RTV2 Liquid Silicone Rubber for Stamping Concrete Molds Making

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$6.03 - $9.75 / Kilograms | 50 Kilogram/Kilograms (Min. Order)
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Quick Details
Place of Origin:
Guangdong, China (Mainland)
Brand Name:
Sibetter Silicone
Model Number:
Mixing ratio:
25 shore A
for stamping concrete mold making
Flowing liquid colorful silicone rubber
customer sized
Original of raw materials:
imported raw materials
food grade
HS code:
Supply Ability
Supply Ability:
3 Tonne/Tonnes per Day
Packaging & Delivery
Packaging Details
20kg/ pail, 40kg/kit
Guangzhou, Shenzhen, Hongkong






RTV2 Liquid Silicone Rubber for Stamping Concrete Molds Making




Product Description

 1. Description of RTV2 Liquid Silicone Rubber for Stamping Concrete Molds Making

XB-625# addition cure molding silicone rubber safe silicone food grade silicone medical grade silicone silicone for chocolate molding is kind of addition cure high temperature resistance organic molding,it is liquid with moderate viscosity and can be poured and brushed,the mold made out of the silicone and curing agent,which with high temperature up to 250-300 degree celsius,has dimension stability,low linear shrinkage,it is a two component material with mixing ration of 1:1.

2. Characteristics of RTV2 Liquid Silicone Rubber for Stamping Concrete Molds Making
Acceptable for food contact
Outstanding release properties
Low viscosity
Easy mixing and degassing
High flowability
Odorless and Nontoxic
Enhanced durability


3. Application of RTV2 Liquid Silicone Rubber for Stamping Concrete Molds Making

concrete/cement/stone moldmaking silicone

Sculpture moulds making
Cake mold
Chocolate moldmaking
Candy moldmaking
Baking moldmaking
Ice trays molding
Casting butters
Casting for Kitchen products


4. Datesheet of RTV2 Liquid Silicone Rubber for Stamping Concrete Molds Making


Model NO·XB-625#XB-640#
Mixing Ratio (by weight)1:11:1
Hardness (Shore A)25±240±2
Mixed viscosity(mPa·s) 2000±5006000±500
Working Time(at 23℃/75℉, MINS)30~4030~40
Curing Time(at 23℃/75℉, HRS)3~53~5
Tensile strength, Mpa≥5.5≥5.4
Tear strength, KN/m≥26.5≥19.5
Shrinkage, % <0.1<0.1
Elongation at break,%≥520≥380

5. Using instructions of RTV2 Liquid Silicone Rubber for Stamping Concrete Molds Making

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 1:1 by weight, 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.



1.Why does the silicone mold appear to dry outside but wet inside?
Some molding silicone rubber is a kind of condensation cure silicone rubber, which would get solidified after absorbing moisture.

While in order to provide a significant shelf-life for the silicon rubber, we will dry out the water in the silicon rubber.

So when the humidness is lower than 50%, this would happen.

Solution: Add 0.1% water into the silicon rubber and Stir over a low speed briefly when you use it.


2.Why the silicone mould cured incompletely?

a. Inexact mixing ratio, didn’ t weigh the part A and hardner according to the standard ;

b. The silicone and catalyst have not been mixed evenly and totally.

We should pay attention to avoid this kind of problem, otherwise there will be a waste of silicone mold.


R & D Capabilities

We have own lab with the experienced&professional R&D and production team as well as advanced devices. Here show only parts of the whole testing.




Our Services


1.Pre-sale services:
Sibetter can act as a good adviser and assistant of you; enable you to get rich and generous returns on your production. We would collect all the detailed information and offer the most suitable items for your needs and prepare the high-quality goods for you.
2. After-sale services:
Provide considerate services to minimize your worries.
(1) you would get the specific using instruction if you don’t know how to make the mould or products
(2) If you met any problem, reply would be got in 24 hours
(3) You are welcome any time to discuss the usage, the market, the raw materiasl with us about silicone rubber
(4) If you were distributor, applications and the way to get the customers would be sent 

Packaging & Shipping


Gernerally, Sibetter Silicone provide the silicone rubber with 20kg/25kg per pail. 





If you need any further information about the liquid silicone rubber, pls feel free to contact Joanna:


Web: www.sibetter.com

SKype: joanna901101

Whatsapp/ Wechat: +86-13527947568

Tel: +86-0769-23077653

Fax: +86-0769-23077651

E-mail: joannawu(at)sibetter(dot)com

Facebook: joanna901101(at)gmail(dot)com