EPDM based polymers out-perform those based on Silicone, when in contact with harsh OAT and high-hybrid OAT coolants. Below are the results of SHORE BOLT (Silicone-based) vs. SHORE+ (EPDM-based) elastomers, when tested for 500 hours at boiling point, with 50% Glysantin G30.
The above results re-validate our statement above, that EPDM based polymers out-perform those based on Silicone, when in contact with harsh OAT and high-hybrid OAT coolants.
Below flowchart can help you decide on which is the ideal HOSE for the various types of Coolants/Working Parameters.
4-ply reinforced Silicone. The ‘special’ reinforcement is capable of withstanding the gases which permeate the silicone liner and can damage the ‘polyester’ fabrics. Hence, the liner and the fabric are designed to withstand these gases for extended periods. Typical temperature range: -50 to + 215 degrees Celsius.
A special grade of EPDM reinforced with 1-ply Aramid. This option can only withstand -40 to + 150 degrees Celsius; however, it scores over the Shore-Master, when it comes to resistance to potassium/sodium 2-ethylhexanoic acids, which are sometimes present in OAT coolants.
However, with the SHORE BOLT+, you can now enjoy the best of both worlds (inner “Rubber” liner for coolant resistant, and outer “Silicone” liner for high under-the-hood temperature resistance).
The Shore Bolt+ is designed with an impermeable inner liner, which can give the hose an even longer life than the Shore BOLT, as the gases that can permeate the ‘silicone’ liner, cannot permeate this special ‘inner’ liner. The common mis-conception in the market is that an inner liner of Fluorosilicone adds to the protection. However, as per our testing, potassium/sodium 2-ethylhexanoic acids deplete the Fluorosilicone liner also very quickly. Our ‘special’ inner liner, hence, has been designed to withstand the harshest of chemicals/gases. Typical temperature range: -25 to + 225 degrees Celsius.