What liquid is used in my towel rail?

The following towel rails (manufactured since 2015) use a 85%/15% mixture of water/glycol. In normal operation, the fluid within the towel rail is sealed in place. 

If, in the unlikely instance that there is a leak, see attached MSDS safety datasheet for the 15% glycol. If there is a leak, the towel rail cannot be safely be refilled at home, as the filling process is done in a controlled environment to ensure correct expansion during use. 

Applicable to models: TRM21W4, TRM14W5, TRM21W5, TRM28W5, TRM21C4, TRM14C5, TRM21C5, TRM28C5, CTR7W, CTR7C, CTR10W, CTR10C, CTR12W, CTR12C, CPTS, CPTSW, BR150C, BR350C, BR400W, TDTR175W, TDTR350W, TDTR175C, TDTR350C, TTRC90/W, TTRS120/W, TTRC130/W, TTRC150/W, TTRS175/W