Not Ranked
Flex or "soft" line is for use where the line must "flex"....hard line is for areas where it does not! Flex line is never recommended for long runs......you would need to install a "P" clamp every 3 inches to prevent it moving, vibrating and abrading the surface. While it may look "cool" it is not what it is intended for....
Don't know about the Russel line wicking vapors though...
Rick
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