| Customization: | Available |
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| Material: | Organic Silicone |
| Application: | Household, Medical, Industrial, Agricultural |
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Premium silicone rubber sealing strips are high-performance solutions designed specifically for modern construction needs. Produced using advanced high-temperature vulcanization (HTV) technology, these strips outperform conventional seals in durability, functionality, and long-term reliability.
Compared to ordinary rubber or plastic seals, silicone rubber strips deliver exceptional performance:
Wide Temperature Tolerance - Remain flexible and effective from extreme cold up to temperatures exceeding 200°C.
Outstanding Weather Resistance - Withstand UV rays, ozone, and prolonged outdoor exposure without degrading.
Superior Aging Resistance - Retain elasticity and sealing ability for years, resisting brittleness, cracking, and hardening even under sunlight and air.
Safe & Environmentally Friendly - Non-toxic and chemically inert, suitable for green buildings and indoor environments.
Breathable & Insulating - Help reduce moisture buildup while offering excellent thermal and acoustic insulation.
Low Density & High Yield - Lightweight material provides more linear meters per kilogram, optimizing efficiency and reducing project costs.
Excellent Elastic Recovery - Maintains a tight seal and recovers effectively even after repeated compression and stress.
Highly Formable - Easily molded into precise, complex profiles to fit diverse architectural designs and systems.
These premium sealing strips are widely used in a variety of construction contexts, including:
Building curtain walls
Aluminum, PVC, or wooden doors and windows
Glass facades and skylights
Energy-efficient and passive house projects
Whether in residential, commercial, or high-rise buildings, silicone rubber sealing strips provide long-lasting protection against air, water, noise, and dust - improving energy efficiency, indoor comfort, and the overall durability of the building.
Wide Temperature Resistance
Reliable performance across a broad temperature range of -60°C to +200°C, ensuring functionality in both extreme cold and heat.
Outstanding Weather & UV Resistance
Withstands prolonged exposure to sunlight, ozone, and rain without cracking, degrading, or losing elasticity.
Superior Aging & Durability
Retains shape and sealing performance over time with minimal compression set and excellent long-term resilience.
Non-Toxic & Environmentally Friendly
Free of harmful substances; safe for green buildings, indoor spaces, 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 form after compression, ensuring a tight, reliable seal over repeated use.
Controlled Breathability & Moisture Management
Allows for optimal air permeability, preventing condensation and enhancing thermal and acoustic insulation.
Chemical Resistance
Resistant to oils, solvents, acids, and alkalis - ideal for industrial, coastal, and harsh environments.
Customizable Profiles & Colors
Easily molded or extruded into diverse shapes and sizes, with custom colors available to complement architectural designs.
Optional Fire Resistance
Can be formulated to meet UL94 V-0 or other flame-retardant standards, making it suitable for high-safety building applications.
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
Pioneering Advanced Silicone Material Solutions
Hangzhou Dachuang Kehua New Materials Co., Ltd. is a national high-tech enterprise specializing in the research, development, production, and sales of high-performance silicone materials.
Situated in Qingshanhu Science and Technology City, Hangzhou - a key hub within China's National Science and Technology Innovation Corridor - the company thrives on technological innovation and deep industry expertise.
With a skilled team and strong collaborations with leading research institutions, Dachuang Kehua has established a comprehensive platform that integrates R&D, manufacturing, and sales. State-of-the-art laboratories and advanced facilities enable the company to continuously expand the applications and industrialization of silicone materials.
Proprietary production processes and cutting-edge equipment produce a wide range of products, including liquid and solid foamed silicone, thermal conductive materials, potting compounds, and more.
The innovative DC800 Series Liquid Foamed Silicone technology is environmentally friendly, free of external foaming agents, and delivers excellent weather resistance, flame retardancy, and elasticity.
Quality management systems: ISO9001, IATF16949 (automotive standard).
International product certifications: UL/CUL UL157, EU RoHS 2.0, REACH, with comprehensive testing by SGS.
Dachuang Kehua provides customized material solutions for demanding sectors such as new energy vehicles, energy storage, 5G communications, and aerospace - delivering reliable sealing, thermal management, cushioning, and fire protection.
Foamed Silicone:
DC800 Series (low/medium/high density) and DC900 Series (rigid foam) offering 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, efficient heat dissipation in battery systems.
Fireproof Materials:
DC400 Series ceramicized silicone rubber for thermal runaway mitigation and fire protection.
Specialty Composites:
DC600 Series combines foamed silicone and PTFE for exceptional chemical and corrosion resistance.
New Energy Vehicles:
Power battery PACK sealing (IP68), liquid cooling plate supports, cell cushioning, and waterproof/dustproof solutions for charging stations.
Energy Storage Systems:
Liquid-cooled cabinet sealing (IP67) and ceramicized silicone for fireproofing and insulation.
5G Communications:
Housing seals, EMI shielding, and superior aging resistance.
Construction & Industrial:
Steel structure seals, photovoltaic inverter gaskets (IP67, UL94 V-0 flame retardant).
Over 30 testing methods, including mechanical, aging, salt spray, flammability, and electrical performance tests.
Advanced equipment such as universal tensile testers, thermal conductivity meters, and environmental chambers.
Fully automated production processes - from mixing and vulcanization to cutting and laminating - ensure consistency, efficiency, and superior product quality.
Dachuang Kehua proudly collaborates with global leaders in new energy vehicles, energy storage, rail transit, and consumer electronics - serving esteemed clients such as CATL, BYD, and Huawei with dependable, high-performance materials.
Guided by the mission:
"Empowering Industrial Upgrades Through Material Science,"
Dachuang Kehua is dedicated 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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