RTV Silicone for concrete molds

DESCRIPTION
        RTV Silicone for concrete molds is a perfect silicone product to make silicone concrete molds. It is featured with almost nil shrinkage and perfect fluidity; Without releasing any  by-product with low molecular weight, and it's cured fully from top to bottom, from the inside and outside  simultaneously, so it will be deeply-cured. The E-series addition cured silicone will not meet the problem of degradation or sticky molds because of the existence of by-product of small molecules under certain conditions, (such as closed, high temperature).it's very ideal material for mold making and casting, such as stone concrete molds, cement molds, statue molds, reproduction for crafts or toys and so on. The cured mold can be reused for hundreds of times, without transformation and distortion. Its durability is so strong that it sells very well in the global markets.  


APPLICATIONS
        Concrete molding silicone can be used in not only the field of common RTV 2 part moldmaking silicone. As the vulcanizing reactions of addition cure silicone is fundamentally different from tin cure silicone's, it has no problem of deep vulcanizing or reverse reaction, or other problem. Therefore, our addition cure silicone is particularly applicable for plaster silicone molds, cement product mold, other molds even with big size and so on. It features with lower viscosity, high strength , good fluidity, so it can also be very suitable for the replication for the models with precision and complex pattern. From the following information, you will get a full view of its performance.  



FEATURES
＊An exceptional fluidity and good operability, easy to demold

＊Good tensile and tear strength

＊Outstanding bubble releasing

＊Non-deformation

＊Low shirinkage

＊Aging resistance ,high temperature resistance (200℃) ＊Environmentally, food-grade  


OPERATION INSTRUCTIONS
Step 1: prepare the original molds Prepare an perfect original mold and clean it totally before operation .
＊Notes:Make sure your original molds and operation tool cleaned up totally to avoide uncure problem .

Step 2: Take 100 G part A and 100 G part B (Or 100 G part A and 10 G part B) and mix them evenly.
＊Notes: Addition cure mold making silicon rubber is two part flowing liquid , Pls follow the step strictly: 1.Weigh the two part exactly by electronic weight.. If any part not in exactly weight , it may cause changing of hardness , or even cause uncure problem. 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 . 3. We sugges to set the silicone mold for another 12 hours after demould before put into large production .  


WARM TIPS 
As addition cure silicone is a kind of platinum cure system ,which will be easy to cause uncure problem ,so Kindly follow the tips below :
＊Do not mix with liuqid condensation silicone rubber or even the tool which used for condensation silicone
＊Do not mix with organic matter which contains N, S, P organics and ionic compound like Sn, As,Hg, Ph,
＊Do not add any pigment or powder into the addition cure silicone rubber without any testing to prevent uncure problem  


PACKAGE 
20KG/drum vacuum packing for part A + 20KG/drum vacuum packing for part B
200KG/drum packing for part A +200KG/drum packing for part B  


SHELF LIFE
Twelve(12) months when stored under dry and cool place by original package under 25℃