Why does the mold appear oily?

The oil comes from composite silicone oil (silicone oil mixed with white mineral oil) added during operation, not from the silicone rubber itself.

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

This occurs if the original model is not polished or if the release agent is not applied evenly. The mold replicates the surface condition of the model.

What are the wonderful usages of mold silicone?

Used in toy, gift, furniture, character reproduction, building decoration, resin crafts, candle making, plastic toys, gypsum crafts, glass products, and sculpture industries.

Cement

Name: Two Part Platinum Cured Mould Making Liquid Silicone Rubber for Casting Stones/Plaster/Concrete/Cement
Brand: Dongguan gangtian polymer materials Co.Ltd.
SKU: 2003108122

Guangdong, ChinaDongguan gangtian polymer materials Co.Ltd.

US$7.68

1-199 kg

US$7.08

200-9,999,999 kg

US$2.88

10,000,000+ kg

Sample price:US$1.00/kg.Request sample

Product profile

Customization

Available

Material

Silicone

Application

Household, Medical, Industrial, Agricultural, Mold Making

Model NO.

GTSIL-P10 ~ GTSIL-P40

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

24-26 Shore a

Viscosity - Cps

5000-8000

Shrinkage - %

Below 0.1%

Free Samples

Yes

Tear Strength - Kn/M2

22-26

Tensile Strength - MPa

4-6

Elongation - %

400-500%

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.

High Tear Strength: Tear strength ranges from 22 to 26 Kn/M2 for durable mold performance.

Excellent Fluidity: Viscosity between 5000-8000 Cps allows for easy pouring and filling.

Wide Hardness Range: Available hardness from 00 to 60 Shore A to suit various applications.

Long Shelf Life: Product maintains stability with a shelf life of up to 18 months.

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

Customizable Color: Color customization service is available to meet specific requirements.

Comprehensive Certifications: Certified by ISO, FDA, REACH, and RoHS for safety and quality assurance.

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: ≤5.74h 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?

Reasons include adding too much silicone oil which destroys molecular weight, adding too much catalyst (over 2% for tin cure) which reduces tension, or using wrong hardness for the product design.

Q:Why does the silicone mold get burnt out?

This happens when using unsaturated resin without demoulding within 3 minutes, as the curing agent generates great heat. Our rubber includes special materials to resist high temperatures.

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

This is due to condensation silicone rubber absorbing moisture from air. Solution: Add 0.05% water and stir briefly at low speed before use.

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

Caused by adding too much silicone oil, adding too much catalyst (over 5%), or using the mold prematurely before 24 hours. Using an outer mold for protection is recommended.

Q:Why does the mold silicone have poor tension?

Excessive silicone oil added to reduce viscosity makes the rubber too soft, resulting in poor tensile strength, short service life, and fewer mold turnovers.