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

This is a normal physical phenomenon. Liquid produces many bubbles during mixing, so vacuum exhaust bubble treatment is required.

Liquid RTV-2 Silicone Rubber for Casting Craft Mold Making Silicon

Name: Liquid RTV-2 Silicone Rubber for Casting Craft Mold Making Silicon
Brand: GUANGZHOU OTT NEW MATERIALS CO., LTD.
SKU: 1976307125

Guangdong, ChinaGUANGZHOU OTT NEW MATERIALS CO., LTD.

US$6.38-8.00

1 kg

Sample price:US$8.00/kg.Request sample

Product profile

Customization

Available

Raw Material

Natural Rubber

Material

Silicone Rubber

Model NO.

OTT-S815

Appearance

Liquid Silicone

Form

Liquid Rubber

Mixing Ratio

100:3, 100:2, 100:5

Working Time/Pot Life

30~50min

Curing Time

3~4h

Shelf Llife

18 Months

Transport Package

Plywood Pallet

Specification

5kg, 20kg, 25kg, 200kg, 1000kg drum

Trademark

OTT

Origin

China

HS Code

39100000

Production Capacity

8000kg/Day

Key features

High Precision Detail: Excellent performance in reproduction process with fine details on designing models.

Low Shrinkage Rate: Shrinkage is almost zero, below 0.2%, ensuring accurate mold dimensions.

Easy Operation: Amazing fluidity and easy to operate with complex design availability.

Durable Performance: Good resistance to deformation, heat, acid, alkali, and expansion.

Safe and Stable: Stable quality, non-toxic, and odorless with catalyst provided.

Fast Delivery: Delivery time within 3-5 days after payment confirmed in our bank.

Versatile Application: Suitable for artificial stones, crafts, gypsum, GRG, fountains, and more.

Customizable Options: Mixing ratio customizable to 100:3, 100:2, or 100:5 based on 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: ≤9.16h 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 make?

We produce liquid silicone, silicone rubber, and silicone oil. We offer different viscosities, hardness, and density to meet specific client requests.

Q:Do you offer free samples?

Yes, we can provide samples for testing purposes.

Q:How is quality controlled in your factory?

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

Q:How to remove bubbles during mold making?

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

Q:How to get a long-lasting silicone mold?

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