Premium Silicone Sealing Strips for Architectural Excellence

• Customization: Available
• Material: Organic Silicone
• Application: Household, Medical, Industrial, Agricultural
• Model NO.: solid silicone strip
• Certification: ISO, REACH, RoHS
• Transport Package: Carton + Pallet
• Specification: customized
• Trademark: Dachuang Kehua
• Origin: China
• HS Code: 3910000000
• Production Capacity: 1000000 Sqm/Week
• Package Size: 40.00cm * 20.00cm * 35.00cm
• Package Gross Weight: 12.000kg

Product Description

Product Description

High-End Silicone Rubber Sealing Strips for Doors and Windows in Construction

High-end silicone rubber sealing strips are premium, high-performance sealing components engineered specifically for construction applications. Manufactured through high-temperature vulcanization (HTV) processes, these strips offer a level of performance far superior to that of conventional door and window seals.

Key Advantages Over Ordinary Seals

Unlike traditional rubber or plastic seals, silicone rubber sealing strips exhibit:

• Excellent Temperature Resistance: Maintain flexibility and sealing performance in extreme environments, from sub-zero temperatures to heat exceeding 200°C.

• Superior Weather Resistance: Exceptional resistance to UV rays, ozone, and long-term weathering ensures durability and reliability in harsh outdoor conditions.

• Aging and Degradation Resistance: Retains elasticity and function over time without becoming brittle or cracked, even after prolonged exposure to sunlight and air.

• Non-Toxicity & Physiological Inertness: Safe for use in environments with stringent health and environmental requirements-ideal for green buildings and indoor applications.

• Good Breathability: Helps prevent moisture accumulation while maintaining thermal insulation and soundproofing integrity.

Outstanding Physical and Mechanical Properties

• Low Density & High Extrusion Yield: Offers more linear meters per kilogram, reducing material usage and cost in large-scale projects.

• High Elastic Recovery: Maintains excellent compression set and rebound characteristics, ensuring a long-lasting, tight seal even under repeated stress.

• Versatile Processing Capability: Easily formed into complex profiles with consistent dimensions, allowing compatibility with a wide range of architectural designs and systems.

Ideal Applications

These silicone sealing strips are widely used in:

• Building Curtain Wall Systems

• Aluminum Alloy Doors and Windows

• PVC or Wooden Window Frames

• Glass Facades and Skylights

• Energy-Efficient and Passive House Installations

Whether used in residential, commercial, or high-rise projects, high-end silicone rubber sealing strips deliver reliable, long-lasting protection against air, water, noise, and dust infiltration-helping improve energy efficiency, indoor comfort, and structural longevity.

Key Features of High-End Silicone Rubber Sealing Strips

1. Wide Temperature Resistance

   • Performs reliably in temperatures ranging from -60°C to +200°C, ensuring functionality in extreme cold or heat.

2. Excellent Weather & UV Resistance

   • Withstands long-term exposure to sunlight, ozone, and rain without degradation, cracking, or loss of elasticity.

3. Superior Aging and Durability

   • Maintains shape and sealing effectiveness over time, with minimal compression set and excellent long-term resilience.

4. Non-Toxic & Environmentally Friendly

   • Free from harmful substances; safe for green buildings, indoor environments, and applications requiring physiological inertness.

5. Low Density & High Extrusion Efficiency

   • Lightweight with high material yield, reducing production costs and improving installation efficiency.

6. Excellent Elastic Recovery

   • Quickly returns to its original shape after compression, ensuring a tight and lasting seal.

7. Good Air Permeability & Moisture Management

   • Allows for controlled breathability, preventing condensation and enhancing insulation performance.

8. Chemical Resistance

   • Resists oils, solvents, acids, and alkalis, making it suitable for industrial and coastal environments.

9. Customizable Profiles & Colors

   • Easily molded or extruded into various shapes and sizes; available in custom colors to match architectural aesthetics.

10. Fire Resistance (Optional Grades)

• Can be formulated to meet UL94 V-0 or other flame-retardant standards, suitable for high-safety buildings.

Production

Solid Silicone Production Management Workflow

1. Raw Material Selection

• Base Material: High-purity silicone rubber (LSR or HTV)

• Additives:

  • Curing agents (peroxide or platinum-based)

  • Reinforcing fillers (e.g., silica)

  • Flame retardants, colorants, UV stabilizers

• Key Requirement: Compliance with RoHS, FDA, REACH, and industry-specific standards

2. Formula Development & Testing

• Define hardness (Shore A), tensile strength, elongation, and thermal stability

• Lab trials for:

  • Cure time/temperature optimization

  • Color consistency

  • Mechanical performance validation

• Maintain a formulation database for traceability

3. Mixing & Compounding

• Equipment: Internal mixers, two-roll mills, or twin-screw extruders

• Critical Controls:

  • Precise additive dosing

  • Homogeneous dispersion

  • Degassing to eliminate trapped air

  • Viscosity & pot life monitoring

4. Molding & Curing

• Process Options:

  • Compression Molding (for sheets, gaskets)

  • Injection Molding (complex geometries)

  • Extrusion (profiles, tubing)

• Curing Parameters:

  • Temperature: 120-200°C

  • Pressure: 5-20 MPa

  • Time: 2-15 min (varies by thickness)

5. Post-Curing (If Required)

• Secondary heat treatment (e.g., 4 hrs at 200°C) to enhance:

  • Crosslinking density

  • Thermal stability

  • Volatile removal (critical for medical/food-grade)

6. Secondary Processing

• Cutting/Trimming: Die-cutting, CNC, laser, or waterjet

• Surface Treatments: Plasma coating, adhesive lamination

• Assembly: Bonding with metals/plastics (for multi-material parts)

7. Quality Control & Testing

• Mechanical Tests: Hardness, tensile strength, compression set

• Thermal Tests: TGA, DSC, heat aging resistance

• Chemical Resistance: Oil, acid, solvent exposure

• Dimensional Checks: Thickness, flatness, tolerances (±0.1mm)

• Certifications: ISO 9001, ISO 13485, IATF 16949

8. Packaging & Storage

• Anti-static or vacuum-sealed packaging

• Labeling: Batch #, manufacture date, shelf life

• Storage: <30°C, 50% RH, away from direct sunlight

9. Documentation & Traceability

• Records: Batch logs, QC reports, material certificates

• ERP/MES Integration: Real-time tracking of production KPIs (yield rate, scrap rate)

Best Practices for Solid Silicone Production

Preventive Maintenance: Regular calibration of molds and presses
Operator Training: Standardized SOPs for consistency
Continuous Improvement: Root-cause analysis for defects (e.g., air traps, uneven curing)
Sustainability: Recycle trim waste into reusable feedstock

Quality control

Solid Silicone Rubber Production Workflow - High-Performance Applications

Solid silicone rubber (HTV or HCR) is widely used for gasketing, insulation, and sealing in demanding sectors such as automotive, aerospace, and healthcare. Below is a comprehensive production workflow:

1. Material Preparation

• Base Polymer Selection: Choose high-purity HTV silicone gum

• Additive Integration: Mix reinforcing fillers (e.g., fumed silica), pigments, and curing agents

• Storage & Handling: Store in temperature- and humidity-controlled environments to prevent contamination

2. Compounding Process

• Kneading/Two-Roll Milling: Achieve homogeneous dispersion of additives

• Pre-curing Checks: Test compound viscosity, dispersion, and scorch time

• Batch Labeling: Assign traceable batch IDs for each compounded lot

3. Shaping/Forming

• Molding Options: Compression, transfer, or injection molding based on geometry

• Tool Temperature Control: Maintain mold temperatures between 150°C and 220°C

• Cycle Timing: Optimize press time for full crosslinking

4. Curing Process

• Primary Curing: Molded parts are cured under pressure and heat

• Post-Curing (if needed): Optional secondary curing in an oven (e.g., 200°C for 4 hours) to remove residual volatiles and enhance performance

5. Trimming & Finishing

• Flash Removal: Manual or automated trimming of excess rubber

• Surface Treatments: Optional coatings for friction reduction or hydrophobicity

• Dimension Check: Measure tolerances using calipers or coordinate measuring machines (CMMs)

6. Inspection & Testing

• Physical Testing: Hardness (ASTM D2240), tensile strength (D412), elongation, tear resistance

• Thermal Resistance: Heat aging and cold flexibility tests

• Electrical Properties: For insulation-grade silicone (e.g., dielectric strength per ASTM D149)

7. Packaging & Traceability

• Labeling: Include product code, lot number, and date of manufacture

• Packaging: Use moisture- and dust-resistant bags or cartons

• Documentation: Attach CoA, MSDS, and regulatory certificates

8. Quality Assurance

• In-Process Audits

• First Article Inspections

• SPC Monitoring & Corrective Action Logs

Packaging & Shipping

Applications

Ideal Applications of High-Performance Solid Silicone Sealing Strips

High-end solid silicone rubber sealing strips are engineered to deliver exceptional sealing, insulation, and environmental protection across a wide range of demanding construction and industrial applications. Their unmatched durability, elasticity, and weather resistance make them indispensable in both traditional and high-tech building systems.

1. Building Curtain Wall Systems

• Provide long-lasting seals between glass panels and metal frames, preventing water infiltration and air leakage.

• Maintain flexibility across temperature extremes, ensuring structural integrity in high-rise buildings.

2. Aluminum Alloy Doors and Windows

• Ensure airtight and watertight sealing around operable window and door frames.

• Resist deformation and aging under daily use, UV exposure, and seasonal temperature changes.

3. PVC, UPVC, and Wooden Window Frames

• Enhance thermal and acoustic insulation in residential and commercial windows.

• Suitable for both double-glazed and triple-glazed systems, reducing energy loss.

4. Glass Facades, Skylights & Roof Glazing

• Maintain a durable, weatherproof barrier in structural glazing systems exposed to direct sunlight, wind, and rain.

• Ideal for complex geometries and curved installations due to their excellent conformability.

5. Energy-Efficient and Passive Houses

• Essential for thermal bridge reduction and maintaining building envelope integrity.

• Help achieve LEED, BREEAM, or Passive House certification by improving air tightness and energy performance.

6. Cleanrooms and Medical Facilities

• Offer non-toxic, non-reactive sealing in hospitals, pharmaceutical labs, and sterile environments.

• Resistant to microbial growth, chemicals, and regular cleaning agents.

7. Automotive and Rail Vehicle Interiors

• Used in door seals, window channels, and HVAC systems for noise reduction, thermal management, and dust protection.

• Perform reliably under vibration, compression, and outdoor exposure.

8. Electrical and Electronics Enclosures

• Protect sensitive components from moisture, dust, and EMI in outdoor junction boxes or telecom equipment.

• Maintain sealing even under prolonged thermal cycling and electrical loading.

9. Aerospace, Marine & Defense Structures

• Used in access panels, hatches, and fuselage joints requiring low outgassing and extreme weather durability.

• Withstand ozone, salt spray, and corrosive environments, critical in marine and coastal buildings.

10. Industrial Equipment & Machinery

• Serve as gaskets and seals in industrial ovens, cleanroom equipment, HVAC units, and compressors.

• Provide chemical and high-temperature resistance in process-intensive environments.

Summary of Key Benefits Across Applications

• Weatherproofing and air sealing

• Thermal and acoustic insulation

• Long-term elasticity and durability

• Compatibility with diverse substrates (glass, metal, wood, plastic)

• Compliance with green building standards

Certifications

Company Profile

Hangzhou Dachuang Kehua New Materials Co., Ltd. - Pioneering Advanced Silicone Material Solutions

Company Overview

Hangzhou Dachuang Kehua New Materials Co., Ltd. is a leading national high-tech enterprise specializing in the R&D, production, and sales of high-performance silicone materials. Headquartered in the Qingshanhu Science and Technology City in Hangzhou, Zhejiang-an integral part of China's National Science and Technology Innovation Corridor-the company is driven by technological innovation. With a dedicated team of industry experts, Dachuang Kehua has developed a comprehensive platform encompassing R&D, manufacturing, and sales. The company collaborates with top research institutions, establishing joint laboratories that push the boundaries of silicone material applications and industrialization.

Core Strengths

1. Technological Leadership

   • Innovative production processes and equipment, offering a diverse range of products, including liquid/solid foamed silicone, thermal conductive materials, and potting compounds.

   • The revolutionary DC800 Series Liquid Foamed Silicone technology requires no external foaming agents, is eco-friendly, and boasts superior weather resistance, flame retardancy, and rebound performance.

2. Industry-Leading Certifications

   • Quality management systems: ISO9001, IATF16949 (automotive industry standard).

   • Global certifications: UL/CUL UL157, EU RoHS 2.0, REACH, and SGS comprehensive testing.

3. Tailored Solutions for Diverse Industries
   Products are designed to meet the needs of high-end industries such as new energy vehicles, energy storage, 5G communications, and aerospace, providing sealing, thermal conduction, cushioning, and fireproofing solutions.

Product Portfolio & Innovative Applications

1. Key Products

• Foamed Silicone: DC800 Series (low/medium/high density), DC900 Series (rigid foam), featuring IP68 sealing, shock absorption, sound insulation, and extreme temperature resistance (-55°C to 200°C).

• Thermal Conductive Materials: DC10 Series thermal pads, DC21 Series potting compounds, ideal for lightweighting and heat dissipation in battery packs.

• Fireproof Materials: DC400 Series ceramicized silicone rubber, designed for thermal runaway protection.

• Specialty Composites: DC600 Series (foamed silicone + PTFE), offering resistance to corrosion and chemicals.

2. Industry Applications

• New Energy Vehicles:

  • Power battery PACK sealing (IP68), liquid cooling plate support, cell cushioning (absorbing expansion stress).

  • Charging pile waterproofing/dustproofing (IP68), pouch cell spacers.

• Energy Storage Systems: Liquid-cooled cabinet sealing (IP67), cell fireproofing/insulation (ceramicized silicone).

• 5G Communications: Equipment housing sealing, EMI shielding, and aging resistance.

• Construction & Industry: Steel structure sealing strips, photovoltaic inverters (IP67, UL94 V-0 flame retardant).

R&D & Quality Assurance

• Laboratory Capabilities:

  • Over 30 performance tests, including mechanical properties, aging, salt spray, flammability, and electrical testing.

  • Advanced equipment: Universal tensile testers, thermal conductivity meters, environmental chambers, and more.

• Manufacturing Process: Fully automated mixing, vulcanization, cutting, and laminating processes ensure consistent product quality.

Market Reach & Clients

Dachuang Kehua serves global leaders in new energy vehicles (batteries, charging piles), energy storage, rail transit, and consumer electronics, providing high-performance material solutions to industry giants such as CATL, BYD, and Huawei.

Mission & Vision

With the mission of "Empowering Industrial Upgrades Through Material Science," Dachuang Kehua is committed to continuous innovation, aiming to establish itself as a global leader in silicone materials and contribute to the sustainable development of green energy and smart manufacturing.