Why does the mold appear oily?

The silicone itself does not emit oil. Oiliness is caused by adding composite silicone oil (silicone oil mixed with white mineral oil) during operation, as white mineral oil is a petrochemical product.

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

This happens if the original product or model was not ground or polished, or if the release agent was not applied evenly. The mold replicates the imperfections of the original model.

What are the wonderful usages of mold silicone?

It is used in toy, gift, furniture, character reproduction, building decoration, resin handicrafts, candle crafts, plastic toys, stationery, gypsum crafts, glass products, and sculpture industries.

Condensation Mold Making Silicone RTV2 Liquid Rubber Silicone for Making Crystal Silicone Mold

Name: Condensation Mold Making Silicone RTV2 Liquid Rubber Silicone for Making Crystal Silicone Mold
Brand: Dongguan gangtian polymer materials Co.Ltd.
SKU: 2008078395

Guangdong, ChinaDongguan gangtian polymer materials Co.Ltd.

US$3.88-6.08

50 kg

Sample price:US$2.00/kg.Request sample

Product profile

Customization

Available

Raw Material

Silicone Rubber

Material

Silicone Rubber

Model NO.

GTSIL-T10 ~ GTSIL-T40

Appearance

Liquid

Form

White Liquid Colloid + Transparent Liquid

Component

Part a + Part B (Two Component)

Application

Mold Making

Mixing Ratio

100:2, 100:3, 100:5

Customiation Service

Color, Package

Shrinkage - %

Around 0.2%

Free Samples

Yes

Certification

RoHS, Reach, MSDS, Safe Transport of Goods by Sea/

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 less than 0.1% ensuring high precision in mold replication.

Excellent Fluidity: Low viscosity allows for easy mixing and pouring into complex molds.

High Tear Strength: Superior tear strength ensures durability and prevents mold damage during demolding.

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

Customizable Color: Color customization service is available to meet specific branding needs.

Heat and Chemical Resistance: Resistant against heat, acid, alkali, and aging for long-term performance.

Fine Detail Replication: Perfect for reproducing sculptures and prototypes with intricate details.

Multiple Hardness Options: Available in Shore A hardness ranging from 8 to 46 for various applications.

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: ≤6.13h 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 excessive catalyst (more than 2% for condensation cure) which speeds up operation and reduces strength, or using the wrong hardness for the product design.

Q:Why does the silicone mold get burnt out?

This occurs when using unsaturated resin materials without demolding within 3 minutes. The resin generates great heat when the curing agent is added. Our silicone rubber contains special materials to resist high temperatures.

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

Condensation silicone rubber solidifies by absorbing moisture from the air. To extend shelf life, water is removed during production. Solution: Add 0.05% water and stir briefly at low speed before use.

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

Weakness is caused by adding too much silicone oil to reduce viscosity, adding excessive catalyst (recommended max 5%, ideally 2%), or using the mold prematurely before the recommended 24-hour curing period.

Q:Why does the mold silicone have poor tension?

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