.
- Founded: 1970s
- Location: Englewood Cliffs, New Jersey
- Employees: 11–50
- Core Capabilities: Rubber compression molding, rubber transfer molding, rubber injection molding
- Additional Services: Rapid prototyping, reverse engineering
- Production Range: Short-run through large-scale production
- Industries Served: Multi-industry — automotive, aerospace, industrial, fluid handling, and more
- Products: Custom molded rubber gaskets, seals, and elastomeric components
- Website: customgasketmfg.com
Where to Find Them
Custom Gasket Mfg. is located in Englewood Cliffs, New Jersey — well-positioned to serve manufacturers and industrial operations throughout the Northeast and beyond. For sourcing inquiries, capability questions, or to explore whether they're the right fit for your application, start at their website:
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