high tear strength non oil out liquid silicone rubber condensation cure silicone rubber

Product Overview

Description

#RTV2 Mold Making Liquid Silicone Rubber For Plaster Ornaments Resin GRC Stone Crafts Molds 

The Liquid RTV2 Silicone mould making rubber for crafts is a kind of tin cure silicone rubber for mold making and silicone products. The silicone rubber will be cured under room temperature. It’s two-components liquid silicone rubber, the mixing ratio is 100:3. It has an exceptional fluidity and good operability. Especially, the tin cure silicone rubber has a lower shrinkage, higher temperature resistance.

 RTV2 Mold Making Liquid Silicone Rubber For Plaster Ornaments Resin GRC Stone Crafts Molds 
Outstanding release properties
Low viscosity
Easy mixing and degassing
High flowability
Odorless and Nontoxic
Enhanced durability
liquid rtv2 silicone rubber for artificial molds
3. Application of RTV2 Mold Making Liquid Silicone Rubber For Plaster Ornaments Resin GRC Stone Crafts Molds 

Artificial rock molds making

Gypsum moulds making
Stone mold
Plaster mold making

Resin mold

Concrete mold 

4. Datesheet of Good Price #RTV2 Silicone Liquid Rubber for Veneer Stone Molds 30 Shore A 

 

Model NO·	XB-730#	XB-725#	XB-630#	XB-625#
Mixing ratio  (by weight)	100:3	100:3	1:1	1:1
Appearance/Color	White	White	Translucent	Translucent
Hardness (Shore A)	30±2	25±2	30±2	25±2
Mixed viscosity (mPa·s)	20000±500	16000±500	4000±500	2000±500
Working time (at 23℃/75℉, MINS)	30~40	30~40	30~40	30~40
Curing time (at 23℃/75℉, HRS)	3~5	3~5	3~5	3~5
Tensile strength (Mpa)	≥4.0	≥4.2	≥5.8	≥5.5
Tear strength (KN/m)	≥29.5	≥28.5	≥24.5	≥26.5
Shrinkage (%)	<0.2	<0.2	<0.1	<0.1
Elongation at break (%)	≥420	≥550	≥450	≥520

 

5. Using instructions of #RTV2 Mold Making Liquid Silicone Rubber For Plaster Ornaments Resin GRC Stone Crafts 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 100:3 by weight, mix the silicone rubber and catalyst evenly.
liquid rtv2 silicone rubber for artificial molds
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.