(LSR) Liquid silicon rubber for relievo mould making

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It is due to the addition of the silicon oil. Normally we do not advise our customers to add any silicon oil into the silicon rubber. If it is necessary, the ratio must be 5%-10%.

3. Why isnt the silicon mold acid & alkali and aging resistant?

2. Why is the silicon mold oily?
The liquid  silicone rubber itself doesnt contain any oil, so it wont be oily. If the mold is oily, it may be because you add the compound silicone oil( the compound of silicon oil and white oil). The white oil is not silicon oil but a kind of petrochemicals.

1.Why is the tear strength of the silicon mould weak?
In order to reduce the viscosity of silicon rubber for mould making and pursue a good quality, you may add a lot of silicone oil into the silicon rubber when making mould. In fact, it might have just the opposite effect. The tension and the tear strength will be reduced badly with the addition of silicon oil. And the silicon mould will be in a weak and flimsy manner.

(LSR) Liquid silicon rubber for relievo mould making is flowing liquid with general hardness of 22-50 A

(LSR) Silicon rubber:
1)mainly for concret products mould making
2)good tensile and tear strength, high copy time