YJS-520 tin cure rtv2 silicone rubber for art foundry casting
Category: Foundry casting silicone  Publish Time: 2018-08-07 11:09 
YJS-520 is medium hardness, tin-cured silicone rubber with a 100A:2B mix ratio (digital scale required for measuring) and 3-4 hour demold time.
 1.Description
YJS-520 is medium hardness, tin-cured silicone rubber with a 100A:2B mix ratio (digital scale required for measuring) and 3-4 hour demold time. It Can easily be thickened with Liquid Thickener for brush-on application.

2.Technical Datasheet

Typical general characteristics Inspection Method Value
Product data (Catalyzed A+B) YJS-520
Hardness Shore A 20±2
Mix Ratio A:B 100:2
Color / white
Pot life 25 °C (77F) 30-40
Curing time 25 °C (77F) 3-4
Mixed viscosity mPa.s ≥3.1
Tear-strength kg/cm 20±2
Tensile-strength M.pa 18000±2000
Elongation % ≥480%
Shrinkage % ≤0.2%   

Note: This is a 100A:2B mix ratio product that must be measured by weight. The choosing of suitable hardness should be according to the size and pattern design of the products. If large products and therefore multiple-piece molds are needed by customers, silicone rubber with higher hardness will be required for the molds. Conversely, soft silicon is indispensable for molds with complicated pattern and delicate details. The amount of curing agent admixture depends on the actual need of customers. More will be added for speedy drying and fast release and less when otherwise.

3. FEATURES
1.No oily surface on the cured mold
2.Low viscosity
3.Extra low shrinkage
4.Pouring and brushable silicone
5.High tear strength
6.various color is available
7.Heat Resistance(up to 180 degrees)
8.High reproduction rate

 4.SHELF LIFE:
When stored at or below 32°C (89.6°F) in the original unopened containers, YJS-5 series Silicone Base and its Curing Agents have a usable life of 12 months.

 5.Package
Silicone base:1kg/drum; 20kg/drum;25kg/drum;200kg/drum.
Curing Agent: 30g/bottle; 1kg/bottle

 



  
 
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