Why does the mold appear oily?

The silicone itself does not emit oil. The oil is caused by adding composite 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 occurs if the original model or product was not ground or polished smooth enough, or if the release agent was not applied evenly.

What are the wonderful usages of mold silicone?

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

Resin Epoxy Molds

Name: Addition Cure RTV2 Liquid Silicone Rubber for Mold Making Candle/Soap/Resin Epoxy Molds
Brand: Dongguan gangtian polymer materials Co.Ltd.
SKU: 2011152525

Guangdong, ChinaDongguan gangtian polymer materials Co.Ltd.

US$7.88

200-999 kg

US$6.68

1,000-4,999 kg

US$6.38

5,000-9,999,999 kg

US$4.88

10,000,000+ kg

Sample price:US$8.00/kg.Request sample

Product profile

Customization

Available

Raw Material

Silicone Rubber

Material

Silicone Rubber

Model NO.

GTSIL-P0 ~ GTSIL-P65

Appearance

Liquid

Form

Odourless Translucent Liquid Colloid

Component

Part a + Part B (Two Component)

Application

Mold Making or Silicone Material

Mixing Ratio

1:1, 10:1, 9:1

Customiation Service

Color, Package

Hardness Shore a

00-65 Shore a

Shrinkage - %

Below 0.1%

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

Food Grade Safety: Platinum cured silicone rubber is food grade and safe for contact with food items.

Low Shrinkage Rate: Shrinkage is less than 0.1% ensuring high precision in mold replication.

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

Customizable Color: Color customization service is available for specific requirements.

Excellent Detail Replication: High fluidity and tension allow for capturing fine details and easy demolding.

Versatile Applications: Suitable for candles, soaps, jewelry, prosthetics, and various resin casting.

Fast Sample Delivery: Samples can be shipped within 1-3 days after payment receipt.

Certified Quality: Products hold FDA, REACH, ROHS, and MSDS certifications for safety.

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: ≤6.89h 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?

Common reasons include adding too much silicone oil which destroys molecular weight, adding excessive catalyst (more than 2% for tin 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 happens when using unsaturated resin which generates heat. You must demould the product within 3 minutes. Our silicone rubber contains special materials to resist high temperatures and prevent this issue.

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

This is typical for condensation silicone rubber which solidifies by absorbing moisture. To fix this, add 0.05% water to the silicone rubber 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, adding excessive catalyst (recommend no more than 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 a large amount of silicone oil to reduce viscosity makes the rubber too soft, resulting in poor tensile strength, short service life, and fewer mold turnovers.