Liquid RTV Silicone Rubber for Mold Making Plaster/Cement/Concrete Molds

Product Description

item	liquid rtv silicone rubber for mold making plaster/cement/concrete molds
Place of Origin	China
	Guangdong
Brand Name	Gangtian
Model Number	GTSIL-T35
Application	mold making
Component	Part A + Part B (two component)
Mixing ratio	100:2, 100:3, 100:5
color	Part A: an odourless white liquid colloid; Part B: an aqueous liquid in transparant color
customiation service	Color, package
Hardness Shore A	34-36 shore A
Viscosity - Cps	33000-38000
Shrinkage - %	around 0.2%
Free Samples	yes
Certification	ROHS, REACH, MSDS, Safe transport of goods by Sea/Air, etc
Tear Strength - KN/m2	25-28
Tensile Strength - Mpa	5-7
Elongation - %	350-500%

Feature & Advantage

1. Low viscosity for easy mixing,great for making simple one- or two-piece block molds.
2. Perfect for art and industrial applications,often used for molds to reproduce sculptures and other prototypes, casting plaster, resins, and wax. 3. Very good fluidity for easy pouring operation.
4. Stable quality & non-oily.
5. Good tension for easy de-molding.
6. Good duplication with fine details.
7. High performance in replication.
8. Excellent resistance against heat, acid & alkali and aging.
9. Low shrinkage (less than 0.1%).
10. Long Shelf-life up to 18months.

Packing & Delivery


Regular package: 1kg/drum, 5kg/drum, 20kg/drum, 25kg/drum, 200kg/drum

Customization package is available.

 

Shipment:

* Samples: 1-3 days with upon receipt of your payment
* Mass production order: normally 3-7 days after having your payment.
* For more detailed information, kindly ask me, thanks~!

 

Related product
 

Model Code	GTSIL-T10	GTSIL-T15	GTSIL-T20	GTSIL-T25	GTSIL-T30	GTSIL-T35	GTSIL-T40
Hardness-Shore A	8-10	14-16	19-21	24-26	28-32	34-36	38-40
Viscocity-Cps	10000-14000	12000-16000	14000-18000	16000-20000	26000-32000	33000-38000	10000-14000
Mixing Ratio - %	100:2, 100:3, 100:5	100:2, 100:3, 100:5	100:2, 100:3, 100:5	100:2, 100:3, 100:5	100:2, 100:3, 100:5	100:2, 100:3, 100:5	100:2, 100:3, 100:5
Tear strength - Kn/m2	10-15	15-18	19-23	23-27	25-30	25-28	16-20
Tensile strength - Mpa	3.5-5.5	3.5-5.5	4-6	4-6	5-7	5-7	3.5-5.5
Shrinkage - %	0.3%	0.3%	0.3%	0.3%	0.3%	0.3%	0.3%
Elongation - %	400-500%	400-500%	400-500%	400-500%	350-500%	350-500%	350-500%

Below also some models of Platinum silicone you may interest:

Model Code	GTSIL-P0	GTSIL-P5	GTSIL-P10	GTSIL-P15	GTSIL-P20
Hardness-Shore A	0	4-6	8-10	14-16	19-21
Viscocity-Cps	1500-3000	2000-4000	3000-5000	4000-6000	4000-7000
Mixing Ratio - %	1:1	1:1	1:1	1:1	1:1
Tear strength - Kn/m2	10-15	12-16	14-17	16-18	18-22
Tensile strength - Mpa	3-5	3-5	3.5-5.5	4-6	4-6
Shrinkage - %	0.1%	0.1%	0.1%	0.1%	0.1%
Elongation - %	400-500%	500-600%	500-600%	500-600%	500-600%

Model Code	GTSIL-P25	GTSIL-P30	GTSIL-P35	GTSIL-P40	GTSIL-P45
Hardness-Shore A	24-26	28-30	34-36	38-42	43-46
Viscocity-Cps	5000-8000	6000-9000	6000-9000	4000-6000	3000-5000
Mixing Ratio - %	1:1	1:1	1:1	1:1	1:1
Tear strength - Kn/m2	22-26	20-23	16-19	12-16	10-15
Tensile strength - Mpa	4-6	4-6	4-6	3.5-5.5	3-5
Shrinkage - %	0.1%	0.1%	0.1%	0.1%	0.1%
Elongation - %	400-500%	400-500%	350-500%	300-450%	300-450%

 

Application

Certification

Company Profile

Gangtian produces liquid slicone rubber for mold making around 20 years.
1. Owning 5 factories located in Dongguan and Hunan (Sanpin, Sanqi, Huacan, Dongguang Gangtian, Hunan Gangtian)
2. Factory size above 50000 square meters in total ( In Hunan, we have an industrial park, around 25000 M2 )
3. Certificates: FDA, MSDS, REACH, ROHS, Cargo safe transportation by Sea/Air.
4. 600 tons per month capacity for liquid silicone + 6000 tons per month for HTV silicone, can enlarge anytime.
 

Welcome to visit our factory~!


Common Question and Our warm advice and solutions.

******Why could the silicone mold be reused only for a few times?
Maybe you will confuse about this question for years. Here we share you some following reasons:
*  Adding too much silicone oil into silicone rubber. Silicone oil is an additive which will destroy the molecular weight of silicone rubber and reduce the tension and tear strength.
*  Adding too much catalyst into the silicone rubber when you make the molds. For the condensation cure(tin catalyst) silicone rubber. we s est you add no more than 2% of catalyst. If you 1add too much catalyst, the operation time will be too fast to operate ,which will also reduce the tension and tear strength.
*  Using the silicon rubber with a high hardness to make molds for small sized products with delicate and intricate designs and the silicon rubber with a low hardness to makes molds for large sized products with simple designs.

******Why does the silicone mold get burnt out?
The silicone mold get burnt out because you have left out the important notes when using unsaturated resin materials to produce your products. The unsaturated resin produces great heat when added the curing agent. So you must demould the product within 3 minutes to avoid this problem.
Our silicone rubber has add a special material which can resistant high temperature to make the resin molds. Help our customer avoid this problem. 

******Why does the silicone mould appear to be dry outside but wet inside? 
Because molding silicone rubber is a kind of condensation silicone rubber, which get solidified after absorbing moisture from the air. In order to provide a significant shelf-life for the silicon rubber, we will dry out the water in the silicon rubber.
Solution: Add 0.05% water into the silicon rubber and Stir over a low speed briefly when you use it.

******Why is the tear strength of silicone molds weak?

There are three reasons:
1)  In order to reduce the viscosity of silicone rubber and pursue good quality, a large amount of silicone oil can be added to the silicone rubber when making the mold. In fact, it may have the opposite effect. The addition of silicone oil can severely reduce tension and tear strength. And the silicon mold will be in a fragile and fragile state.
2)  too much catalyst may be added to the silicone rubber, we recommend that customers add catalyst no more than 5%, 2% is fine.
3)  After the silicone mold is finished, you may use it prematurely. We recommend that customers start using the mold after 24 hours. More importantly, it would be better if you could make an outer mold to protect the silicone mold.

******Why does the mold silicone have poor tension?
In the process of making the mold, in order to reduce the viscosity of the silicone rubber and make the silicone rubber easy to operate, a large amount of silicone oil is added to the silicone rubber, which will make the silicone rubber very soft, resulting in poor tensile strength and reduced tear strength. The phenomenon of poor tensile force, resulting in the phenomenon that the mold is not durable, the service life is short, and the number of mold overturns is small.

******Why does the mold appear oily?
The mold silicone itself will not emit oil. The oil is caused by the addition of composite silicone oil (complex of silicone oil and white mineral oil) during the operation, because white mineral oil is a petrochemical product, not silicone oil.

******Why does the  silicone mold have traces, streaks, and unevenness on the surface?
This phenomenon occurs because the product or model to be reproduced has not been ground or polished. Because the actual model or product itself is not smooth or perfect enough, if the product or model to be copied has not been ground or polished, even the best silicone mold will be unsightly and not smooth enough. Another situation is that when the release agent is applied, the mold will not be smooth if it is not evenly brushed.

******What else wonderful usages of mold silicone do you know?
Mold silicone rubber is mainly used in toy and gift industry, craft gift industry, furniture decoration industry, character reproduction, building decoration and decoration industry, resin handicraft industry, unsaturated resin handicraft industry, candle craft, plastic toy industry, gift stationery industry, gypsum Craft gift industry, mold manufacturing industry, glass industrial products, simulation animal and plant sculpture, Buddha carving crafts and other industries product replication and mold making.