Custom Rubber Compounding
Built to Your Spec
There’s no such thing as one-size-fits-all rubber. Every batch is produced to your exact requirements—no more, no less.
When your product faces heat, abrasion, chemicals, flex—or all of it at once—“close enough” isn’t acceptable. We help develop or refine the compound, then run it with the controls and documentation needed to deliver the same performance in production as in development.
What We Do
Compounding is the full story: designing the formula for your application, selecting materials, defining the procedure, and testing until it performs the way it should.
If you already own a formula, we can run it under controlled conditions, document the results, and help you move toward a production-ready program.
Our Compounding Toolbox
Strength, flexibility, heat, chemicals, abrasion—we tune the compound to the job. That means balancing performance targets with consistency and cost, without guessing.
From First Trial to Full Production
A good compound is a repeatable process. We build procedures that hold steady from early trials through production runs.
How a Compounding Program Runs Here
A simple, proven flow—enough detail to understand how we work, without getting lost in the weeds.
- Targets + application review
You share end-use conditions, performance goals, constraints, and timeline. - Formula strategy
Build from scratch or refine an existing recipe using practical material choices. - Trial batches + procedure definition
We set the procedure and run early batches to validate direction. - Testing + refinement
We test what matters for that compound or application. - Production-ready validation
Once it’s right, we lock in repeatability and documentation so production stays consistent.
Quality You Can Verify
We test, track, and document what matters—so your team isn’t dealing with surprises downstream.
- Mooney viscosity testing
- Rheometer & cure analysis
- Tensile & hardness testing
- Abrasion & chemical resistance tests
What this protects: uptime, scrap rates, and product consistency—especially when you’re running tight tolerances.
Our Setup
Mixing isn’t “toss it in and hope.” It’s controlled work—timing, temperature, sequence, and consistency. We’ve got the people and the equipment to run clean, repeatable batches.
Tangential Banbury Mixers
Two-Roll Mills
Extruder
Compounding vs. Mixing
Compounding is the design work—formula strategy, procedure definition, testing, and refinement until the compound performs the way it should.
Mixing is the controlled step of combining ingredients into a uniform batch—done consistently so the compound runs the same every time.
Already have a formula? We can qualify it for production.
If you own your formula, we can run it in our facility, document results, and support your path toward approved supplier status. You keep control of your recipe—and gain a reliable mixing partner.
What we can do:
- Run your formula under controlled conditions
- Verify consistency batch-to-batch
- Provide testing documentation
- Support supplier approval process (as required)
Built for Demanding Applications
From abrasion-heavy environments to heat and chemical exposure, we engineer batches to match the real conditions your product lives in.
Hose
Hose
Tires
Tires
Belts
Belts
Oil & Gas
Oil & Gas
Industrial Products
Industrial Products
Specialty Rubber
Specialty Rubber
Frequently Asked Questions:
Can you build a compound from scratch?
Yes. If you can tell us what the product is up against (heat, abrasion, chemicals, flex, duty cycle) and what success looks like, we can develop a compound and refine it through testing until it meets the target.
Can you run our existing formula and help with supplier approval?
Yes. We can run customer-owned formulas under controlled conditions, document results, and provide the testing package needed for many supplier qualification processes.
What testing do you provide with batches?
Common testing includes Mooney viscosity, rheometer/cure analysis, tensile and hardness, and abrasion/chemical resistance tests when required by the application.
What equipment do you run?
We support compounding programs with Banbury mixing, two-roll mills, and extrusion capability—matched to the job requirements.
What’s a typical lead time?
Lead time depends on whether you’re in development or production, material readiness, and current scheduling. Send your targets and timeline—we’ll give you a straight answer.
Let’s talk about what you’re building.
Send us your performance targets, your timeline, and what you’re up against. We’ll give you a straight answer on the best path—custom compound, formula qualification, or production mixing.
Eau Claire, WI
Rubber Mixing & Extruding
800 Wisconsin St. #11
Eau Claire, WI 54703
Topeka, KS
Pre-Weigh Facility
7215 Topeka Blvd.,
Building 9A
Topeka, KS 66619
Fayetteville, NC
Pre-Weigh Facility
318 Blount Street
Fayetteville, NC 28301
Danville, VA
Pre-Weigh Facility
121 Martha Street
Danville, VA 24541
Lawton, OK
Pre-Weigh Facility
5201 SW 11th Street
Lawton, OK 73501
Useful Links
Contact Us
sales@apimix.net
Phone
Sales: (715) 831-0966