1. business and industrial
2. chemicals industry
3. plastics and polymers

A Moldmaking How-to Guide:
Steps in Creating
a One Part Mold
View our complete Moldmaking series
at www.quantumsilicones.com.
Creating a One Part Mold
Hot glue can be used to secure the model to the base
and in the center of the mold frame.
Apply mold release to the model and inside the mold
frame. Allow specified time to dry. Applying more than
one coat of mold release is recommended.
Step 1
Pour and weigh
part “A” (base)
in an appropriate
container on
a scale.
Step 2
Tare or zero the
scale and weigh
proper mix ratio of
part “B” (catalyst)
into the same
container.
Creating a One Part Mold (continued)
Using a clean stainless steel spatula, or
clean wooden stir stick, mix material until
it is uniform in color and minimal color
striations are visible.
Slowly mix the material in a folding motion
to ensure minimal air entrapment.
Step 3
Step 4
If necessary, once material
is sufficiently mixed, using
a vacuum pump with a
desiccator or vacuum
chamber is recommended
to evacuate air that has
been incorporated during
the mixing process.
As air is removed from the
liquid rubber, the volume
will temporarily rise and
expand about three times
its original volume.
Step 5
Pour the mixed silicone until reaching the top of the mold frame.
Allow material to fully cure. Most moldmaking products should
cure overnight (about 16 hours) to achieve best results.
Creating a One Part Mold (continued)
Step 6
1
2
Remove all sides
of the frame.
Gently remove
the master model
from the mold.
Clean the mold
as needed.
3
4
Creating a One Part Mold (continued)
Step 7
Prepare your casting resin as specified.
Pour a small portion of the casting resin
onto the outside of the mold to ensure
inihibition does not occur.
Moldmaking Silicones by QSi
Whether you are casting polyurethane foam, polyurethane resin,
polyester, gypsum, stones, or low melt alloys like bronze, you can
rely on QSi’s moldmaking silicones to consistently produce replicas.
QSi’s moldmaking materials have many key features that all play an
important role in the molding and duplicating process including:
Moldmaking Applications:
- Architectural
- Candles & Soap
• Low and high viscosities
- Dental
- Food Contact
• A wide range of durometers
- Prosthetics
• Various demold times
- Prototyping
• Translucent grades available that allow pigment to be added
- Sculpture & Figurine
- Special Effects
• High temperature resistance materials up to 225C
• Low shrinkage materials designed for highly complex
and intricate parts
• Materials for indirect food contact applications compliant
with FDA standards
• Room temperature and heat accelerated curing capabilities
• Liquid additives and multiple catalyst options for condensation (tin)
curing silicones are available to obtain your desired physical
properties or cure speeds. To view our complete series of specialty
product enhancers, please visit www.quantumsilicones.com.
QSi’s team focuses on building relationships and takes
time in asking you important questions to learn about your
project’s specific performance objectives. After gaining this
insight, our team will be prepared to recommend
optimal products that can help improve your application’s
productivity – as we have, and continue to do so for
customers worldwide.
What are you creating? Share your projects with us.
www.quantumsilicones.com
info@quantumsilicones.com
800-852-3147
Quantum Silicones
7820 Whitepine Road
Richmond, Virginia 23237