Do you sell to small formulators or only large OEMs?

Both. We support OEM volumes through our Pittsburg, KS plant and routinely run pilot-scale batches for startup chemical companies, university labs, and specialty formulators. There is no minimum to start a conversation.

Can MCPU help me replace TCPP in my PIR formulation?

Yes. Yellow Jacket™ FR is engineered as a 1:1 halogen-free replacement for TCPP in polyisocyanurate boardstock and rigid spray foam, and we will work directly with your formulation team to qualify it on your line.

What bio-content options does MCPU offer?

Our Honey Bee® line of reactive soy-based polyols carries USDA BioPreferred-eligible renewable carbon and is used in flexible furniture foam, spray foam, and CASE applications.

How do I start working with MCPU?

Send a non-confidential summary of your performance target through the Contact form. An MCPU chemist replies within one business day, we put an NDA in place, then review your existing formulation and target specification before any bench development, testing, trial or sample.

MCPU lab bench with amber polyol samples in a beaker and flask, rigid and flexible polyurethane foam blocks and a pipe-insulation section, with archival chemists at work behind

Polyurethane Polymer Engineering · Roots to 1937, founded 1965

Polyurethane innovation that solves your toughest formulation problems.

For 60 years MCPU has engineered novel polymers, halogen-free flame retardants, and renewable reactive modifiers that other suppliers told customers were impossible. Bring us your hardest spec — we’ll formulate to it.

Roots to 1937, founded 1965

Polyurethane innovation that solves your toughest formulation problems.

For 60 years MCPU has engineered novel polymers, halogen-free flame retardants, and renewable reactive modifiers that other suppliers told customers were impossible.

Featured chemistries

Solutions

We catalog our chemistry by the formulation problem it solves. Pick your pain point.

All solutions

Yellow Jacket™ FR

TCPP-Free & Fire Performance

Halogen-free flame retardancy for PIR, rigid SPF, and flexible foam, developed against ASTM E84, UL 723, and CAN/ULC-S102 targets with a cleaner smoke profile.

Yellow Jacket™ TR

R-Value & Thermal Performance

Reactive cell-structure modifiers that tighten closed-cell morphology for lower K-Factor and a flatter long-term thermal aging curve.

Yellow Jacket™ Additives

VOC & Catalyst Reduction

Low- and zero-VOC polyols and reactive modifiers that keep sprayability, green strength, and substrate adhesion while reducing fugitive amine catalyst.

MCP Polyols

Moisture / Hydrophobicity

Hydrophobic polyols and reactive modifiers that hold properties through wet, humid, and buried service environments.

MCP Polyols & Binders

Energy, Sound & Vibration Absorption

Viscoelastic elastomer and foam systems tuned for damping, impact attenuation, and noise control.

Yellow Jacket™ Additives

Tg & Viscoelastic Control

Shift and broaden the Tg window of flexible and viscoelastic systems with a single reactive additive, instead of rebuilding the formulation.

MCP Polyols & Binders

Toughness, Tear & Demolding

Reinforce the polymer matrix for tear resistance and faster green strength while holding tensile and elongation.

Honey Bee® Soy Polyols

Renewable / Biobased Content

Reactive soy polyols that raise biobased content toward USDA Certified Biobased Product labeling without giving up performance.

Engineered product families

Three product lines, all reactive, all engineered to do something a commodity SKU can’t.

MCPU chemistries

MCPU Product

Yellow Jacket™

Halogen-free flame-retardant additive system for rigid PIR & polyurethane foam.

Spec sheet & chemistry Visit yellowjacketadditives.com

MCPU Product

Honey Bee®

Reactive soy-based polyols and modifiers for resilient, lower-carbon polyurethanes.

Spec sheet & chemistry Visit honeybeesoypolymers.com

MCPU Product

Specialty Polyurethane Systems

Custom polyol systems, encapsulants, fluid-applied roof coatings, and rubber-crumb binders.

Spec sheet & chemistry

MCPU Product

Custom Formulation Development

Bench-to-plant formulation development, reverse engineering, and toll-blended production.

Spec sheet & chemistry

Industries we serve

Insulation: PIR boardstock & spray foam

Higher R-value, halogen-free FR, faster cure — without re-tooling your line.

Construction coatings & sealants

Fluid-applied roofing, joint sealants, and protective coatings built to last decades.

Furniture & flexible foam

Bio-content seating that meets resilience, durability, and FST targets.

Flooring & athletic surfaces

MDI moisture-cure binders for tracks, playgrounds, and weight-room flooring.

Electronics & filtration encapsulation

Low-exotherm, low-shrink potting that protects sensitive assemblies.

Industrial filtration

End-cap potting compounds engineered for your filter geometry.

Why formulators choose MCPU

Formulation-first

Every product was built to solve a customer problem first, then catalogued — never the other way around.

U.S. manufacturing

On-shore production with redundant supply, rapid iteration, and small-lot pilot capability.

Novel chemistry

Reactive modifiers, halogen-free FRs, and bio-content polyols you won't find in the commodity catalog.

Regulatory ready

Halogen-free and low-VOC routes away from restricted chemistries — TCPP, halogenated FRs, high-VOC carriers.

Renewable inputs

USDA BioPreferred-eligible polyols and lower-carbon chemistries available across product lines.

60 years of polyurethane firsts

1960s
Tartan™ tracks
The first polyurethane athletic running surfaces came out of MCPU chemistry.
1970s
Clay-pipe sealant
Novel one-part PU sealant for municipal sewer joints — still spec'd today.
350M+ lb
Production to date
Polyurethane produced by MCPU across coatings, foams, binders and specialty systems.
2020s
Yellow Jacket™ FR
Halogen-free TCPP replacement built ahead of the regulatory phase-out.

Bring us your toughest PU challenge

Start with a non-confidential summary. We'll take it from there.

Tell us the performance target in non-confidential terms. If it is a fit we put an NDA in place, review your existing formulation and specification, then move to bench development, testing, customer trial and scale-up.

Discuss Your Formulation

Frequently asked questions

Quick answers from our formulation team. Don’t see yours? Ask a chemist.

Want to dig into the chemistry first?

The MCPU resource hub covers TCPP phase-out, R-Value vs K-Factor, bio-based polyols, and FST testing — written by formulators, for formulators.

Visit the resource hub