# Weihai Chengjing Technology Co., Ltd.

Silicone, Polyurethane, and Specialty Sealants Manufactured for Export

Importers and distributors worldwide source construction and photovoltaic sealants from a 50,000 t/yr ISO 9001 certified factory in Weihai, China.

- Canonical: https://catalog.reevol.com/p/marketing/weihai-chengjing-technology-co-ltd
- Language: en
- Last updated: 2026-09-08

## Supplier facts

- Supplier type: manufacturer
- Production capacity: 50,000 tons per year
- Export markets: Construction, Photovoltaic, Electric Power, Automotive
- HS codes: 3214.10, 3506.10, 3916.90
- Product categories: Silicone Sealants, Polyurethane Sealants, Acrylic Sealants, MS (Silane Modified) Sealants, Epoxy Adhesives, Fire-Retardant Sealants, Photovoltaic Module Sealants, Construction Adhesives, Nail-Free Adhesives, Spray Paints, Insulating Glass Sealants, Polyurethane Foam
- Years in operation: 15 (est. 2010)

## Certifications

- ISO 9001 Quality Management System: supplier-declared, pending confirmation
- ISO 14001 Environmental Management System: supplier-declared, pending confirmation
- UL94-V0: supplier-declared, pending confirmation

## Product Categories (6)

### Silicone Sealants
One- and two-component silicone sealants covering general glazing, neutral weatherproofing, curtain wall, anti-mildew, high-temperature (-60 °C to 300 °C), and structural bonding applications.
- CJ168 GP Acid Silicone Sealant
- CJ777 Neutral Weatherproofing Silicone Sealant
- CJ921 Curtain Wall Weatherproofing Sealant
- CJ-704 RTV High-Temperature Sealant (-60 °C to 300 °C)

### Fire-Retardant Sealants
UL94-FV-0 and intumescent-grade sealants for fire and smoke penetration sealing, halogen-free and solvent-free formulations available.
- CJ919 Fire-Proof Silicone Sealant (FV-0 rated)
- CJ-135 Intumescent Fireproof Sealant (halogen-free, solvent-free)
- CJ-131 Polymer Fireproof and Waterproof Sealing Sealant (two-component, freeze-thaw resistant)

### Photovoltaic Module Sealants
Neutral-cure silicone sealants and two-component potting adhesives (UL94-V0) engineered for solar panel sealing, bonding, and junction box encapsulation.
- CJ-T28 PV Module Sealant (one-component, neutral-cure)
- CJ-145 PV Junction Box Potting Adhesive (A:B = 5:1, UL94-V0)
- CJ-992 Two-Component Structural Sealant for Insulating Glass
- Cure type: Neutral, one-component, room temperature
- Key feature: No pollution or corrosion on metal, suitable for harsh PV conditions
- Application: Aluminum frame sealing of solar PV modules, junction box to back film bonding, solar lamp sealing

### Polyurethane Sealants and Foam
One- and two-component PU sealants with strong multi-substrate adhesion plus one-component PU foam for construction filling, insulation, and soundproofing.
- PU Sealant (odorless, flexible, thixotropic)
- CJ-998 PU Sealant for Door and Window Corners
- Polyurethane Foam (filling, fixing, insulation, soundproofing)

### Epoxy Adhesives and Grout
Two-component epoxy systems for structural concrete patching (exceeds concrete strength in 3 hours), rebar anchoring, and anti-mildew tile grouting.
- CJ-1455 Polymer Sealant for Concrete Patching (A:B = 1:1)
- CJ-5567 Epoxy Anchoring Adhesive (rebar planting)
- Epoxy Stitching Agent, Porcelain Tile Grout (anti-mildew, non-discoloring)

### MS, Acrylic, Nail-Free Adhesives, and Spray Paint
Silane-modified, acrylic, and construction grab adhesives for low-odor interior and exterior bonding, plus quick-drying aerosol spray paint for indoor and outdoor finishes.
- MS Sealant (sprayable, UV-resistant, low odor)
- Acrylic Sealant (sprayable, mildew-resistant)
- Nail-Free Adhesive (non-toxic, paintable, waterproof)
- Aerosol Spray Paint (quick-drying, flexible finish)
- Drying: Quick drying
- Finish: Durable and flexible
- Substrate compatibility: Wood, metal, plastic, glass surfaces
- Application: Furniture, decorative elements, metal constructions, repairs and refinishing, indoor and outdoor use

## FAQ

**What type of company is Weihai Chengjing, manufacturer, trader, or agent?**

Chengjing is a direct manufacturer based in Weihai, China. Products are made at its own facility with an annual production capacity of 50,000 tons.

**Which sectors do your sealants and adhesives serve?**

Current product lines are formulated for construction, photovoltaic (solar) module assembly, electric power infrastructure, and automotive applications.

**Which certifications do your products hold?**

The company holds ISO 9001 (quality management) and ISO 14001 (environmental management) certifications. The CJ-145 PV Junction Box Potting Adhesive is UL94-V0 rated. Buyers should request product-level certification documents for specific SKUs before ordering.

**What HS codes apply to your products?**

Products are classified under HS 3214.10 (glaziers' putty, grafting putty, resin cements, and caulking compounds), 3506.10 (prepared glues and adhesives), and 3916.90 (monofilaments and rods of plastics). Buyers should confirm applicable codes with their customs broker for their specific import market.

**Do you offer private-label or OEM formulation services?**

This information is not confirmed in the current supplier profile. Submit an inquiry through the form below and specify your OEM or private-label requirements; the Chengjing team will respond directly.

**How do I request pricing or product samples?**

Use the inquiry form on this page, include the SKU name or product category, your target market, and estimated annual volume. The Chengjing team will follow up with pricing and sample availability.

## Contact

- Inquiry endpoint (POST form): https://catalog.reevol.com/api/marketing/inquiry/weihai-chengjing-technology-co-ltd