Choosing the right silicone supplier in China is not always simple. Some companies focus on silicone materials, some specialize in sealants or additives, while others support custom molded silicone products from design to production.
For buyers, the real question is not only “Which silicone supplier is the biggest?” but also:
Which supplier is the right fit for my project?
A company looking for silicone raw materials may need a different partner from a brand developing a baby teether, kitchen tool, industrial rubber part, or custom silicone component. Understanding each supplier’s main business can help buyers save time, reduce communication mistakes, and avoid choosing the wrong type of manufacturer.
This guide introduces 10 silicone suppliers related to the China market, including well-known international material companies, Chinese silicone manufacturers, sealant suppliers, and one custom silicone product manufacturer. It also explains how to choose the right partner based on your product stage, technical requirements, and production goals.
1. Kastar adhesive Co.,Ltd
Founded in 1997, Kastar is the largest professional OEM & ODM manufacturer of adhesive sealants in China, with 50,000 square meters of factories. Having professional manufacturing equipment and facilities, and with 27 years of experience specializing in construction adhesive sealants and a strict quality control system, we created the top-class KASTAR®.
Kastar has three factories in Foshan and Longkou, covering an area of 50,000 square meters, with over 200 employees. It is one of the top five silicone sealant manufacturers in China. In addition, Kastar is equipped with a 1,500-square-meter national-level laboratory, 18 national-level engineers, 16 national patents, and over 100 testing devices. We are committed to providing the highest quality silicone sealants on the market.
Advantages
- Strong technical expertise and long industry history.
- Widely used in landmark building curtain walls in China.
- Comprehensive testing and quality systems geared to construction codes.
Disadvantages
- Product portfolio is heavily tilted toward construction, with relatively less visibility in consumer DIY channels.
- Lead times can be longer for small export orders due to focus on large projects.
Main products
Hybrid MS polyester polymer sealants; Silicone Sealants; Firestop Sealants; Acrlyic latex caulk sealants; PU sealant; Epoxy tile grout; Swimming pool grout etc,
2. Dongyue Group
Dongyue Group is one of China’s large chemical enterprises with businesses covering fluorine and silicon materials. It has a strong presence in organosilicon materials, silicone rubber, silicone fluids, and related chemical products.
Dongyue is more suitable for industrial buyers, material distributors, and companies sourcing silicone chemical materials at scale. Its strength lies in production capacity, chemical manufacturing, and material supply.
For buyers developing finished silicone products, Dongyue may not directly solve product-level questions such as mold structure, parting line, product appearance, printing, packaging, or small MOQ testing. These issues usually need support from a finished-product manufacturer.
3. Zhejiang Xinan Chemical Industrial Group
Zhejiang Xinan Chemical Industrial Group is known in the chemical and organosilicon industry. Its business includes organosilicon materials and related chemical products used in industrial applications.
For customers sourcing silicone-related chemical materials, Xinan can be a relevant supplier. Its advantage is more connected to upstream chemical manufacturing and industrial material production.
For buyers who already have manufacturing partners and only need materials, this type of supplier may be suitable. But for buyers who only have a product idea, sample, drawing, or reference photo, they usually need a factory that can help with engineering, mold development, production testing, and final product delivery.
4. Jiangsu Hongda New Material
Jiangsu Hongda New Material is another company involved in silicone-related materials, including silicone intermediates and industrial silicone products.
Its business is more aligned with material supply and chemical industry applications. Buyers looking for silicone oils, intermediates, or related material supply may consider this type of company.
However, if your goal is to create a custom silicone product for retail, Amazon, industrial assembly, baby products, kitchenware, pet products, or branded consumer goods, material supply alone is not enough. You will need a partner who understands product structure, molding feasibility, tooling cost, surface finish, color matching, packaging, and production consistency.
5. XJY Silicones
XJY Silicones is known for silicone resin products, especially MQ silicone resin applications. MQ silicone resins are often used in adhesives, coatings, pressure-sensitive materials, personal care, and other specialty applications.
This type of supplier is suitable for customers who need resin-based silicone solutions or specific chemical performance in coatings and adhesive systems.
For finished product buyers, XJY may be useful if the product involves adhesive performance or material formulation. But if the project is a molded silicone part, such as a teether, sleeve, cover, mat, gasket, stopper, or overmolded part, the buyer still needs a molding-focused manufacturer.
6. Runhe Materials
Runhe Materials focuses on functional silicone materials and specialty applications. Its products are often connected with textile finishing, silicone additives, and industrial material treatment.
Runhe can be suitable for buyers who need silicone-related chemical solutions for textiles, surface treatment, coatings, or functional additives.
For custom molded silicone products, however, the required supplier capability is different. A molded product project requires DFM review, mold design, compression molding or injection molding experience, sampling, trimming, inspection, and final assembly or packaging.
This is why buyers should first define the project type before contacting suppliers. A material-focused supplier may be excellent in its field, but it may not be the right partner for finished product development.
7. HB Silicone
HB Silicone is a custom silicone product manufacturer in China focusing on OEM and ODM silicone product development. Unlike companies that mainly supply silicone materials, sealants, resins, or additives, HB Silicone works at the finished product level.
This means HB Silicone helps customers turn product ideas, drawings, samples, or reference concepts into molded silicone products ready for testing, branding, and mass production.
HB Silicone’s main capabilities include:
- Custom silicone compression molding
- Silicone product design support
- DFM review and structure optimization
- In-house mold development
- Prototype sampling
- Small-batch trial production
- Mass production
- Silicone overmolding with metal or plastic parts
- Logo customization
- Surface texture, matte finish, and color matching
- Packaging support for branded products
For brands, startups, Amazon sellers, product designers, and industrial buyers, this type of supplier is often more practical than a material company. Most buyers do not only need silicone. They need a finished product that can be manufactured, tested, packed, shipped, and sold.
8. Jiujiang Deep Sea Technology Development Co., Ltd.
Jiujiang Deep Sea Technology Development Co., Ltd. is a leading player in the silicone sealant industry. The company is committed to research, development, production, and sales of high – quality silicone sealants. It has a state – of – the – art production base equipped with advanced manufacturing equipment and strict quality control systems.
The company’s R & D team consists of experienced chemists and engineers who are dedicated to developing innovative silicone sealant products. They continuously explore new formulas and technologies to meet the evolving needs of different industries. For example, they have developed high – performance silicone sealants for the aerospace industry, which can withstand extreme temperatures and pressures.
In terms of production, Jiujiang Deep Sea Technology Development Co., Ltd. adheres to strict environmental and safety standards. The production process is highly automated, which not only improves production efficiency but also ensures the consistency and quality of the products. The company’s products are widely used in various fields, including construction, automotive, and electronics.
9. Dow Corning (China) Co., Ltd.
Dow Corning is a well – known global brand in the silicone industry, and its Chinese subsidiary, Dow Corning (China) Co., Ltd., has a significant presence in the Chinese market. The company has a long – standing reputation for producing high – quality silicone products.
Dow Corning (China) Co., Ltd. has a large – scale production facility in China, which is capable of producing a wide range of silicone sealants. The company focuses on sustainable development and has implemented many green initiatives in its production process. For example, it uses energy – efficient equipment and reduces waste generation.
The company also has a strong R & D center in China, which collaborates with global R & D teams. This allows it to introduce the latest silicone sealant technologies and products to the Chinese market. Their products are used in high – end construction projects, luxury automotive models, and advanced electronics.
10. Honghua Industrial Co., Ltd.
Honghua is cited as one of the larger Chinese producers of silicone-related materials and silicone sealants, supplying both domestic and overseas markets. Its portfolio spans sealants, adhesives, and various silicone materials used in construction, automotive, and consumer goods.
Main products
Neutral and acetoxy silicone construction sealants.
Specialized sealants for automotive and consumer goods use.
Auxiliary silicone materials and modifiers.
