Cheapest UK source for silicone?

[Knightjar]

I have a project coming up which is going to need a pretty large mould. I estimate if I'm careful I can get by with 5 litres of silicone, but that still works out pretty expensive most places. In the past I've tried using Vinamold for large moulds, with some success, but I think heating that volume would be tricky for me. Does anyone have a UK supplier with a relatively low cost RTV?

Many thanks!

 

[fettster]

Mouldlife

 

[Knightjar]

Mouldlife

Thank you.

Seeing their sprayable/brushable silicone made me reconsider my mould-making technique. I may be able to reduce the amount required by using that with a fibreglass supporting shell, since their shouldn't be many undercuts on my sculpt.