Desmodur Supplier South Africa – For Polyurethane Systems

Desmodur is a dark-brown liquid polymeric MDI-based isocyanate blend containing diphenylmethane diisocyanate species and higher-functionality homologues, designed for use with polyols in polyurethane production. It is widely used in industrial formulations where strong adhesion, mechanical performance, and durable curing are required, including adhesives, sealants, elastomers, coatings, rigid systems, and structural foam applications. With strategic local stock in Johannesburg, Durban, and Cape Town, Massive Dynamic ensures reliable supply, full batch traceability, and expert technical support.

Key Performance Indicators

30.50–32.50%
NCO content
160–240 mPa·s1
Viscosity at 25 °C
≤200
Acid content

Why Choose Our Polymeric diphenylmethane diisocyanate (polymeric MDI)?

Consistent curing

Reliable NCO profile for polyurethane systems.

Industrial versatility

Suitable for adhesives, coatings, and elastomers.

Technical support

Specification, SDS, and formulation guidance.

Chemical Identity

Chemical name
Polymeric diphenylmethane diisocyanate (polymeric MDI)
Synonyms
Polymeric MDI; pMDI; MDI blend
Formula
Mixture
CAS
9016-87-9
Appearance
Dark-brown liquid

Technical Specifications

Physical Properties3

NCO content
30.50–32.50% (COA target)
Viscosity
160.0–240.0 mPa·s at 25 °C (COA target)
Acid content
≤200 (COA target)
Density
Approx. 1.23 g/cm³ at 25 °C (confirm against COA)
Storage
Store dry, sealed, and protected from moisture at 20–25 °C.

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Bulk drums of Desmodur stored in an industrial warehouse
Desmodur used in polyurethane adhesive manufacturing
Desmodur sample being tested in a laboratory

Key Applications

Polyurethane adhesives

Used as a hardener and reactive component in two-component polyurethane adhesives for strong bonding and fast industrial cure.

Sealants and caulks

Supports durable elastomeric sealants with good adhesion, flexibility, and chemical resistance for construction and manufacturing use.

Elastomers and cast systems

Ideal for cast polyurethane elastomers where abrasion resistance, load-bearing strength, and toughness are critical.

Protective coatings

Used in two-component coatings to improve durability, surface hardness, and resistance to wear and chemicals.️

Rigid foam systems

Applied in rigid polyurethane foam production for insulation, structural performance, and dimensional stability.

Automotive and industrial parts

Suitable for bonded assemblies and durable polyurethane components in transport, mining, and general industry.

Desmodur Supply Across South Africa

Massive Dynamic supplies high-purity Desmodur to major industrial centers across South Africa. Our strategic warehouse locations in Johannesburg, Cape Town, and Durban ensure rapid delivery and reliable supply chain management for your critical industrial processes.

Gauteng Region

Johannesburg • Pretoria • East Rand

Delivery within 24-48 hours

Western Cape

Cape Town • Stellenbosch • Paarl

Delivery within 48-hours

KwaZulu-Natal

Durban • Pietermaritzburg • Newcastle

Delivery within 48-hours

Packaging

Standard Options

  • Steel drums, typically 250 kg net
  • IBC tanks, subject to order volume and logistics

Documentation

Provided

  • Certificate of Analysis (COA)
  • Safety Data Sheet (SDS)
  • Technical Data Sheet (TDS)
  • Batch traceability and quality declarations

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Frequently Asked Questions About Desmodur

What is Desmodur used for?

It is mainly used in polyurethane adhesives, sealants, elastomers, coatings, and rigid foam systems where strong curing and industrial durability are required.

What are the typical specifications?

Typical COA data shows NCO content of 30.50 to 32.50%, viscosity of 160.0 to 240.0 mPa·s at 25 °C, and acid content not more than 200.

What forms and packaging are available?

This grade is supplied as a dark-brown liquid in industrial packaging, typically 250 kg steel drums.

What certificates and quality assurance are provided?

We typically provide a COA, SDS, and TDS, and quality declarations where required.

How should Desmodur be handled safely?

It should be handled as a reactive isocyanate using suitable PPE, moisture control, local extraction, and closed transfer systems. Avoid inhalation, skin contact, and exposure to water.

Is Desmodur suitable for South African industrial manufacturing?

Yes, it is well suited to South African adhesive, coating, foam, and elastomer manufacturers needing a reliable polymeric MDI supply for polyurethane systems.
  1. 1 Major industrial hubs; depending on stock available.
  2. 2 Typical parameters shown; exact results may vary per batch. You're welcome to request a COA prior to delivery.
  3. 3 Physical properties at standard temperature and pressure conditions unless otherwise specified.