Belzona 2221 (MP Fluid Elastomer)

A tough, flexible multi-purpose polyurethane elastomer for the repair and coating of rubber components and metal surfaces and casting of new components.  

Belzona 2221 (MP Fluid Elastomer)

A 2-part polyurethane resin designed for the repair and coating of rubber and metal components, as well as casting of new components. This flexible rubber repair material makes cost effective repairs possible and is designed for applications where durability and elasticity are required. It is easy to mix and apply by brush or by pouring without the need for specialist tools and will cure at room temperature, eliminating the need for hot work and vulcanisation.

Key benefits:

  • Application and cure at room temperature - no hot work involved
  • Can be used for casting applications
  • Excellent adhesion to a wide variety of substrates including natural rubber, nitrile, neoprene, SBR (Styrene Butadiene Rubber), polyurethane, PVC, steel, copper and concrete
  • Reduced health and safety risks as it is solvent-free
  • Seamless application small or large areas treated in one operation
  • Good chemical resistance to a wide variety of chemicals
  • Outstanding elongation – up to 700%
  • Good electrical resistance
  • Protection against erosion and corrosion

Applications for Belzona 2221 (MP Fluid Elastomer) include:

  • Creation and repair of concrete expansion joints to provide long-term performance
  • Creation or casting of gasket seals
  • Cold curing alternative to vulcanized rubber repair of rubber linings
  • Sealing SF6 gas leaks providing environmental protection
  • Casting of new rubber components
  • Protection of exposed threads
  • Fast rubber repair of holes and cracks on pump diaphragms
Key technical data:
Working life at 25°C (77°F)  15 minutes
Time to full mechanical cure at 25°C (77°F) 18 hours 
Shore A Hardness (ASTM D2240) 65
Elongation tested with ASTM D412 (Die C) 700%
Volume capacity (750g unit) 660cm³ (40.28 cu.in)
Coverage rate (750g unit) 1.76 sq.m. (18.9 sq.ft) at 375 microns (15 mil) thickness
Adhesion to mild steel (ASTM D429) 150 pli (2678 kgs/m)
Bonds to Rubber, PVC, aluminium, concrete, copper, steel, stainless steel, cast iron, lead, glass, wood, most plastics and many more
Typical applications Coating, lining, patch repairs and many more
Unit size 750g. Pack sizes may vary locally.
Availability* Global

* All products are subject to regional restrictions. Check with your local Distributor for more information


More information:

For more information about Belzona 2221 (MP Fluid Elastomer) contact us or find your local distributor.

You can apply to join Belzona Connect to access additional information including SDS and instructions for use.

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