RTV-2 Liquid Silicone Rubber For Making Mold For Resin Statue
Sculpture
DESCRIPATION
Silicone rubber MCSIL-2020 is a two-component material, consisting
of Part A base and Part B MCSIL-CA30, cures at room temperature by
a condensation reaction.
APPLICATIONS
MC RTV-2 mold making silicone rubber are suited for reproduction of
cement molding, concrete stones, artificial stones, plaster
molding, figures, art objects, decoration molding, GRC products,
gypsum products, resin products, PU molds, etc.
FEATURES
- Good flow ability and long working time
- Medium hardness
- High tear and tensile strength
- Easy de-mould from complex replica parts
- Acid and alkali-resistance
- Low linear shrinkage
Tin series good for pouring mold making
Base and Curing Agent Mixture (100:2 by weight) in 25 C (77F)
testing
Item No. | Character before curing | Curing |
| Part A | Part B | Part A+ Part B | Pot life at 250C mins | De-molding Time at 250C hours |
| Appearance | Appearance | Mix Ratio | Viscosity cps |
| MCSIL-2020 | White | Clear | 100:2 | 23000±2000 | 30-40 | 4-6 |
| Character after curing 24 hours |
Hardness Shore A | Tear strength (N/mm) | Tensile Strength(Mpa) | Elongation break (%) | Linear Shrinkage |
| 20 | 30 | 3.8 | 520 | ≤0.3% |
| | | | | | | |
How to make the silicone mold?
- The surface of the original should be clean and free of loose
material. If your products with thin flower patterns, and
especially with porous substrates, please use a suitable mold
release agent such as soap water, detergent, Vaseline or petroleum
jelly.
- Mixing
Please weight 100 Part A base and 2 parts of Curing Agent in a
clean container. Thoroughly stir Part A base silicone before use,
as filler separation may occur upon prolonged storage. Mixing Part
A and Part B evenly until the CA30 completely dispersed in the
base. Hand or mechanical mixing can be used, but do not for an
extended period of time or allow the temperature to exceed 35C
(95F). Mix suitably small quantities to ensure thorough mixing of
base and curing agent.
It is strongly recommended that entrapped air be removed in a
vacuum chamber, allowing the mix to completely expand and then
collapse. After a further 1-2 mins under vacuum, the mix should be
inspected and can be used if free of air bubbles. A volume increase
of 3-5 times will occur on vacuum de-airing the mixture. So a
suitably large container should be chosen.
Pouring the mixture and curing
Pour the mixed Part A base silicone and part B the curing agent as
soon as possible onto the original, avoiding air entrapment. The
catalyzed material will cure to a flexible rubber within 6 hours
(or faster by different mixing ratio or room temperature), we
advice you de-mold after 24 hours, it is will improve the replicate
times of silicone mold.
STORAGE
When stored at or below 30 C (85F) in the original unopened
containers, silicone base and CA30 Curing agent have a usable life
of 10 months from the date of production. After 10 months stock,
please use the Stir to mixing the Part A silicone for some mins,
then the silicone can be use again, no influence for other
performances.
Packaging
20kg 25kg, per drum, 200kg per drum
Storage and shelf life
MC Silicone MCPLA -H Series should be used within 12 months from
the manufacturing date. Beyond this date, MC silicone no longer
guarantees the products confirms with the sales Specification. In
order to preserve best properties it is recommended to follow
strictly the following guild lines:
Store the original packing tightly sealed and at a temperature
below 30 degree Celsius.
Use the product as soon as the packaging has been opened.
