Liquid Silicone Rubber for Shoe Insole and Footwear Mold Making - Low Hardness High Tear Strength

Product Description

Product Description

Our Liquid Silicone Rubber is a two component addition cure silicone specifically formulated for manufacturing shoe insoles, footwear molds, and insole production. This low durometer silicone is designed for liquid injection molding (LIM) to produce elastomeric parts where softness and cushioning are key requirements.

For shoe insole applications, low hardness silicone (Shore A 5-20) provides excellent cushioning, non-tackiness, and sensory characteristics that make it ideal for foot comfort products including heel inserts, corn pads, and full shoe insoles.

This addition cure silicone rubber offers a convenient 1:1 mix ratio and releases easily from molds. Cure time is rapid at 150-204°C (10-40 seconds) for injection molding applications, or room temperature curing (4-6 hours) for casting processes

Key Features

Optimized for Footwear and Insole Applications - Low durometer formulation provides superior cushioning and comfort for shoe insoles. Non-tacky surface ensures sensory comfort against skin.

High Tear Strength - Tear strength ensures molds withstand repeated demolding cycles without tearing, extending mold life.

Low Shrinkage - Ultra low shrinkage of 0.1 percent ensures dimensional accuracy and consistent insole sizes.

Excellent Detail Reproduction - Low viscosity captures fine patterns including arch support shapes and massage dot textures.

Fast Curing - Rapid molding cycle times of 20-60 seconds at 150-204°C for high volume production. Room temperature curing option available.

Easy Demolding - Inherent non stick surface allows finished parts to release cleanly without heavy release agents.

Adjustable Hardness - Shore A hardness from 5 to 20 customizable to meet specific comfort requirements

Technical Datasheet

 

Property	Value	Test Method
Appearance	Translucent / Clear	Visual
Hardness Shore A	5 to 20 Customizable	ASTM D2240
Mix Ratio A B by weight	1 to 1	—
Mixed Viscosity	8000 to 10000 cps	ASTM D1824
Pot Life at 25 Degrees Celsius	30 to 40 minutes	—
Demold Time at 25 Degrees Celsius	4 to 6 hours	—
Heat Curing Time	10 to 40 seconds at 150 to 204 Degrees Celsius	—
Tear Strength	20 kN m	ASTM D624
Tensile Strength	2.5 to 3.0 MPa	ASTM D412
Elongation at Break	500 percent	ASTM D412
Linear Shrinkage	0.1 percent	—
Operating Temperature	60 to 250 Degrees Celsius	—
RoHS REACH	Compliant	—

 

Applications

• Shoe Insoles and Footbed Inserts

• Heel Inserts and Heel Cups

• Corn Pads and Foot Cushions

• Orthopedic Insoles and Foot Support

• Vibration Damping Footwear Components

• Sport Insoles and Athletic Footwear

• Shoe Soles and Outsoles

• Custom Footwear Prototyping

• Medical Footwear Components

• General Footwear Molds

ADDITIONAL INFORMATION
Reproduction of Vertical Surfaces
If a skin mold is required of a vertical object or surface and cannot be made by normal pouring techniques, the catalyzed mixture can be made non flowable by the addition of thixotropic agent.

1. Prepare the original as described earlier.
2. Brush the original with a thin layer of catalyzed mixture. Repeat the operation when the first layer has started to cure, to achieve a coating thickness of >2mm. Leave to cure at
room temperature until the material is tacky.
3. Prepare a new catalyzed mixture of silicone and add 1% by weight of thixotropic additive and mix thoroughly until a paste consistency is reached. De-airing of the mixture is not
required.
4. Using a spatula, cover the coated original with the thixotropic coating until all undercuts are filled; leave to cure for 24 hours at room temperature.
5. Construct a support mold using polyester resin or plaster and allow to set in contact with the silicone coating. Carefully remove the support mold. Peel the rubber off the original
and place in the support mold.

Use at High Temperatures
Some molds produced from condensation cure silicone rubbers can degrade when exposed to temperatures above 150°C (302°F) over a period of time or when totally confined in
storage at high ambient temperatures. This can result in softening and loss of elastic properties.
Resistance to Casting Materials
The chemical resistance of fully cured silicone rubber is excellent, and similar to all condensation cure silicone elastomers. It should be noted however that ultimately, resins and
other aggressive casting materials will attack silicone molds, changing physical properties, surface release and possibly mold dimensions. Molds should be checked periodically during
long production runs.
 

Company Information

Dongguan Gangtian Polymer Materials Co.,Ltd, located in Dongguan City, Guangdong Province, China, is a professional leading manufacturer of RTV 2 Liquid Silicone Rubbers. Focusing our Research and Development on innovation, we have been providing performance enhancing solutions to serve the diverse needs of thousands of customers worldwide since the year of 2003. Our main products include RTV 2 mold making series, tinsil and platsil, RTV 2 platsil for products, injection LSR, silicone potting compound, silicone oil, silicone ink, etc. With penetrating Professionalism in technology solutions and Honesty in after service, we GT Polymer Materials Co., Ltd are not only a trustworthy partner but also a good friend to the customers worldwide.Brand Story - Gangtian, founded in 2003 in Dongguan, by Yuanfu Deng, a Chinese chemist and engineer in the field of polymer materials, is a silicone factory brand. "Gang", or port, is a new place near sea for him to cultivate. "Tian", or field, stands for his hometown, a very small village in Hengyang, Hunan Province. Influenced by his parents who were both farmers, he creatively combines the company culture with Eastern wisdom, to work on the vision of "Making a better life with magic silicone rubber". With his efforts and achievements in R & D of silicone rubbers, we have been serving hundreds of domestic and overseas customers with quality materials for more than 15yrs. And now our production capacity reaches to more than 500tons per month. We uphold the core values of "create value for partners" and create value for e-commerce and information service industry through independent innovation and sincere co-op with "honesty, tolerance, innovation and service" as the spirit of enterprise. We always warmly welcome you to join us. Let's go and explore this magic world of silicones!

Packaging & Shipping

Packing
1kg/plastic can,  5kg/plastic drum , 20kg/metal drum,  25kg/ plastic drum, 25kg/ metal drum, 200kg/metal drum,
Customized service on package is available.
 

 

 

Shipping
Normal delivery time is within 3-5days with confirmation on payment in our bank.
Please confirm with us if you need an urgent order.

• Shipments by sea, by air, by train, or by truck is available.
• Normal delivery time is within 3-5days with confirmation on payment in our bank.
• Please confirm with us if you need an urgent order.

Shelf life
Twelve (12) months from date of shipment when stored at 25ºC in the original sealed packages.