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3003 Silicone Coolant Standard Wall (3/16″) – Automotive / Coolant Hose

Meeting the requirements of SAE J20R1, Class A, standard wall construction, this 2-ply hose is recommended for those heavy-duty applications such as Class 7 and 8 trucks and off-road equipment. Featuring a silicone tube and cover, this hose is tough and resistant to extreme heat (up to +347°F), chemicals, oils and other elements that attack coolant hoses in heavy-duty applications.
Note: This hose is not suitable for fuel or oil transfer.

Technical Overview

Cover Color ■ Blue
Oil Resistance ■ High
Construction ■ Tube: Silicone
■ Cover: Silicone
■ Reinforcement: 2-ply polyester fabric, silicone coated
Temperature Range ■ -67°F to +347°F, -55°C to +175°C
Packaging ■ 5/8″ I.D. – 25 ft.
■ 3/4″ to 3″ I.D. – 60 ft.
■ 3-1/8″ to 6″ I.D. – 12 ft.
■ Other lengths available – 5% cutting charge


Thermoid Catalog – 3003 Silicone Coolant Standard Wall 316


Cancer and Reproductive Harm –

Features & Benefits

Silicone, RMA Class A Tube
  • High Oil Resistance
  • High Heat Resistance
  • Coolant Resistant
Silicone, RMA Class A Cover
  • High Oil Resistance
  • High Heat Resistant
2-Ply Polyester Fabric, Silicone Coated Reinforcement
  • Handles Coolant System Working Pressures in Class 7 and 8 Trucks and Off-Road Applications
-67°F to +347°F Temperature Range
-55°C to +175°C
  • Hose Has No Problem Functioning Even in Extreme Temperatures