never seen that specified by energy suspension before.
Here's straight from there site in the FanQ section. Not trying to argue, just stating what i've read on there site.
Quote From Energy Suspension's Official Website:
"Both are our Energy's HYPER-FLEX™ performance polyurethane formulations. Energy has impregnated selected black polyurethane components with graphite — to add a lubrication property. Additionally, both Energy Suspension® red and black polyurethane components are engineered differently than OEM rubber components — to be free a floating and non-binding design. This allows for the additional durometer (firmness) of the components, which adds to the performance improvement of the vehicle overall.
"Through its 25 years of design and formulation of polyurethane, Energy's polyurethane components are the best on the market today."