What
is it?
Aldax Silicone Putty is a two-part
RTV silicone rubber, non-toxic material with the viscosity of putty for
making simple but detailed moulds. The mould will withstand
temperatures up to 315°C. | This rubber does not
require moulds or containers which liquid silicon or our RTV rubber
requires. You simply mix equal parts of Part A was an equal quantity of
Part B which requires less time and skill in preparing the rubber ready
for application.
Simply put, it is the
fastest, easiest means of producing a reusable mould that is flexible
and accurate. Safety
It is safe to use and does not give off any toxic fumes. Those who are
allergic to silicone should still take all the necessary safety
precautions. For others there is no necessity to use gloves while
mixing. Silicone party comes in
two forms-a general-purpose putty and one that is manufactured with
food safety in mind that may be used in the manufacture of chocolates
and other food materials. |  |
Storage
Keep in a cool dark storage place with the lids firmly closed. If the
silicone putty is not exposed to air it will last for more than one
year.
Mixing
It comes in two parts, one of which is coloured differently to the
other to ensure easy and even mixing. There is no need to weigh the
silicone-simply estimate equal quantities of each part by eye and knead
the putty in your hands until an even colour without streaks has been
achieved. It is advisable to take only a minute or less to do this as
the silicone starts curing soon after mixing.
How to use
Immediately you have
finished mixing press the putty around or against the object to create
a firm impression and leave it to sit for between 5 to 10 minutes
depending on the temperature. Press the putty from the centre of the
object outwards to completely expel any air that may be trapped against
the face of the mould. |  | | It is essential do this to make sure air is
completely removed as putty has a tendency to trap air unlike liquid
silicone which pushes air ahead of the liquid as it gradually covers
the surface. |
A mould release is
unnecessary as silicone does not stick to other objects, however one
difficulty is that it can become entrapped in wood fibres and become
difficult to remove. The putty can in some cases due to its easy
release properties, fall away from the object being used as a model if
it is not supported in some way.
 | Unlike a mould made from
a liquid silicone you will not finish with a level base to facilitate
casting. A level base can be achieved by attaching two wooden strips
which you can attach to either side of the mould base with silicone
putty while making the mould. The finished mould when
removed from the object would then rest on the two wooden strips
providing a level base into which you can cast.
As a silicone putty
begins to set up in as little as three minutes after you have finished
kneading, you must work quickly. Extend the putty out to at least 1 cm
on all sides of the object to provide a level surface around the mould
opening.
As silicone will stick
to silicone any thin areas can be repaired by adding additional putty
to the completed mould. |
What can
the moulds be used for?
As the moulds can be safely used at oven temperatures they can be used
for polymer clothes or for liquid resin jewellery castings using either
polyester, epoxy or polyurethane resins. The special food safe resin
can be used for chocolates, sweets for gelatin.
Aldax Silicone Putty is available by
clicking here. By Stan Alderson
|