I get all my casting materials from Alec Tiranti Ltd. Their website is
www.tiranti.co.uk, email [email protected]
I've been getting stuff from them for my professional work for twenty-odd years. Give them a try.
Sorry to disappoint, but I havn't actually done a whole slotcar casting. I use the RTV silicon rubber for all sorts of applications in my everyday work- there are lots of variations in curing time and durability depending on the particular type of catalyst you get. Some catalysts give a very flexible mould that is great when there are deep undercuts involved, but they tend to embrittle and are not so good for multiple use. For castings I use various grades of plaster. Not good for slot car shells.
But I have found Tirantis to be very helpful- they publish a lot of technical guides. So if you phone up and give specifications of what you want, you'll probably get the right advice. You just need a high impact strength resin that will take good surface detail.
QUOTE Which of the silicone moulding materials would you recommend and which resin for producing slotcars?
I had such a discussion with the man from Tiranti and was recommended a T28 silicone mould rubber used with T6 catalyst and Axson F16 2 part resin. I haven't used these materials yet but hope to make a cast of my "simple home-made lump of plaster '60s F1 car" shortly - will report my findings on the forum (unless it's a complete embarrassment in which case you imagined this post).
Just a tip - this stuff has a limited shelf life (around 6 months) so I wouldn't shell out until you're actually about ready to use it.
Btw howmet, when do you think you'll have my Brad Pitt look-a-like latex mask ready?
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