Why do bubbles form when adding the curing agent?

This is a normal physical phenomenon. Liquid produces many bubbles during mixing, so vacuum exhaust treatment is necessary to remove them.

High-Quality RTV2 Silicone Rubber for Precision Mold Making

Name: High-Quality RTV2 Silicone Rubber for Precision Mold Making
Brand: GUANGZHOU OTT NEW MATERIALS CO., LTD.
SKU: 1980913215

Guangdong, ChinaGUANGZHOU OTT NEW MATERIALS CO., LTD.

US$5.55-7.88

1 kg

Sample price:US$8.00/kg.Request sample

Product profile

Customization

Available

Material

Organic Silicone

Application

Industrial, Agricultural, Mold Making

Model NO.

OTT-S820

Certification

ISO, FDA, REACH

Mixing Ratio

100:3, 100:2, 100:5

Working Time/Pot Life

30~50min

Curing Time

3~4h

Shelf Life

18 Months

Delievery Term

EXW, Fob, CIF, C&F, DDP, etc

Transport Package

20kg/Drum, 25kg/Drum or 200kg/Drum

Specification

Liquid Silicone

Trademark

OTT

Origin

China

HS Code

39100000

Production Capacity

8000kg/Day

Key features

High Precision & Low Shrinkage: Shrinkage rate below 0.2% ensures fine detail reproduction for intricate molds.

Wide Hardness Range: Available in 20-40 Shore A hardness options to suit various application needs.

Excellent Physical Properties: High tear strength and elongation provide durable, long-lasting silicone molds.

Easy Operation & Fast Cure: Room temperature curing in 3-5 hours with good fluidity for complex designs.

Safe & Stable Quality: Non-toxic, odorless, and stable quality with ISO, FDA, and REACH certifications.

Customizable Mixing Ratios: Mixing ratios of 100:3, 100:2, and 100:5 available to meet specific client requests.

Versatile Applications: Ideal for plaster, GRC, resin crafts, art sculptures, and various industrial molds.

Fast Delivery: Delivery within 3-5 days after payment confirmation via air or sea freight.

Company profile

GUANGZHOU OTT NEW MATERIALS CO., LTD.

Guangdong, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service AvailableExport Year: 2022-07-27 CertifiedNearest Port: Shenzhen Port, Guangzhou PortAverage Response Time: ≤8.92h CertifiedTerms of Payment: LC, T/T, PayPal, etc.

AI-Powered supplier vetting

SummaryGuangzhou OTT New Materials Co., Ltd. is a China-based limited company established in 2014, operating in silicone and related chemical materials. It reports five production lines, a 1,700 m² manufacturing plant, broad product coverage, exports representing 90% of total sales, and stated peak- and off-peak-season fulfillment within 15 working days. The supplier holds ISO 9001:2015 certification and describes technical support, after-sales service, and silicone-material innovation capabilities. However, the available information indicates a relatively small organization of 17 employees, fewer than five quality-control staff, and limited documented customer-trade evidence. Financial strength, customization performance, and the depth of customer cases cannot be conclusively assessed from the provided data.

Supplier typeThe supplier is identified as Guangzhou OTT New Materials Co., Ltd., a China-based limited company operating in chemicals and silicone materials. Its listed products include architectural-restoration silicone and mold-making silicone, while its broader product keywords cover multiple liquid, RTV, cured, and specialty silicone products.

CertificationsThe supplier reports holding an ISO 9001:2015 certificate, providing explicit evidence of a certified quality-management system. No other certifications are stated in the provided information.

After-Sales capabilityThe supplier states that three doctoral senior researchers and 12 professional engineers support quality improvement, product development, innovation, and after-sales service. It also explicitly claims to provide technical solutions, after-sales service, and ongoing technical support, although no service-performance metrics or response-time data are provided.

R&D capabilityThe supplier explicitly reports top technology in condensation and addition-cured silicone in China and identifies doctoral researchers and professional engineers supporting new-product development and innovation. Its stated range of related silicone materials further supports technical breadth, though no independently verified innovation results are provided.

Production capacityThe supplier reports five production lines, a 1,700 m² manufacturing plant, and order fulfillment within 15 working days in both peak and off-peak seasons. Its product scope is broad and export sales are stated to represent 90% of total sales, but the small total workforce of 17 employees and fewer than five quality-control staff indicate that operational scale should be verified for large-volume requirements.

Product Q&A

Q:What types of silicone products do you manufacture?

We produce liquid silicone, silicone rubber, and silicone oil. Our silicone viscosity, hardness, and density vary to meet specific client requirements.

Q:Do you provide free samples for testing?

Yes, we can provide free samples for clients to test the product quality.

Q:How do you ensure product quality?

We have a professional QC team controlling quality during production. All goods are 100% inspected before shipment.

Q:How can I remove bubbles during mold making?

After mixing the liquid silicone with the curing agent, place the mixture in a vacuum machine to remove the bubbles.

Q:How can I extend the lifespan of my silicone mold?

Choose the correct liquid silicone for your product, avoid using silicone oil (which makes molds too soft), and allow the mold to fully cure for at least 2 hours after completion.