Why does the mold appear oily?

The mold itself does not emit oil; the oil is caused by adding composite silicone oil containing 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 polished or if the release agent is not applied evenly on the mold surface.

What are the wonderful usages of mold silicone?

It is used in toy, gift, furniture, character reproduction, building decoration, resin handicraft, candle craft, and sculpture industries for product replication.

Silicone Base LSR Liquid Silicone Rubber Suitable for Pouring Brushing and Injection

Name: Silicone Base LSR Liquid Silicone Rubber Suitable for Pouring Brushing and Injection
Brand: Dongguan gangtian polymer materials Co.Ltd.
SKU: 2006469332

Guangdong, ChinaDongguan gangtian polymer materials Co.Ltd.

US$7.88

50-199 Pieces

US$7.58

200-99,999,999 Pieces

US$3.88

100,000,000+ Pieces

Sample price:US$1.00/kg.Request sample

Product profile

Customization

Available

Material

Silicone

Application

Household, Medical, Industrial, Agricultural, Mold Making

Model NO.

GTSIL-P00 ~ GTSIL-P60

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

00-60 Shore a

Shrinkage - %

Below 0.1%

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

Multi-Application Versatility: Suitable for pouring, brushing, and injection in household, medical, industrial, and agricultural sectors.

Low Shrinkage Performance: Ensures high precision with shrinkage rate below 0.1% for accurate mold replication.

Customizable Color and Package: Offers tailored color options and packaging solutions to meet specific client requirements.

Wide Hardness Range: Available in Shore A 00-60 to accommodate various mold making needs and product designs.

Long Shelf Life: Provides up to 18 months of stability for extended storage and usage without degradation.

Multiple Certification Compliance: Meets global standards including ISO, FDA, REACH, and RoHS for safety and quality assurance.

Flexible Mixing Ratios: Supports 1:1, 10:1, and 9:1 mixing ratios for diverse curing requirements and applications.

Free Sample Availability: Customers can request free samples to test product quality before placing bulk 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: ≤7.56h 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 could the silicone mold be reused only for a few times?

This may happen due to adding too much silicone oil which destroys molecular weight, adding too much catalyst (over 2% for tin catalyst) which reduces tension, or using wrong hardness for the design size.

Q:Why does the silicone mold get burnt out?

Burnt out molds occur when using unsaturated resin without demoulding within 3 minutes, as the resin generates great heat when the curing agent is added.

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

This is due to condensation silicone rubber absorbing moisture from the air. Solution: Add 0.05% water 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 excessive catalyst (over 5%), or using the mold prematurely before 24 hours of curing.

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 and reducing its durability and service life.