Dongguan Guochuang Organic Silicone Material Co., Ltd.

Characteristics of rtv 2 liquid silicone rubber for frame gypsum molds  * An exceptional fluidity and good operability, easy to demold * Good tensile strength and tear strength * Suitable hardness * Copy detailed pattern  * Good flexibility * Eco-friendly * Long shelf-time &lifetime  Datesheet of rtv 2 liquid silicone rubber for frame gypsum molds    Item   No. Hardness  (shore A°) Viscosity  (CPS) Tensile-strength ( kgf /cm2 ) Tear-strength  (kgf /cm2 ) Elongation-break(%) Mixing  ratio operation time       (25 ℃ ) Curing  time       ( 25 ℃) shrinkage C830 30±1 22000±1000 ≥42 ≥26 ≥420  100:3 20-30 mins 2~3 h ≤0.3%   5. Using instructions of rtv 2 liquid silicone rubber for frame gypsum molds   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 cardboard) 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: rtv silicone 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 silicone rubber will be partly solidified and this will bring troubles for your final operation. What's more, the finishes molds will have a short life. All of these will cause a waste of silicone 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 finishes all the steps 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. Packaging & Shipping 6. Package and shelf life of rtv 2 liquid silicone rubber for frame gypsum molds   Package 1kg/drum,5kgs/drum,20kgs/drum,25kgs/drum,200kgs/drum.   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. Contact Us Any inquiry, feel free to contact Ms. Rachel: Email:rachel(at)gcsilicone(dot)net skype:13929247235 Mobile/whats app:86-13929247235 Tel:86-0769-88020535 Website: www.gcsilicone.en.alibaba.com