Why does the mold appear oily?

The silicone itself does not emit oil. The oil is caused by the addition of composite silicone oil (silicone oil mixed with white mineral oil) during operation.

Why does the silicone mold have traces, streaks, and unevenness on the surface?

This occurs if the original model is not smooth or polished, or if the release agent was not applied evenly. The mold will replicate any imperfections of the original model.

What are the wonderful usages of mold silicone?

It is widely used in toy, gift, furniture, character reproduction, building decoration, resin crafts, candle making, plastic toys, and various other industries for product replication and mold making.

Flowability 1A: 1b Liquid Molding Rubber Platinum Silicone for Making Resin Plaster Plastic Silicone Molds

Name: Flowability 1A: 1b Liquid Molding Rubber Platinum Silicone for Making Resin Plaster Plastic Silicone Molds
Brand: Dongguan gangtian polymer materials Co.Ltd.
SKU: 2012393435

Guangdong, ChinaDongguan gangtian polymer materials Co.Ltd.

US$7.88

1-199 Pieces

US$7.58

200-99,999,999 Pieces

US$3.88

100,000,000+ Pieces

Sample price:US$7.68/kg.Request sample

Product profile

Customization

Available

Material

Silicone

Application

Household, Medical, Industrial, Agricultural, Mold Making

Model NO.

GTSIL-P15

Certification

ISO, FDA, REACH, RoHS

Component

Part a + Part B (Two Component)

Mixing Ratio

1:1, 10:1, 9:1

Customiation Service

Color, Package

Hardness Shore a

14-16 Shore a

Viscosity - Cps

4000-6000

Shrinkage - %

Below 0.1%

Free Samples

Yes

Tear Strength - Kn/M2

16-18

Tensile Strength - MPa

4-6

Elongation - %

500-600%

Shipment

by Air, by Sea, by Train

Transport Package

1kg/Drum, 5kg/Drum, 20kg / Drum 25kg/Drum

Specification

liquid silicone rubber

Trademark

Gangtian

Origin

Dongguan, Guangdong

HS Code

3910000000

Production Capacity

600 Tons Per Month

Key features

Low Shrinkage Rate: Shrinkage is below 0.1% ensuring high precision in mold replication.

Excellent Fluidity: Low viscosity allows for easy mixing and pouring into intricate details.

High Tear Strength: Tear strength ranges from 16-18 KN/m2 for durable mold usage.

Long Shelf Life: Product maintains quality for up to 18 months when stored properly.

Multi-Industry Application: Suitable for household, medical, industrial, agricultural, and mold making uses.

Customizable Color: Color customization service is available for specific requirements.

Multiple Certifications: Certified by ISO, FDA, REACH, and RoHS for safety and compliance.

Fast Sample Delivery: Samples can be shipped within 1-3 days after payment receipt.

Company profile

Dongguan gangtian polymer materials Co.Ltd.

Guangdong, China

CertifiedBusiness Type: Manufacturer/Factory CertifiedR&D Capacity: ODM Service Available & OEM Service AvailableExport Year: 2016-08-08 CertifiedNearest Port: Guangzhou Port, Shenzhen PortAverage Response Time: ≤6.88h CertifiedTerms of Payment: LC, T/T, PayPal, etc.

AI-Powered supplier vetting

SummaryDongguan Gangtian Polymer Materials Co., Ltd. is identified as a China-based manufacturer of silicone and polymer materials, established in 2011, with 59 employees and a 6,000 m² manufacturing plant. Its product portfolio includes RTV 2 silicone rubber, LSR, silicone oil, silicone ink, pigments, and electronic potting compounds. The supplier reports more than 10 production lines and annual capacities totaling 6,900 tons across listed products, as well as exports since 2016 with 21%–30% of sales from exports. It holds an ISO 9001:2015 certificate and reports six R&D engineers and six to ten quality-control staff. The information supports strengths in certification, product breadth, production scale, and international market experience. However, the provided evidence does not sufficiently establish financial credibility, customization capability, or specific customer cases. After-sales capability is indicated by a stated focus on after-service but is not documented in operational detail.

Supplier typeThe supplier is explicitly identified as a manufacturer and as a professional manufacturer of RTV 2 liquid silicone rubbers. Its company type is also described as a limited company, with operations in Dongguan, Guangdong, China.

CertificationsThe supplier holds an ISO 9001:2015 certificate for supplier management systems. This is explicit evidence of a formal quality-management certification.

R&D capabilityThe supplier describes an R&D focus on innovation, reports six R&D engineers, and states that it has developed performance-enhancing silicone solutions. These statements support an established R&D function, although no patents, laboratories, or quantified R&D results are provided.

Production capacityThe supplier reports more than 10 production lines, a 6,000 m² manufacturing plant, and product capacities of 2,500 tons each for tin and platinum silicone rubber, 1,000 tons for silicone oil, 800 tons for electronic potting compound, and 100 tons for pigment. It also states production capacity above 500 tons per month, indicating substantial manufacturing capability.

Product Q&A

Q:Why can the silicone mold be reused only for a few times?

Common reasons include adding too much silicone oil which destroys molecular weight, adding too much catalyst (more than 2% for condensation cure), or using the wrong hardness for the product size and design.

Q:Why does the silicone mold get burnt out?

This happens when using unsaturated resin materials which generate great heat. You must demould the product within 3 minutes to avoid burning, as our rubber is designed to resist high temperatures.

Q:Why does the silicone mould appear to be dry outside but wet inside?

This is due to the condensation curing process absorbing moisture from the air. To fix this, add 0.05% water into the silicone rubber and stir briefly at low speed before use.

Q:Why is the tear strength of silicone molds weak?

Weak tear strength is caused by adding too much silicone oil, adding too much catalyst (recommended max 5%, ideally 2%), or using the mold prematurely before the recommended 24-hour curing time.

Q:Why does the mold silicone have poor tension?

Poor tension results from adding large amounts of silicone oil to reduce viscosity, which makes the rubber too soft and reduces its durability and service life.