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RTV-2 liquid silicone rubber for gypsum/plaster decoration mould making



4.6 ~ 5.6 / Kilogram ( Negotiable ) Get Latest Price


4.6 per Kilogram

200 Kilogram

1kg/drum, 5kg/drum, 10kg/drum, 20kg/drum, 25kg/drum, 200kg/drum


120 Ton per Month

Western Union, L/C, T/T

Product Specification


good tear and tensile strength

none oily,no smell,lowest shrinkage




free of charge

silicone mold making

top grade

more than 1000times


Product Description

GS-C25/C30  RTV-2 silicone rubber for middle size gypsum mold making  








1.Description of gypsum mold making silicone rubber


GS-C25/C30 Silicone rubber is tin cure silicone rubber for mold making. .The silicone rubber will be cured under room temperature, Its two-components, the mixing ratio is 100:2 . Part A is a flowable liquid silicone , part B is the catalyst. It has an exceptional fluidity and good operability. GS-C25/C30 has a moderate hardness , it is suitable to make the middle size molds .






2.Characteristics of gypsum mold making silicone rubber


*An exceptional fluidity and good operability, easy to demold

*Good tensile strength and tear strength

*soft hardness

*copy detailed pattern 

*good flexibility




*long shelf-time &lifetime






3.Application of gypsum mold making silicone rubber


GS-C25/C30 is suitable for making middle size gypsum molds , plaster casting mold , cement casting mold , concrete molds , statue molds , resin craft molds , stone molds , sculpture mold , polyurethane casting mould , etc .



4. Using instructions of gypsum mold making silicone rubber


Step 1: prepare and clean the prototype.

You must make sure your original molds perfect. fix the original mold on a board , then using some assistant material(like cardpaper) to make a frame for to surround the prototype. The frame is no need ,if we make the mold by brushing way .




Step 2: Take the silicone and catalyst as the ratio 100:2 (silicone:catalyst=100:2) ,mix the silicone rubber and catalyst evenly. 

*Notes: Molding silicon rubber is a kind of flowing liquid and it contains two parts. Part A is a kind of flowing liquid and part B is the curing agent. Remember to mix part A and part B evenly, otherwise the silicon rubber will be partly solidified and this will bring troubles for your final operation. Whats more, the finished molds will have a short life. All of these will cause a waste of silicon rubber.




Step 3: Vacuum pumping


After mixed the silicone evenly, it is better to release the bubble by Vacuum pumping.


Step 4: Pouring cast or brushing cast


After released the bubble, we can pour/brush the silicone rubber on the prototype 

*Notes:Please finished all the steped within the operation time .If not it will cause cross linking reaction, and no more further steps will be available.So,we have to pay attention to the pot life and curing time.




5. Package and shelf life of gypsum mold making silicone rubber






Shelf life and transportation

1. Twelve(12) months when stored at 25C in tightly closed original packages.

2. This kind of product is non-dangerous product, which could be transported as general chemicals.




Any questions, pls feel free to contact us , it will be our great pleasure at service for you:








Mobile: 0086-18565639690




Whatsapp: 0086-18565639690

Contact Us

Hongkong Great silicone technology co., ltd

Contact Person



Hongkong Great silicone technology co., ltd


Dongguan, Guangdong, China,




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