Why does the mold appear oily?

The silicone itself does not emit oil. Oiliness is caused by adding composite silicone oil (a mix of silicone oil and white mineral oil) during operation. White mineral oil is a petrochemical product, not silicone oil.

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

This occurs if the original model is not ground or polished, transferring imperfections to the mold. Uneven application of release agents can also cause surface irregularities.

What are the common applications for mold silicone?

It is widely used in toy, gift, furniture decoration, character reproduction, building decoration, resin handicraft, candle craft, plastic toy, gypsum craft, glass industrial products, and sculpture industries for product replication and mold making.

Resin Pumpkin, Potion Bottles Silicon Molds Raw Material - RTV 2 Mold Making Liquid Tin Cure Rubber Silicone

Name: Resin Pumpkin, Potion Bottles Silicon Molds Raw Material - RTV 2 Mold Making Liquid Tin Cure Rubber Silicone
Brand: Dongguan gangtian polymer materials Co.Ltd.
SKU: 2012442385

Guangdong, ChinaDongguan gangtian polymer materials Co.Ltd.

US$6.08

50-499 kg

US$5.88

500-999 kg

US$5.38

1,000-49,999,999 kg

US$3.28

50,000,000+ kg

Sample price:US$6.00/kg.Request sample

Product profile

Customization

Available

Material

Silicone

Application

Mold Making

Model NO.

GTSIL-T10 ~ GTSIL-T40

Certification

RoHS

Component

Part a + Part B (Two Component)

Mixing Ratio

100:2, 100:3, 100:5

Customiation Service

Color, Package

Shrinkage - %

Around 0.2%

Free Samples

Yes

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

Customizable Color and Package: We offer customization services for color and packaging to meet specific needs.

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

High Replication Performance: Excellent fluidity and low shrinkage ensure fine detail duplication and easy de-molding.

Chemical and Heat Resistance: Resists heat, acid, alkali, and aging, making it suitable for various industrial applications.

Versatile Application: Ideal for art, industrial prototypes, sculptures, and casting materials like plaster and wax.

Multiple Viscosity Options: Available in various hardness and viscosity grades to suit different mold-making requirements.

Flexible Shipment Methods: Supports shipment by air, sea, or train to accommodate global logistics needs.

Free Samples Available: Free samples are provided to allow customers to test quality before placing orders.

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: ≤6.12h 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 is the silicone mold only reusable for a few times?

This is often due to adding too much silicone oil, which destroys molecular weight, or adding too much catalyst (more than 2% for condensation cure), which reduces tension and tear strength. Using high-hardness rubber for delicate small products or low-hardness for large simple products also causes issues.

Q:Why does the silicone mold get burnt out?

Burnout occurs when using unsaturated resin without demolding within 3 minutes, as the resin generates significant heat during curing. Our silicone rubber includes special materials to resist high temperatures and help avoid this problem.

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

Condensation silicone rubber solidifies by absorbing moisture from the air. To ensure shelf life, we dry out water in the rubber. Solution: Add 0.05% water and stir briefly at low speed when using.

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

Weak tear strength is caused by adding too much silicone oil, adding excessive catalyst (recommended no more than 5%, ideally 2%), or using the mold prematurely. We recommend waiting 24 hours after mold completion and using an outer mold for protection.

Q:Why does the mold silicone have poor tension?

Poor tension results from adding large amounts of silicone oil to reduce viscosity, making the rubber too soft. This leads to reduced tear strength, short service life, and fewer mold turnovers.