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Jan 15, 2021
5
0
1
South England
Member Type
DIY or Homeowner
Does anyone have any idea what clear silicony lumps and globules is in the rad water? It seems to have travelled to the air vent bleed valves. If I take the whole valve unit out, I can get it out OK with a turkey baster tube on a wet vac'. But if I just bleed the rad' using the key, the water jet starts off OK but then will stop, and a lot of screwing is need to get the lump stuff out the hole!
It's not silicon as it has not hardened nor is it water soluble and it is hard enough to block off the vent when in a gert lump, but then it can be forced out with a good pressure and some screwing so it must be malleable. Any ideas? Correct answer wins a Crackerjack pencil.
 
Some sort of leak sealer, perhaps? Does it harden when left in contact with air for a while?
 

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