Silicone Heater Hoses

70526 Series Silicone Heater Hoses Product Specifications

This 2-Ply Silicone Hose is used for coolant transfer applications and higher temperature service. These extruded heater hoses meet or exceed the requirements of the SAE J20 R3 Class A specification. The silicone houses are reinforced with polyester fabric. Heater hoses are resistant to coolant solutions, cold leaks, cracking, peeling, aging and ozone but not recommended fuel or oil transfer use.  


  • No. of Plies:  2
  • Chemical:   Good
  • Flexibility: Excellent
  • Abrasion – Interior/Exterior:   Good/Good
  • Pressure: Positive
  • Tube: Silicone/HDPE
  • Reinforcement: Polyester Fabric
  • Temperature: – 65°F to +350°F
  • Lengths: 25 to 50 feet
  • Color: Blue

Options:  Length available per reel up to 250 feet. An aramid fiber reinforcement is available for high temperature applications up to +500°F

Features and Benefits of Silicone Heater Hose:

  • Resistant to a wide range of temperatures
  • Resistant to hardening, cracking, ozone attack, sunlight
  • Resistant to moisture, steam, dust, aging, various pressure ranges
  • Resistant to many chemicals
  • Retains flexibility in hostile engine environments
  • Excellent electrical insulating properties
  • Longer life than EPDM (Black Rubber)
  • Tube: Red silicone for superior heat resistance to 500°F
  • Reinforcement: Multiple textile plies for strength and kink resistance.

Cover: Blue silicone for superior temperature resistance and easy identification


  • Coolant transfer in heater and coolant circuit
  • DEF System
  • Buses
  • Construction equipment
  • Off-road equipment
  • Trucks