| Customization: | Available |
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| Material: | Organic Silicone |
| Application: | Industrial |
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Introduction of 2 Part RTV Silicone Rubber with Harddner for Concrete Gypsum Mold Making
The mixed Part A base silicone and Part B curing agent can cure at room temperature by a condensation reaction,and the become a silicone rubber mold that can be used for objects reproduction.These RTV2 silicone rubber molds can be cast into different material for your target objects.The pouring material can be plaster, polyurethane, PU, GRC, cement, resin, polyester, wax etc...
Characteristics of 2 part rtv silicone rubber with hardner for concrete gypsum
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
Technical data-sheet of 2 part rtv silicone rubber with hardner for concrete gypsum
Base and Curing Agent Mixture (100:3 by weight) in 25 °C (77F) testing
|
Item |
Mixing Ratio |
Color |
Hardness (shore A) |
Viscosity (cps) |
Working Time (25°C) |
Curing time (25°C) |
Tear- Strength |
Tensile- strength |
Elongation |
Shrinkage |
|
S815 |
100:3 |
White |
15±2 |
11000 ±3000 |
30-50mins |
3-4h |
22±3 |
≥3.3 |
≥500 |
≤0.2% |
|
S820 |
100:3 |
White |
20±2 |
14000 ±3000 |
30-50mins |
3-4h |
26±3 |
≥3.3 |
500 |
≤0.2% |
|
S825 |
100:3 |
White |
25±2 |
22000 ±3000 |
30-50mins |
3-4h |
26±3 |
≥3.4 |
400 |
≤0.2% |
|
S830 |
100:3 |
White |
30±2 |
24000 ±3000 |
30-50mins |
3-4h |
26±3 |
≥4.2 |
350 |
≤0.2% |
|
S835 |
100:3 |
White |
35±2 |
28000 ±3000 |
30-50mins |
3-4h |
25±3 |
≥4.5 |
350 |
≤0.2% |
|
S840 |
100:3 |
White |
40±2 |
15000 ±3000 |
30-50mins |
3-4h |
21±3 |
≥3.5 |
300 |
≤0.2% |
|
S845 |
100:3 |
White |
45±2 |
14000 ±3000 |
30-50mins |
3-4h |
20±3 |
≥3.3 |
250 |
≤0.2% |
Packing: 1kg/bottle, 5kg/tin, 20kg/25kg/200kg per drum
Shipping: by air & by sea
Delivery time: within 3-5 days after your payment confirmed in our bank
1. What's silicone products you are making?
--liquid silicone, silicone rubber, silicone oil; Due to different silicone molds, our silicone has different viscosity, and cause different hardness, density to meet the requests from client.
2. Do you offer free sample to client?
--Yes, we can provide the sample for test.
3. How about the quality control in your factory?
--We have professional QC team to control the quality during production. Goods will be 100% inspected before shipment.
4. How to remove the bubbles during my mould making?
--After mixing liquid silicone with curing agent, please put the material into vacuum machine to take off the bubbles.
5. How to get good silicone mould to use longer time?
--The best way is: #A, Please choose the right liquid silicone according to your products. #B, Don't use any silicone oil in mold making, because it can make the silicone mould become too soft to use. #C, Silicone mould can be used longer after the whole silicone mould fully cured, so it's better to wait 2 hours after mould finished.
6. Why silicone rubber add curing agent after mixing a lot of bubbles?
--This is normal physical phenomena. The liquid will produce a large number of bubbles in the mixing time, so, it must pass through the vacuum exhaust bubble treatment.
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