RTV2 Tin Cure Liquid Silicone Molding Rubber Brushing 28 Shore A
MCSIL-2028 RTV2 silicone rubber is a kind of two-component material, that is the
mold making silicone rubber made up of Part A base silicone and
Part B curing agent. The mixed Part A base silicone and Part B
curing agent can cure at room temperature by a condensation
reaction,then become a silicone rubber mold that can be used for
objects reproduction.
Item No. | Properties before curing | Curing |
| Part A | Part B | Part A+ Part B | Pot life at 250C | De-molding Time at 25℃ |
| Appearance | Appearance | Ratio | Viscosity |
| MCSIL-2028 | White | Clear | 100:2 | 36000±2000cps | 30-40 mins | 4-6 hours |
| Properties after curing 24 hours |
Hardness Shore A | Tear strength | Tensile Strength | Elongation break (%) | Linear Shrinkage |
| 28~30 | 30 N/mm | 4.2 Mpa | 450-500 | 0.2-0.4% |
FEATURES
1. High viscosity for Brushing way
2. Long working time
3. Medium hardness
4. High tear and tensile strength
5. Easy de-mould from complex replica parts
6. Acid and alkali-resistance
7. Low linear shrinkage(0.3%)
Applications
MCSIL-2028 RTV2 silicone rubber can be applied in the reproduction of cement
molding, concrete stones, artificial stones, plaster molding,
figures, art objects, decoration molding, GRC products, gypsum
products, resin products, PU molds. Etc.
How to make the silicone mold?
Cleaning
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
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.
Shelf Life
When stored at or below 30 C (85F) in the original unopened
containers, silicone base and CA30 Curing agent have a usable life
of 12 months from the date of production. After 12 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.
Package
Part A base silicone: 5kg, 20kg/drum, 25kg/drum or 200kg/drum
Part B CA30 Curing Agent: 250g, 800g/bottle, 1kg/bottle
Certificate
