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17 November 2016
Silicone News
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HY-220 RTV-2 Shoe Sole Mold Making Silicone Rubber


HY-220 is a kind of room temperature vulcanized silicone rubber in condensation type. It’s generally named as two part

silicone rubber , Part A is a flowable liquid, part B is the curing agent or catalyst . It’s mainly used for shoe sole mold making .



HY-220 silicone rubber is mainly used for shoe molds , sand casting , sole sampling , plaster models , simple products mold

making and so on .


Technical Parameters  

Model Color Mixing ratio (%) Pot life (mins,

under 25℃)

Curing time

(hrs,under 25℃ )

Hardness  ( Shore A ) Tensile-

strength  (MPa)


strength (kN/m)


(After A/B mixed ,mPa.s)


rate (%)



HY-220 White 2-3 30-40 4-5 20±2  









≤0.3%  230%



*An eceptional fluidity and good operability, easy to demold


*Low shrinkage

*Cure at room temperature

*Temperature resistance of 150-180 Centigrade



Operation instructions

Step 1: prepare the original molds

Make sure your original molds perfect. fix it on a board. And fix the original mold on a board , then used four piece of board

to enclose the original molds .


Step 2: Take 100 G parts A and add 3G parts B and mix them evenly.

*Notes: Mold making silicon rubber is a kind of flowing liquid ,it contains two parts. Part A is a kind of flowing white liquid

and part B is the curing agent or catalyst .Pls follow the step strictly:

         1.Weigh the two part exactly by electronic weight..

If not , for example add two much catalyst , the operation time will be too fast to operate ,which will cause inconvinience to

operate .

         2.Mix part A and part B evenly.

Otherwise the silicon rubber will be partly solidified and this will give birth to difficulties in your final operation. What’s more,

the finished molds will meet a short life. All of these will cause a waste of silicon rubber.

Step 3: Vacuum pumping

Without exception, this step takes less than 10 minutes. Otherwise, it will cause cross linking reaction, and no more further

steps will be available.


Step 4: Pouring casting or Brush operation

*Notes:1. For simple pattern products we suggest use pouring operation way , which will be very easy to operate and demould. Pourable silicone require light viscosity which will be easy to flow smoothly and easy to de-air .

2.For delicate pattern products we suggest use brushing operation way , which can copy the pattern exactly . Brushable silicone require high viscosity which won’t be easy to flow away and easy to brush .

  1. We sugges to set the silicone mold for another 12 hours after demould before put into large production .


25KG/drum vacuum packing for part A +1kg/ bottle catalyst for part B

200KG/drum packing for part A +1kg/ bottle catalyst for part B


Shelf life

  1. Twelve(12) months when stored underdry and cool place by original package under 25℃

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