YJS-645 hard liquid silicone rubber for stamped concrete
Category: Concrete Casting silicone  Publish Time: 2018-08-07 10:34 
YJS-645 is a two-component 1:1 Mix addition (platinum) cured RTV silicone rubber which cures at room temperature. YJS-645 is is hard and not very flexible, with a 45A Shore hardness.
1. Description
YJS-645 is a two-component 1:1 Mix addition (platinum) cured RTV silicone rubber which cures at room temperature. YJS-645 is is hard and not very flexible, with a 45A Shore hardness. It is firm enough to hold heavy concrete parts yet still has flexibility for demold. A good option for making molds for rapid prototyping, wax casting (foundries and candle makers), architectural restoration and for casting concrete. It can also used as casting materials.

2.Features of YJS-645 platinum cure silicone
-High chemical resistance to the aggressive components of some types of resin
-High resistance to laceration (this characteristic guarantees high resistance to wear and tear)
-High level of accuracy in reproducing very small particulars
-High dimensional stability over time and non-deformability
-Considerable resistance to high temperatures and to ageing
-Excellent non-stick effect
-high tear resistance,
-Will not shrink in service

3. Technical datasheet
Typical general characteristics
Inspection Method
Value
Product data (Catalyzed A+B)
YJS-645
Hardness
Shore A
45±2
Mix Ratio
A:B
1:1/10:1
Color
/
translucent
Pot life
25 °C (77F)
30-40
Curing time
25 °C (77F)
3-4
Mixed viscosity
mPa.s
11000±1000
Tear-strength
kg/cm
10±2
Tensile-strength
M.pa
5.5±1.0
Elongation
%
400±50
Shrinkage
%
0.1

4. Using instructions
1. Place a plastic container on a small scale, making sure to zero out the weight on the scale. Note: use a container that, during rise under vacuum in Step 5, will allow for material to expand to 4-5 times its resting volume.
2. Pour catalyst into the plastic container, noting weight of material poured.
3. In the same container, pour an equal weight of base on top of the catalyst (e.g., 100 grams of catalyst and 100 grams base). Note: within a 5% weight variance, the end result is not altered.
4. With a clean, dry mixing spatula, mix energetically until the color of the product is homogeneous. Note: working time begins at this step. Mixing should take no longer than 1-2 minutes.
5. Place container under vacuum and vacuum until material bubbles and rises. Release vacuum and repeat until bubbles are removed. Vacuuming should take no longer than 3-4 minutes.
6. From a height of approximately 30 cm, pour the mixed silicone into the mold frame. Maintain the pouring stream in the same spot so as to minimize introduction of air bubbles into the mold.
7. Allow the mold to sit, undisturbed, for at least 4 hours to ensure the silicone is fully cured.
8. Remove the mold from the frame.
9. Cut around the pattern carefully to release it from the silicone rubber mold.

5.Appearance
Part A: a non-toxic and odorless liquid with translucent color and platinum inside.
Part B: a non-toxic and odorless liquid with translucent color.
ATT: We can do any curing time as your requirements.

6.SHELF LIFE:
When stored at or below 32°C (89.6°F) in the original unopened containers, YJS-6 series Silicone have a usable life of 12 months.

7.Package
1kg/drum; 5kg/drum;10kg/drum; 20kg/drum;25kg/drum;200kg/drum. 


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