| Customization: | Available |
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| Material: | Organic Silicone |
| Application: | Household, Medical, Industrial, Agricultural |
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High-end silicone rubber sealing strips are premium, high-performance components designed specifically for construction applications. Produced using high-temperature vulcanization (HTV) processes, these strips significantly outperform conventional door and window seals in durability, functionality, and reliability.
Compared to traditional rubber or plastic sealing materials, silicone rubber sealing strips offer exceptional benefits:
Outstanding Temperature Resistance: Remain flexible and effective across a wide temperature range, from sub-zero conditions up to over 200°C.
Superior Weatherability: Excellent resistance to UV radiation, ozone, and long-term weather exposure ensures reliable performance in harsh outdoor environments.
Aging and Degradation Resistance: Maintain elasticity and sealing function over time without becoming brittle or cracked, even after prolonged exposure to sunlight and air.
Non-Toxic and Inert: Safe for use in environments with strict health and environmental standards - ideal for green buildings and indoor applications.
Breathability: Helps reduce moisture buildup while preserving thermal insulation and soundproofing performance.
Low Density & High Yield: Delivers more linear meters per kilogram, optimizing material efficiency and reducing costs in large-scale projects.
Excellent Elastic Recovery: Retains tight sealing and rebound capabilities even under repeated compression and stress.
Versatile Formability: Easily manufactured into complex, precise profiles that integrate seamlessly with a variety of architectural designs and systems.
High-end silicone rubber sealing strips are widely used across diverse construction scenarios, including:
Building curtain wall systems
Aluminum alloy doors and windows
PVC and wooden window frames
Glass facades and skylights
Energy-efficient and passive house installations
Whether in residential, commercial, or high-rise projects, these sealing strips deliver long-lasting protection against air, water, noise, and dust infiltration - enhancing energy efficiency, indoor comfort, and building longevity.
Wide Temperature Resistance
Performs reliably in temperatures ranging from -60°C to +200°C, ensuring functionality in extreme cold or heat.
Excellent Weather & UV Resistance
Withstands long-term exposure to sunlight, ozone, and rain without degradation, cracking, or loss of elasticity.
Superior Aging and Durability
Maintains shape and sealing effectiveness over time, with minimal compression set and excellent long-term resilience.
Non-Toxic & Environmentally Friendly
Free from harmful substances; safe for green buildings, indoor environments, and applications requiring physiological inertness.
Low Density & High Extrusion Efficiency
Lightweight with high material yield, reducing production costs and improving installation efficiency.
Excellent Elastic Recovery
Quickly returns to its original shape after compression, ensuring a tight and lasting seal.
Good Air Permeability & Moisture Management
Allows for controlled breathability, preventing condensation and enhancing insulation performance.
Chemical Resistance
Resists oils, solvents, acids, and alkalis, making it suitable for industrial and coastal environments.
Customizable Profiles & Colors
Easily molded or extruded into various shapes and sizes; available in custom colors to match architectural aesthetics.
Fire Resistance (Optional Grades)
Can be formulated to meet UL94 V-0 or other flame-retardant standards, suitable for high-safety buildings.
Solid Silicone Production Management Workflow
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
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
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
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)
Secondary heat treatment (e.g., 4 hrs at 200°C) to enhance:
Crosslinking density
Thermal stability
Volatile removal (critical for medical/food-grade)
Cutting/Trimming: Die-cutting, CNC, laser, or waterjet
Surface Treatments: Plasma coating, adhesive lamination
Assembly: Bonding with metals/plastics (for multi-material parts)
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
Anti-static or vacuum-sealed packaging
Labeling: Batch #, manufacture date, shelf life
Storage: <30°C, 50% RH, away from direct sunlight
Records: Batch logs, QC reports, material certificates
ERP/MES Integration: Real-time tracking of production KPIs (yield rate, scrap rate)
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
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:
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
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
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
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
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)
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)
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
In-Process Audits
First Article Inspections
SPC Monitoring & Corrective Action Logs
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.
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.
Ensure airtight and watertight sealing around operable window and door frames.
Resist deformation and aging under daily use, UV exposure, and seasonal temperature changes.
Enhance thermal and acoustic insulation in residential and commercial windows.
Suitable for both double-glazed and triple-glazed systems, reducing energy loss.
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.
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.
Offer non-toxic, non-reactive sealing in hospitals, pharmaceutical labs, and sterile environments.
Resistant to microbial growth, chemicals, and regular cleaning agents.
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.
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.
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.
Serve as gaskets and seals in industrial ovens, cleanroom equipment, HVAC units, and compressors.
Provide chemical and high-temperature resistance in process-intensive environments.
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
Hangzhou Dachuang Kehua New Materials Co., Ltd. is a national high-tech enterprise at the forefront of research, development, production, and sales of high-performance silicone materials.
Located in Qingshanhu Science and Technology City, Hangzhou, within China's National Science and Technology Innovation Corridor, the company thrives on technological innovation and industry expertise.
With a dedicated team and close collaborations with leading research institutions, Dachuang Kehua has built a comprehensive platform integrating R&D, manufacturing, and sales. Joint laboratories and cutting-edge facilities enable the company to continuously expand the boundaries of silicone material applications and industrialization.
Proprietary production processes and advanced equipment delivering a wide range of products: liquid/solid foamed silicone, thermal conductive materials, potting compounds, and more.
The innovative DC800 Series Liquid Foamed Silicone technology is eco-friendly, requires no external foaming agents, and delivers superior weather resistance, flame retardancy, and elasticity.
Certified quality systems: ISO9001, IATF16949 (automotive standard).
International product certifications: UL/CUL UL157, EU RoHS 2.0, REACH, and comprehensive testing by SGS.
Dachuang Kehua provides highly customized solutions for demanding industries such as new energy vehicles, energy storage, 5G communications, and aerospace, offering reliable sealing, thermal management, cushioning, and fireproofing.
Foamed Silicone:
DC800 Series (low/medium/high density) and DC900 Series (rigid foam), delivering IP68 sealing, shock absorption, sound insulation, and extreme temperature resistance (-55°C to 200°C).
Thermal Conductive Materials:
DC10 Series thermal pads and DC21 Series potting compounds for lightweight heat dissipation in battery systems.
Fireproof Materials:
DC400 Series ceramicized silicone rubber for thermal runaway and fire protection.
Specialty Composites:
DC600 Series combines foamed silicone and PTFE for outstanding chemical and corrosion resistance.
New Energy Vehicles:
Power battery PACK sealing (IP68), liquid cooling plate supports, cell cushioning, and charging pile waterproof/dustproof solutions.
Energy Storage Systems:
Liquid-cooled cabinet sealing (IP67) and ceramicized silicone for fireproofing and insulation.
5G Communications:
Housing seals, EMI shielding, and long-term aging resistance.
Construction & Industrial:
Steel structure seals, photovoltaic inverter gaskets (IP67, UL94 V-0 flame retardant).
More than 30 types of performance tests, including mechanical, aging, salt spray, flammability, and electrical evaluations.
Advanced equipment such as universal tensile testers, thermal conductivity meters, and environmental chambers.
Fully automated processes - mixing, vulcanization, cutting, and laminating - ensure consistent quality and efficiency.
Dachuang Kehua proudly partners with global leaders in new energy vehicles, energy storage, rail transit, and consumer electronics, serving clients such as CATL, BYD, and Huawei with reliable, high-performance material solutions.
Guided by the mission "Empowering Industrial Upgrades Through Material Science," Dachuang Kehua is committed to continuous innovation and excellence, striving to become a global leader in silicone materials and a driving force in the sustainable development of green energy and smart manufacturing.
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