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Micon Seals


Micon Seals Specifications


Micon Industries has spent years developing the HT Series Seals; the rubber formulation was developed specifically for radiators operating in all kinds of environments from everyday applications to the most extreme.  The HT Series Seals are completely oil & fuel resistant and can operate at extremely high or low temperatures for years.  The compound has incredible memory set resistance even after years of service in harsh environments.  The HT Series Seals are regarded as the very best by cooling system professionals worldwide.  Avoid failures and costly down time, use MICON HT Series Seals.

Next Generation Modular Radiator (NGMR) Seals

Micon now offers Next Generation Modular Radiator (NGMR) seals, the latest version of Caterpillar™ industrial radiator seals. Micon's NGMR seals have been formulated with their exclusive HT Series compound to ensure the seals offer the best heat & diesel / oil resistance in the industry.

NGMR seals


Aluminum Modular Radiator (AMR) Seals

The AMR seal (Aluminum Modular Radiator) is the next seal in the next generation series seals, commonly used in applications where Aluminum radiators are in place,  The aluminum radiators in these applications are shorter to allow for the expansion of the aluminum core, the seals have a thicker design to make up for the reduced height of the radiator.  AMR seals are made from the same HT series formulation and produced in a higher duro to endure the weight and expansion of the aluminum radiators.  These seals are available wherever Micon seals are sold and come with a two year warranty.

AMR Seals



Common OEM Seal Failures


Heat Exhaustion

This can occur when the operating temperature range of the rubber has been exceeded. The effects on the seal can include reduction of seal flexibility and hardening, leading to leakage.

Oil/Diesel Contamination

This is a common problem in cooling systems. If an oil cooler bundle leaks or a cylinder liner cracks, radiator seals can be exposed to fuel/oil through the cooling system. If the seals are not rated for these fluids they can start to absorb them, then often swelling up and becoming soft and "spongy". Once this occurs the radiators will begin to leak.

Incorrect Installation

Care must be taken to align the radiator with the seals. If a seal is "pinched" during reassembly it can often cause leakage on initial testing or reduce the service life of the radiator.


Seals Available

Seals Available:

HT 9Y1654
HT 9Y1655
HT 1606387
HT 1606386
HT 4P9942
HT 4P9943
HT 6I2431
HT 2725437
HT 2725438

HT 465-3189
HT 465-3190



Micon Grommets



After many years of grommet manufacturing we have added Viton (FKM) material as an grommet option. This material is made by Dupont and has been used in many manufacturing applications over the years.

Viton is known for it's proven heat resistance properties being able to handle 350-400 F on the high temperature end. This high temperature tolerance makes it a good choice for high temperature applications, such has high ambient temperature cooling systems and oil coolers.

Viton has good chemical resistance when it comes to oils-fuels and lubricants.

Viton also has good longevity, it will remain stable and functional for 4-6 years or more in cooling systems, this can effectively extend the rebuild intervals of radiators and therefore remain in service for extended periods, we are finding that some mining applications are now looking for this extended service to better match engine lifespan/rebuild cycles.

We started testing Viton in 2019 for fluid resistance and heat aging resistance and it has achieved impressive operating results.

We are confident that Viton will meet your tough jobs with successful results. These grommets are made to last longer and have a 2 year guarantee against material failure.

Part numbers:

VT-2663 Top grommet

VB-2665 Bottom grommet






Micon Grommets™ are used worldwide wherever Mesabi™ type radiators are employed.  Rebuild times are generally reduced by 30 to 50% due to compound formulation and physical engineering.  Our exclusive time released lubrication system built right into the compound allows for easier installation and reduces "Bake on" problems associated with other compounds.



  • Highly Modified Nitrile
  • Built-in Lubrication System
  • Oil Resistant 

Temperature Range   

  • -35F to +218F 

Service Life 

  • 3 years (approximately)
  • 15,000 service hours 


  • For use in all water based
  • Mesabi™ type radiators.

*Not for use in oil coolers*

Quality Control   

  • Constant attention to material durometer, dimensional specification and processing quality are maintained.


Corporate Headquarters


1120A McFarlane Way
Merritt, British Columbia
Canada  V1K 1B9







Warehouse Locations