Why does silicone rubber produce many bubbles after adding curing agent?

This is a normal physical phenomenon. The liquid produces a large number of bubbles during mixing, so it must pass through vacuum exhaust bubble treatment.

Versatile RTV2 Silicone Rubber for Gypsum Crafting and Moulds

Name: Versatile RTV2 Silicone Rubber for Gypsum Crafting and Moulds
Brand: GUANGZHOU OTT NEW MATERIALS CO., LTD.
SKU: 1992649085

Guangdong, ChinaGUANGZHOU OTT NEW MATERIALS CO., LTD.

US$4.80-6.88

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

Mixing Ratio

100:3, 100:2, 100:5

Working Time/Pot Life

30~50min

Curing Time

3~4h

Shelf Life

18 Months

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

Versatile Application Range: Suitable for gypsum crafts, resin marble, shoe soles, furniture moldings, and more.

High Performance Duplication: Excellent resistance to deformation, heat, acid, alkali with fine detail reproduction.

Low Shrinkage Rate: Shrinkage is almost zero, remaining below 0.2% for accurate mold making.

Excellent Tear Strength: High tension and tear strength ensure durable molds for repeated use.

Non-Toxic and Odorless: Stable quality with no oily residue, safe for various crafting applications.

Fast Curing Time: Cures completely within 3 to 5 hours at 25 degrees Celsius.

Easy De-molding: Features amazing fluidity and easy operation for complex designs.

Customizable Mixing Ratio: Available in 100:3, 100:2, and 100:5 mixing ratios for different needs.

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: ≤8.60h 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 silicone products do you make?

We produce liquid silicone, silicone rubber, and silicone oil. Different molds require silicone with varying viscosity, hardness, and density to meet client requests.

Q:Do you offer free samples?

Yes, we can provide samples for testing.

Q:How do you control quality in your factory?

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

Q:How to remove bubbles during mould making?

After mixing liquid silicone with the curing agent, put the material into a vacuum machine to remove the bubbles.

Q:How to get a good silicone mould for longer use?

Choose the right liquid silicone for your products, avoid using silicone oil as it makes the mould too soft, and wait 2 hours after mould finishing for full curing.