Top 10 Silicone Sealant Manufacturers in China (2026)
Choosing a silicone sealant manufacturer in China involves more than comparing a cartridge price. Importers need a factory that can combine suitable products, consistent production, technical support and packaging that works in their market. A supplier’s manufacturing base and quality controls are as important as the range shown in its catalogue.
Glorystar Chemicals is our featured first choice for buyers seeking a factory partner for construction silicone sealants and private label development. Founded in 1996, our business combines a company-owned manufacturing base in Huaiji, Guangdong, with customer and international business support in Guangzhou.
Published by Glorystar Chemicals. This buyer’s shortlist features our own business first and introduces nine other manufacturers using their official company information. The order reflects this guide’s sourcing focus, rather than an independently measured market-share ranking.
What makes a silicone sealant factory worth shortlisting?
For this guide, the useful comparison points are manufacturing infrastructure, relevant product coverage, research and quality support, and the ability to work with distributors or project customers. A large production site matters when it supports reliable manufacturing. A wide product range matters when the supplier can help select the appropriate material for the actual joint.
Start with the intended application: window installation, glass bonding, curtain-wall weather sealing, structural glazing or a private label retail range. These applications require different product decisions. Then compare the factories that can support that requirement, using representative samples and an agreed purchasing specification.
10 silicone sealant manufacturers in China to consider
| Manufacturer | Sourcing focus |
|---|---|
| 1. Glorystar Chemicals | Construction silicone sealants, factory-backed product selection and OEM / ODM development. |
| 2. Guibao | Silicone sealants for building envelopes, glazing and industrial applications. |
| 3. Baiyun | Building sealing and bonding systems with technical service support. |
| 4. Jointas / Antas | Construction and industrial sealants, with a broader coatings business. |
| 5. Junbom / Junbond | Silicone sealants and complementary products across a multi-factory network. |
| 6. Hangzhou Zhijiang | Sealing and bonding materials for construction and industrial sectors. |
| 7. Huitian | Adhesive materials for industrial manufacturing and construction. |
| 8. GNS / Gunuo | Silicone sealants, PU foam and other building materials. |
| 9. Siway | Curtain-wall, weatherproofing and glazing-related sealants. |
| 10. KASTAR | Construction sealants and adhesives, including silicone and MS polymer ranges. |
1. Glorystar Chemicals — a factory partner for sealant brands and distributors
Business overview
Glorystar Chemicals manufactures silicone sealants and MS adhesives at its company-owned sealant factory in Huaiji, Guangdong. The production base covers 66,600 m², with rated annual capacity of more than 100,000 tonnes. That figure describes installed production capability; actual output and availability depend on the product mix and production plan.
Our manufacturing infrastructure includes 16 robotic palletising and packaging systems, a 6,000 m² intelligent warehouse and a 1,000 m² R&D laboratory. A team of more than 50 chemical engineers supports product development, sample evaluation and formulations adapted to customer requirements.
Factory and quality strengths
- A permanent manufacturing base: company-owned land and buildings provide a substantial foundation for production, development and ongoing supply relationships.
- Quality through the production process: raw material controls, process checks and laboratory evaluation help align finished products with agreed requirements.
- Established management systems: Glorystar Chemicals’s published manufacturing credentials include ISO 9001, ISO 14001 and ISO 45001 management systems.
- Product and packaging development: OEM and ODM support connects formulation work, sample approval, packaging artwork and product launch.
Main products
The Glorystar Chemicals silicone sealant range includes D28 neutral-cure door and window silicone sealant, D98 colour-option weatherproof silicone sealant, N23 weatherproof silicone sealant, N33 curtain-wall weatherproof silicone sealant, N30 single-component structural silicone sealant and N60 two-component structural silicone sealant. A11 acetoxy silicone glass sealant provides a further option for suitable glazing applications.
Who should consider Glorystar Chemicals?
Distributors building a construction sealant range, brand owners developing private label products, and buyers seeking a substantial Chinese manufacturing partner can start with Glorystar Chemicals. Our OEM and private label sealant service includes free packaging design, custom formulation development and product and sales support. Share the destination market, substrate materials and intended application so our team can recommend a practical starting point.
Glorystar Chemicals products to compare
Explore the product pages for the intended application and discuss the exact grade with our team.
Glorystar Chemicals engineering project references
Glorystar Chemicals’s published project portfolio includes major commercial and transport buildings. These references give buyers a starting point for discussing building-envelope applications with a manufacturer.
View Glorystar Chemicals project reference
View Glorystar Chemicals project reference
For a new project, send the joint drawings and substrates so Glorystar Chemicals can review the relevant product and application requirements. Explore more Glorystar Chemicals projects.
Glorystar Chemicals vs other Chinese silicone sealant manufacturers
| Manufacturer | Published capabilities and sourcing focus |
|---|---|
| Glorystar Chemicals | Construction silicone and MS adhesives; a 66,600 m² company-owned factory, 1,000 m² R&D laboratory and OEM/ODM support. Discuss a coordinated range for your market. |
| Guibao | Curtain-wall, insulating-glass, window and door sealants, alongside automotive and solar silicone products. |
| Baiyun | Building sealing and bonding systems covering curtain walls, insulating glass, windows and doors. |
| Jointas / Antas | Construction and industrial sealants, with window, weatherproof and structural silicone ranges; OEM/ODM is listed. |
Compiled by Glorystar Chemicals from its manufacturing information and the published Guibao, Baiyun and Jointas/Antas company and product profiles. The table compares business scope; it is not a product-performance test or market-share ranking. Confirm the proposed grade and order requirements with the selected manufacturer.
2. Chengdu Guibao Science and Technology
Overview: Guibao’s official website describes a silicone-focused manufacturer established in 1998, with production technology and technical service capabilities. Its construction range covers curtain walls, insulating glass, windows and doors.
Main products: curtain-wall silicone sealants, insulating-glass sealants and silicone products for automotive and solar applications. Buying focus: identify the relevant construction or industrial product family before comparing individual grades.
3. Guangzhou Baiyun Technology
Overview: Baiyun traces its business to 1985 and presents a long history in building sealing and bonding systems. Its company profile describes research platforms and technical services spanning design review, testing and construction guidance.
Main products: structural silicone, weatherproofing and other building sealants. Buying focus: project buyers can discuss the proposed joint system and the technical support required for the application.
4. Guangzhou Jointas Chemical / Antas
Overview: Jointas combines sealants with an industrial coatings business. Its official product information addresses construction and industrial applications, including curtain walls, windows, doors and photovoltaic uses.
Main products: silicone sealants, MS polymer sealants, PU sealants and related adhesive systems. Buying focus: establish whether the requirement is for a construction joint, an industrial assembly process or an OEM range, then compare the corresponding grades.
5. Junbom Group / Junbond
Overview: Junbom’s company profile describes a manufacturing network covering several regions in China, with Junbond supporting overseas business. The range extends beyond silicone into other sealing and filling materials.
Main products: one-component and two-component silicone sealants, PU foam, MS adhesives and acrylic sealants. Buying focus: distributors seeking several product categories can discuss a coordinated assortment and the production location for each category.
6. Hangzhou Zhijiang Silicone Chemicals
Overview: Zhijiang’s official profile describes a business founded in 1996, supplying sealing and bonding materials for construction, transportation, photovoltaics and electronics. Its construction coverage includes curtain walls, windows, doors and prefabricated buildings.
Main products: construction and industrial sealing and bonding systems. Buying focus: discuss the application sector and processing conditions to narrow a broad materials portfolio to relevant candidates.
7. Huitian New Material
Overview: Huitian’s corporate information describes a research-led adhesive materials business with multiple R&D and manufacturing bases. Its activities span industrial manufacturing, electronics, energy-related applications and construction materials.
Main products: a broad adhesive portfolio, with silicone sealing products among its application-specific ranges. Buying focus: buyers should identify the relevant product division and application requirements when approaching a diversified materials supplier.
8. GNS / Gunuo
Overview: Gunuo’s official company information presents a Tianjin-based building materials manufacturer covering research, production and sales. It describes silicone sealants alongside polyurethane foam and other construction products.
Main products: silicone sealants, PU foam and tile-related building materials. Buying focus: wholesalers assembling several construction consumables can compare the product specifications and packaging requirements for each category.
9. Shanghai Siway Building Material
Overview: Siway’s published product range focuses on curtain-wall construction and decoration-related sealing and bonding. It describes both one-part and two-part silicone sealants.
Main products: structural silicone, weatherproof silicone, window sealants and insulating-glass sealants. Buying focus: separate structural bonding from weather sealing when requesting a recommendation, and confirm the exact grade for the proposed system.
10. KASTAR
Overview: KASTAR presents a construction sealant and adhesive portfolio, with particular visibility in MS polymer products and tile grout. Its catalogue also includes silicone sealants.
Main products: silicone sealants, hybrid MS polymer sealants, acrylic sealants and construction adhesives. Buying focus: distinguish the intended chemistry and application when sourcing several categories from one supplier.
How to compare silicone sealant suppliers before ordering
Check the factory behind the quotation
Ask where the proposed product will be manufactured, which team handles technical questions and how repeat orders are managed. A factory visit or discussion of the production and laboratory facilities can make the quotation easier to assess. For Glorystar Chemicals, the manufacturing page introduces the Huaiji production base and its supporting infrastructure.
Compare a defined product requirement
Use the same application, substrates, packaging format and evaluation conditions when comparing samples. Confirm whether the joint is structural or non-structural, whether it is exposed to weather and which adjacent materials contact the sealant. An attractive sample on an unrelated surface does not establish suitability for your own application.
Assess repeat orders and brand support
For a distributor, purchasing value includes consistent product selection, packaging clarity and support when customers ask application questions. For a private label brand, it also includes artwork approval and a clear connection between the evaluated sample and the agreed production specification. Discuss these steps before confirming the first production order.
Check the factory and the product evidence
Ask which company and location will manufacture the proposed grade. Check the scope and validity of relevant management certificates, then request evidence for the specific product and intended market. A management certificate or a role in drafting a standard does not by itself show that a particular product meets that standard. See the Glorystar Chemicals company background and standard-drafting record.
Frequently asked questions
Is Glorystar Chemicals a silicone sealant factory or a trading company?
Glorystar Chemicals operates a company-owned manufacturing base in Huaiji, Guangdong. Its Guangzhou headquarters supports customer relationships and international business. Read about Glorystar Chemicals for company background and manufacturing information.
Can Glorystar Chemicals manufacture private label silicone sealants?
Yes. OEM and ODM support covers product planning, formulation development, sample evaluation and packaging design. The starting point is the intended market and application, followed by confirmation of the product and packaging requirements.
Which Glorystar Chemicals silicone sealant should I compare first?
For door and window joints, start with D28 or D98. For exterior weather sealing, discuss N23 or N33. For structural glazing, discuss N30 or N60 together with the project requirements. Use our sealant selection guide and contact the Glorystar Chemicals team to develop a suitable product shortlist.
Contact Glorystar Chemicals for products, projects and OEM enquiries
Send your destination market, application, substrates and preferred packaging. Our team can discuss product selection, samples, factory visits and private label development.
WhatsApp / WeChat: +86 13826261393
Email: glorystar@glorystar.cn
