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Oil-filled radiators, I've seen the name glycol floating around. Is that what they're all filled with
If they're oil filled, it's not glycol since that's not an oil. There's stuff called diathermic oil, but it's hard to find in small quantities. Domestic units are not generally designed to be refillable, because if you lose oil you have a leak and you won't be able to repair that safely. Also, as a safety precaution, letting normals refill them will result in explosions because people will over fill them and the pressure from thermal expansion will pop the seams.
gbj_tester-
Appreciate the info. Not sure if this changes much around the not designed to be refillable point, but it's something along these lines (can't find the exact model, but this looks very similar), with a removable heating element: https://ecostrad.com/ecostrad-ascoli-iq/
Already opened the pair up, as one's heating element decided to stop working and the other was much hotter at the bottom than top (it was only half-filled), so took some oil from the dodgy element one and topped up (not literally) the other. So now in the market for a new element + some oil. Can find plenty of standalone elements to buy, but no mention of the oil.
mmccarthy
Oil-filled radiators, I've seen the name glycol floating around. Is that what they're all filled with (when they're not filled with water)? If so, where do I buy it? Got some radiators that seemed to have suffered some leakage in transit and want to fill them up.