Two-Component Pourable Liquid RTV-2 Tin Cure Silicone Rubber For
Making Molds For Plaster Mouldings
DESCRIPATION
Silicone rubber MCSIL-2030 is a two-component material, consisting
of Part A base and Part B MCSIL-CA30, cures at room temperature by
a condensation reaction.
PRODUCT FEATURES
1. Good flow ability and long working time
2. Medium hardness
3. High tear and tensile strength
4. Easy de-mould from complex replica parts
5. Acid and alkali-resistance
6. Low linear shrinkage
APPLICATIONS
MC RTV-2 mold making silicone rubber are suited for casting a wide
range of materials Polyester/ Polyurethane/ Epoxy resin, gysum/
plater, cemetns/ concrete , wax , Jewelry, shoe insole, etc.
Technical Data
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-2030 | White | Clear | 100:2 | 25000±2000 cps | 30-40 mins | 4-6 hours |
| Properties after curing 24 hours |
Hardness Shore A | Tear strength | Tensile Strength | Elongation break (%) | Linear Shrinkage |
| 30 | 28-30 N/mm | 3.8 Mpa | 450-500 | 0.2-0.4% |
USING INSTRUCTION
1-Take 100g of part A and add 2g of part B and mix the silicone
rubber and curing agent evenly.
2-vacuum pumping
Without exception, this step takes less than 10 minutes. Otherwise,
it will cause , and no more further steps will be available
3-Pouring mold or block mold of silicone rubber
The pouring way is an easy way to make molds, it's slowly and
evenly pour into the mixed silicon rubber into the square frame.
After the cross linking reaction.
Package
Part A base silicone: 5kg, 20kg/drum, 25kg/drum or 200kg/drum
Part B CA30 Curing Agent: 250g, 800g/bottle, 1kg/bottle
Certificates
Storage
When the silicone rubber is stored at or below 30 centi degree in
the original unopened containers, Silicone Base and Curing agent
have a usable life of 10 months from the date of production. After
10 months stockpiles use the Stir to mix the Part A silicone for
some minutes, then the silicone can be use again, no influence for
other performance.
Procedures of mold making by RTV-2 Silicone Rubber
1. Clean and prepare specimen (apply consolidant, sealant, or
release agent if necessary).
2. Build retaining wall around specimen.
3. Stir silicone base to loosen any settled material.
4. Decant desired amount of silicone into mixing container.
5. Mix in appropriate amount of catalyst.
6. Apply to specimen.
7. If reinforced mold is desired, gently press in gauze after
pouring fist layer.
8. When cured, gently remove mold from specimen.
9. If needed, create rigid backing or jacket over mold with
plastic,
urethane foam, or plaster.
10. Remove backing material and mold. Store mold inside rigid
backing.
