Can anyone suggest any alternative casting mediums that are available
in the UK by post or in Birmingham for use with rubber moulds such as
What about mediums such as resin. Anyone know if it will react with
the rubber moulds?
It's really funny, but I've asked roughly the same question in
rec.models.railroad this morning. Original post below. Please could you post
back to either newsgroup if you get any advice/suggestions and I miss them?
I'm very new to modelling after finding myself at home now. I have been
looking at moulds from Linka
and I would like to try to
find a way of making (or buying online) a cheap moulding medium that sets so
I can work it with hand tools when set (like wood). Plaster of Paris seems
too brittle for my cumbersome fingers.
Has anyone found a mixture that they mould fine details with, that is
inexpensive to buy, or has anyone made a magic formula they could share with
me? I am not a tight-wad, I'm disabled, and funds are low).
Any help or suggestions will be really helpful to me, and thank you for
Have you seen the Linka Yahoo Group? A bit slow but still active:
I have already tried Poly Filler (crack filler) but that is too
brittle in such thin wafers though I need to try it at a thicker
I might try adding fibres but that has other (hairy wall) problems :)
I wondered about resin \ stone mixtures but need to find out if that
will affect the rubber.
Likewise I thought about concrete (no sand) but that can be caustic.
From various sources so far I have this rough list:
I am compiling a list of web based stockists also.
If you want to share and add to findings as they grow e.mail me at
I am only just getting started with all this so a bit slow at the
moment but I think I'll be doing some experimentation and possibly
casting my own moulds and templates later on.
I would ditch all those in favour of a bag of B&Q finishing plaster which
is pretty well the same stuff at a third of the price. And if that comes
out too brittle stick some PVA in the mix.
Have you tried paper mache? Properly made paper mache that is?
Have you tried Finishing Plaster in a Linka mould?
I did think about PVA but found it made concrete slightly more
crumbly. I might try it with some Poly Filler as a test though in
general it is used to water proof rather than polymerise.
I have used paper mache to great effect in making retro boxes
including paper mache hinges and locks. I guess it would have to be
pretty fine to take the brick imprint from a mould and would need to
have an anti shrinkage component added?
I was actually quite surprised by how thin the Linka moulds were.
The best medium I suspect will be some form of resinated material.
I was thinking that if resin affects the rubber I could cast in wax,
turn out another negative in plaster and then cast in resin....
Your suggestions are worth experimenting with though as many people
have had some disappointment with the LinkaLite compound.
I don't think much has changed in that time, other than one or two additions
to the range.
I think we might have the casting powder in stock - if you'd like me to
check contact me off list.
Scola cast, on-line from various craft suppliers, when baked GENTLY,
after 24 hours out of the mould, its really hard and not brittle, takes
fine detail very well too. Even my Beaver Scouts can handle casting fine
detail (for fridge magnets) with it!
I usually buy BIGGER bags, but it depends on what you need, craftpacks
are good people too, just down the road from me so I can visit easily
for some useful stuff, got a set of brewery vehicles for a fraction of
retail last year....