RTV silicone rubber for stone mold making

RTV silicone rubber for stone mold making  applications

RTV silicone rubber for stone molding is primarily intended for poly resin crafts, PU crafts, PU resin crafts ,gypsum crafts ,unsaturated resin crafts, lighting and candles crafts ,plastic toy , stationery gifts crafts industry, a large statue Buddha, furniture, furniture decorative materials, statues Buddha, artifacts copied, building decoration materials, largescale cement mold, artificial fossils Factory, Europe component factory, 

simulation landscapes, animals and plants sculpture, sandstone crafts and so on.

RTV silicone rubber for stone mold making description

RTV silicone rubber for stone mold making is white or red flowing liquid with general hardness of 22-50 shore A after curing. tin cured silicone rubber is a kind elastic silicon rubber mold which features with resistance to deformation, high-temperature, acid-alkali and expansion as well as high reproduction times, good tensile strength, tear strength and elongation.

FAQ. Why the RTV silicone rubber for stone mold making just can be reproduced for a few times?

It can be due to the following reasons: 

a. Adding too much silicone oil in to silicon rubber. Silicon oil is an additive which destroies the molecular weight of silicone rubber and reduce the tension and tear strength.

b. Using the silicon rubber with a high hardness to make molds for small sized products with delicate and intricate designs and the silicon rubber with a low hardness to makes molds for large sized products with simple designs. 

(Notes: we should choose the silicon rubber specifically according to the requirements of our products to avoid this problem.)

Datesheet of RTV silicone rubber for stone mold making

Operation of  RTV silicone rubber for stone mold making

1. deal with original moulds

2. brush on release agent

3. correct weigh accoring to mixng ratio

4. stir the two component evenly

5. vacuum-pumping

6. pouring

 RTV silicone rubber Manufacturing instruction:

Add curing agent of 2%-3% at the room temperature, the RTV silicone rubber is still operational within 30 minutes, and in 2-3 hours.

1. Adding curing agent 1%, the  RTV silicone rubber for stone mold making can still be operated within 2. 5 hours and can be demoulded after 6-8 hours.

2. Adding curing agent 2%, the  RTV silicone rubber for stone mold making  can still be operated within 50 minutes to 1 hour and can be demoulded after 2-3 hours.

3. Adding curing agent 3%, the  RTV silicone rubber for stone mold making can still be operated within 30 minutes and can be demoulded after 1. 5-2 hours.

4. Adding curing agent 4%, the  RTV silicone rubber for stone mold making can still be operated within 15 minutes and can be demoulded after 1-1. 5 hours.