| Customization: | Available |
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| Material: | Organic Silicone |
| Application: | Household, Medical, Industrial, Agricultural |
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Premium Silicone Rubber Sealing Strips for Construction Doors & Windows
Engineered for superior performance in modern construction, our premium silicone rubber sealing strips are manufactured using advanced high-temperature vulcanization (HTV) technology. These high-quality seals outperform traditional rubber and plastic alternatives, delivering unmatched durability, functionality, and long-term reliability.
Extreme Temperature Resistance - Maintains flexibility and sealing integrity in freezing cold or scorching heat (up to 200°C+).
Superior Weather & UV Resistance - Withstands prolonged sun exposure, ozone, and harsh outdoor conditions without cracking or degrading.
Long-Lasting Elasticity - Resists hardening, brittleness, and deformation over time, ensuring a durable seal for years.
Eco-Friendly & Non-Toxic - Safe for green building projects and indoor applications, free from harmful chemicals.
Thermal & Acoustic Insulation - Enhances energy efficiency by reducing heat transfer, noise infiltration, and moisture buildup.
Lightweight & Cost-Effective - High yield per kilogram reduces material waste and installation costs.
Customizable Profiles - Easily molded into complex shapes for seamless integration with various architectural designs.
Curtain walls & structural glazing
Aluminum, PVC, and wooden doors/windows
Glass facades, skylights, and partitions
Energy-efficient & passive housing projects
Perfect for residential, commercial, and high-rise buildings, our silicone rubber sealing strips provide a reliable barrier against air, water, dust, and noise-enhancing energy efficiency, indoor comfort, and structural longevity.
Upgrade to premium silicone sealing-where performance meets durability.
Wide Temperature Tolerance
Performs reliably across an extensive temperature range from -60°C to +200°C, maintaining functionality in both extreme cold and heat.
Excellent Weather & UV Resistance
Resists prolonged exposure to sunlight, ozone, rain, and other environmental factors without cracking, degrading, or losing elasticity.
Superior Aging & Longevity
Maintains its shape, elasticity, and sealing performance over time, with minimal compression set and excellent long-term durability.
Non-Toxic & Eco-Friendly
Free from harmful substances, making it safe for green buildings, indoor applications, and environments requiring physiological inertness.
Lightweight & Efficient
Low density with high material yield, reducing production costs and improving extrusion and installation efficiency.
Outstanding Elastic Recovery
Quickly rebounds to its original shape after compression, ensuring a reliable and consistent seal even after repeated use.
Controlled Breathability & Moisture Control
Provides optimal air permeability to prevent condensation while enhancing thermal and acoustic insulation properties.
Excellent Chemical Resistance
Withstands exposure to oils, solvents, acids, and alkalis, making it ideal for industrial, coastal, and harsh environments.
Customizable Designs & Colors
Can be easily molded or extruded into a wide variety of profiles and sizes, with custom colors available to complement architectural aesthetics.
Optional Flame Retardancy
Available in formulations that meet UL94V-0 and other fire safety standards, suitable for high-safety building and industrial 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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