Why does the mold appear oily?

The oil is caused by adding composite silicone oil (silicone oil and white mineral oil). White mineral oil is a petrochemical product, not silicone oil.

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

This occurs if the original model is not ground or polished, or if the release agent is not applied evenly.

What are the wonderful usages of mold silicone?

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

Resin-Casting RTV2 Liquid Platinum Mold Making Silicone Rubber

Name: Resin-Casting RTV2 Liquid Platinum Mold Making Silicone Rubber
Brand: Dongguan gangtian polymer materials Co.Ltd.
SKU: 2000341975

Guangdong, ChinaDongguan gangtian polymer materials Co.Ltd.

US$6.58

50-99,999,999 kg

US$3.88

100,000,000+ kg

Sample price:US$1.00/kg.Request sample

Product profile

Customization

Available

Raw Material

Silicone Rubber

Material

Silicone Rubber

Model NO.

GTSIL-P25

Appearance

Liquid

Form

Odourless Translucent Liquid Colloid

Component

Part a + Part B (Two Component)

Application

Mold Making

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

Certification

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

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

Adjustable Color: Silicone color is adjustable to meet specific customization needs.

Customizable Packaging: Customization package is available for various drum sizes.

Low Shrinkage: Shrinkage rate is below 0.1% for high precision replication.

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

High Tear Strength: Tear strength ranges from 22 to 26 KN/m2 for durability.

Excellent Fluidity: Low viscosity ensures easy mixing and pouring operations.

Heat and Chemical Resistance: Resistant against heat, acid, alkali, and aging.

Free Samples Available: Free samples can be provided upon request.

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: ≤6.75h 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?

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

Q:Why does the silicone mold get burnt out?

This happens when using unsaturated resin which produces great heat. You must demould the product within 3 minutes. Our rubber includes special material to resist high temperature.

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

It is a condensation silicone rubber that solidifies by absorbing moisture. Solution: Add 0.05% water and stir briefly at low speed before use.

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

Causes include adding too much silicone oil, adding too much catalyst (recommend no more than 5%, ideally 2%), or using the mold prematurely before 24 hours.

Q:Why does the mold silicone have poor tension?

Adding large amounts of silicone oil to reduce viscosity makes the rubber very soft, resulting in poor tensile strength and reduced tear strength.