SPEED SIX spark plug cover... Which silicon?

[g.beeton]

quick question...im changing my ht leads as ive got a misfire already changed the coil so leads are next

Which silicon and where do you buy?

Any advice would be great as ive seen it advertised
for £25 seems a bit steep

Surely its nothing too special and just high temp silicon

[Steve_T]

http://www.tool-net.co.uk/p-324040/everbuild-everf...

[g.beeton]

good price but min order £10 quid....might get 2 tubes

[g.beeton]

found this....free postage

http://www.positivehands.co.uk/products/Silicone%2...