It is a non-setting sealant for servicing spark plugs on various petrol engines from Renault.
PN: 8200168855
Names: Fluorinated Grease, Fluostar 2L
sold here at £33 inc. VAT
https://www.allcarpartsfast.co.uk/renaul ... ne-grease/
It is called silicone for an unknown reason - can be an error or a wrong product.
Fluostar 2L specs are here:
https://www.neukirch24.de/index.php?cat= ... dn68pnfaa2
Note: it is not a silicone grease - this one is based on fluorine.
This is a white grease, as thick as normal bearing grease, NLGI 2, -30....+240C, Perfluorpolyether+PTFE, no extreme pressure or anti-rust additives. Electrical strength not listed, the best I saw for this class of material is about 0.8kV/mm for general purpose second brands and 14...22kV/mm for aerospace Krytox 143 AZ...AC grades.
Silicone greases hold up to 204C, but they are incompatible with silicone rubber of coil boots.
Krytox GPL 206 and 207 seem to be suitable. They have no additives. Their temperatures are up to 260 and 288C. £41 for 2oz in the UK...
https://www.gbrockets.co.uk/store/motors ... rytox.html
Krytox GPL 205 holds max 205C, which is as good as the best silicones. No additives as well. £18 on ebay
https://www.ebay.co.uk/itm/Krytox-Oxygen ... 4897.l4275
!!!Silicone greases may not be applicable due to incompatibility with silicone rubber!!!
These are silicones:
Molykote Dow Corning G-5008, electrical strength, 42kV/mm! It looks like a champion even in comparison to the PFPE materials.
Loctite silicone dielectric grease has 19.8kV/mm.
RS Silicone Grease holds 21kV, £5 for 100g, available from RS.
Molykote Dow Corning 4 in aviation is used to seal the electrical connectors, protecting them from elements. Not suitable for the coils due to low electrical strength under high voltages 0.4kV/mm.
Someone has compiled a list of dielectric greases for ignition coils. Some of them are made with silicone, which may be incompatible with some coil boots if they are made with silicone rubber.
DIELECTRIC SILICONE GREASE
General Motors 12345579
Renault 8200168855
Beru 0890300029 или Beru ZKF 01
FLUOSTAR 2L
DoneDeal SILICONE DIELECTRIC GREASE (DD6807/56_г)
Ford Electrical Grease, Part No.: F8AZ-19G208-AA;
SLIPKOTE 220-R DIELECTRIC SILICONE COMPOUND или SLIPKOTE 220-R Silicone DBC Grease;