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Monday 8am - 5pm Tuesday 8am - 5pm Wednesday 8am - 5pm Thursday 8am - 5pm Friday 8am - 5pm Saturday 8am - 5pm Sunday 8am - 5pm

Rothkopf

Name: Rothkopf
Address: 555 Spirit of Saint Louis Boulevard, Chesterfield, MO, 63005, US
Telephone: +16364492366

Wholesale distribution of molded rubber assembly components. Are you looking for molded rubber components? Turn to Rothkopf. They first opened a location in St.

We provide components like; o-rings, gaskets, seals, and custom parts, to manufacturers producing consumer products. Located in Chesterfield, MO, this rubber supplier offers high-quality precision molded products and O-Rings to clients around the country and globe. Rothkopf has been a leading rubber supplier since 1956. Louis, MO, under the name R.F. Carlson Company. In 1984, after John Rothkopf p

urchased the business, they rebranded to form Rothkopf & Associates Inc. Rothkopf offers standard, metric, and custom O-rings available for bulk purchase. Their O-rings are manufactured with a wide array of compounds, including urethan, silicone, teflon, or a custom formula. As a quality-focused rubber supplier they also comply with standards set by Mil-Aero, NSF, and the FDA. No matter what you need, you can trust them to build the right product for you. Not looking for O-rings? They can also supply other rubber products, including:

* Seals

* Lathe cuts

* Quad rings

* U-cups

Just like their O-rings, all rubber products can be custom-made based on your needs. Get rubber products made to your exact specifications when you work with Rothkopf. All standard and custom-made products can be shipped anywhere in the United States and around the world. Call (636) 449-2376 today to place your order. You can also visit them online to learn more about their customization process.

05/13/2026

Trade show season is here, and the Rothkopf team has been out and about meeting customers, connecting with new people, and spending time with some incredible exhibitors along the way!

We recently attended the D2P Show in Schaumburg, Illinois, and it was a great show with an awesome turnout. We truly appreciate everyone who stopped by our booth to chat and learn more about what we do.

Events like these are a great reminder of how valuable face-to-face conversations are and how strong the manufacturing community continues to be.

Thanks again to everyone who made the show such a success — we’re already looking forward to the next one! 👏

04/24/2026

OEMs shouldn’t have to become experts in rubber materials and components just to get the right parts they need— that’s where we come in.

At Rothkopf, our team has decades of hands-on expertise and a trusted global network of manufacturing resources. We don’t just supply components — we strengthen your entire supply chain.

Think of us as an extension of your team, delivering reliability, quality, and efficiency where it matters most.

Have a question about a part? Having issues finding a part? Visit our website or give us call.
🌐 rothkopf.com
📞 636-449-2366

02/24/2026

A poorly designed rubber component might seem minor in the early design phase…

But in the field? It can become the single point of catastrophic failure.

Seal engineering done right from day one isn’t a cost center —
it’s protection against downtime, warranty claims, safety risks, and damaged reputations.

When your product depends on sealing performance, the O-ring can’t be an afterthought. It has to be engineered with intention.

01/21/2026

From production to installation, every O-ring has a journey.

It may be small, but an O-ring touches every stage of the supply chain—manufacturing, shipping, inventory, distribution, and finally installation in a customer application.

When any one of those steps breaks down, the result can be costly:
❌ Production delays
❌ Idle equipment
❌ Unplanned downtime

That’s why strong supplier partnerships matter.

Reliable suppliers don’t just deliver parts—they deliver:
✔ Consistent quality
✔ On-time availability
✔ Proper stocking and logistics support
✔ Confidence that components will be there when and where they’re needed

For OEMs, that means production lines keep moving, maintenance teams stay ahead of issues, and operations run smoothly—without being disrupted by something as simple as a missing O-ring.

Because peace of mind isn’t built at installation—it’s built throughout the entire supply chain.

01/07/2026

In today’s industrial manufacturing landscape, component sourcing is about more than availability.

It’s about:
✔️ Building resilient supply chains
✔️ Maintaining quality without slowing production
✔️ Identifying the right partners before timelines tighten

Whether you’re launching new programs or reassessing current suppliers, a clear parts strategy can reduce risk and unlock efficiencies across your operation.

👉 Connect with us to assess your sourcing strategy for Q1 and beyond. Let’s plan ahead—together.

12/22/2025

🎄✨ On behalf of Lowly Oring and the entire ROTHKOPF team, we want to wish everyone a Merry Christmas & a very Happy New Year! ✨🎄

As a small, family-owned company, we are incredibly grateful for the relationships we’ve built and the opportunity to engage with and be of service to so many amazing people throughout the years. Every conversation, collaboration, and partnership means more to us than we can express.

Thank you for being part of our journey and for placing your trust in us. We look forward to continuing to grow together, create meaningful work, and serve our community in the year ahead.

Wishing you and your loved ones a joyful holiday season filled with warmth, peace, and happiness. 🎁🤍

— The ROTHKOPF Team

12/12/2025

Production lines depend on precision and reliability. That's why supply chains matter. Working with a trusted partner is critical. A dependable supplier ensures consistent quality, on-time delivery, and the expertise needed to keep operations running without interruption.

Rothkopf plays a vital role in the modern manufacturing supply chain—providing reliable sealing solutions and the confidence manufacturers need to build, scale, and innovate without compromise.

11/26/2025

Happy Thanksgiving 🦃 from everyone at Rothkopf!

We are grateful for the people, opportunities, and community that make each year better than the last.

Wishing everyone a warm, joyful holiday with those you love.

11/11/2025

To all veterans and active duty service members, thank you for your service, bravery, and sacrifice for this country. We are forever grateful for what you've done to maintain America's freedom. Happy Veterans Day!

10/31/2025

Wishing our valued customers, partners, and suppliers a day filled with fun, treats, and maybe just a few tricks. 🕸️

Thank you for continuing to be part of the ROTHKOPF journey — we appreciate your trust and collaboration all year round.

Stay spooky and safe out there! 🦇🧡

08/20/2025

Whether your products utilize "standard" components or "metric" components, or if you need a completely custom size, shape, material, profile etc. the right part in your application makes all the difference.

From the aviation industry to the automotive aftermarket industry to the medical industry, we know rubber so you can get back to what matters most—delivering high quality products to your customers.

Rothkopf assists our customers with...
✔️ Dimensions
✔️ Sizing
✔️ Materials
✔️ Certifications
✔️ Quantity Capacities

Who do you rely on when it comes to getting the best advice, guidance and service for your rubber assembly components?

Address

555 Spirit Of Saint Louis Boulevard
Chesterfield, MO
63005

Opening Hours

Monday	8am - 5pm
Tuesday	8am - 5pm
Wednesday	8am - 5pm
Thursday	8am - 5pm
Friday	8am - 5pm
Saturday	8am - 5pm
Sunday	8am - 5pm

Telephone

+16364492366

Website

https://www.rothkopf.com/

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