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China, Chinese EPDM Sealing Strips: Ultimate Weatherproofing Lock out Rain, Wind & Noise for Year-Round Comfort1 Industrial Products Supplier Manufacturer Details, price list catalog:
China Products Details Supplier Manufacturer price list catalog
Silicone Silicone ProductsWind & Noise for Year-Round ComfortSealing StripsSilicone Strip
Hangzhou Dachuang Kehua New Material Co., Ltd.
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Product Description Product DescriptionEPDM Sealing Strips: Ultimate Weatherproofing - Lock Out Rain, Wind & Noise for Year-Round ComfortEPDM sealing strips are engineered to provide superior protection and long-lasting performance in even the harshest environments. Made from Ethylene Propylene Diene Monomer (EPDM) rubber, these strips offer excellent resistance to UV rays, ozone, extreme temperatures, and weathering.Designed for use in doors, windows, roofing systems, and a variety of construction and automotive applications, EPDM sealing strips form a reliable barrier against rain, wind, dust, and noise, ensuring indoor comfort all year round. Their flexibility and resilience make them easy to install, while their durable composition guarantees long service life without cracking, hardening, or losing elasticity.Whether for residential, commercial, or industrial projects, EPDM sealing strips are the ultimate choice for weatherproofing, soundproofing, and energy efficiency.EPDM Sealing Strips: Ultimate Weatherproofing - Lock Out Rain, Wind & Noise for Year-Round ComfortWhy EPDM Outperforms Conventional SealsMove beyond the limits of standard rubber or plastic. Our high-performance EPDM sealing strips deliver the ultimate balance of durability, flexibility, and weather resistance:All-Weather ResiliencePerform reliably from -40°C to +120°C, maintaining elasticity and sealing integrity in both extreme cold and hot conditions.Superior Weather & UV ResistanceWith excellent resistance to ozone, oxidation, and prolonged sun exposure, EPDM provides decades of service life in harsh outdoor environments.Long-Lasting ElasticitySpecially formulated EPDM resists aging, cracking, and compression set, ensuring a permanent and dependable seal.Eco-Safe & Non-ToxicLow VOC and physiologically inert, EPDM is safe for green building certifications (LEED, BREEAM, Passive House) and for sensitive indoor environments.Noise & Moisture ControlBlocks rain, wind, dust, and noise while reducing condensation and preserving thermal and acoustic comfort. Engineered for Efficiency and AdaptabilityCost-Effective PerformanceHigh durability and long service life reduce replacement needs and overall project costs.Excellent Elastic RecoveryMaintains sealing force through seasonal changes and repeated compression cycles.Flexible Design OptionsAvailable in standard sizes or fully customized profiles, making them suitable for a wide range of building and industrial applications. Ideal ApplicationsCurtain wall systems (unitized + stick-built)High-performance windows & doors (aluminum, PVC, timber)Roofing systems and facade sealingStructural glazing and insulated glassSkylights, atriums, and glass facadesPassive House, net-zero, and airtight buildings A Smart Investment in Building PerformanceChoosing our EPDM sealing strips means securing long-term protection against air, water, dust, and noise. The result: reduced energy costs, enhanced occupant comfort, and a building envelope designed to last. Key Features of Premium EPDM Sealing StripsWide Temperature StabilityPerforms reliably from -50°C to +120°C (and up to +150°C for short periods), making it ideal for both freezing winters and hot summers.Outstanding Weather & UV ResistanceSpecially formulated EPDM rubber resists degradation from sunlight, ozone, rain, and outdoor exposure-no cracking, chalking, or hardening over time.Durability & Long Service LifeExcellent compression set resistance ensures the strip retains elasticity and sealing strength for years, even under repeated compression and movement.Safe & Environmentally FriendlyNon-toxic, halogen-free, and compliant with modern environmental standards-safe for residential, commercial, and industrial projects.Cost-Effective PerformanceHigh material efficiency and long replacement cycles reduce maintenance and lifecycle costs, offering excellent value for large-scale applications.Superior Elastic RecoveryQuickly rebounds to original shape after pressure release, ensuring a consistent, weather-tight seal season after season.Effective Noise & Moisture ControlProvides excellent sound insulation while forming a reliable barrier against rain, wind, dust, and drafts, helping maintain indoor comfort.Excellent Chemical ResistanceWithstands mild acids, alkalis, and automotive fluids-suitable for building construction, automotive, marine, and industrial environments.Versatile Design OptionsAvailable in multiple profiles, thicknesses, and colors, allowing customization to match architectural designs and functional requirements.Optional Flame Retardant GradesCertain formulations comply with international fire safety standards, enhancing safety for high-traffic or public-use buildings.Our Production Production Management WorkflowThis document outlines the end-to-end workflow for manufacturing high-performance EPDM sealing strips, emphasizing quality control, traceability, and efficiency at every stage. EPDM (Ethylene Propylene Diene Monomer) is chosen for its outstanding weather resistance, elasticity, and durability, making it ideal for sealing against rain, wind, dust, and noise. Phase 1: Pre-Production Planning & Formulation1.1 Material Selection & ComplianceBase Polymer: High-quality EPDM rubber.Additives:Vulcanizing Agents (Sulfur, Peroxides)Reinforcing Fillers (Carbon Black, Silica)Specialty Additives: UV stabilizers, anti-ozone agents, flame retardants, pigments.Compliance Verification: All raw materials must comply with relevant standards (RoHS, REACH, UL, automotive or construction-specific regulations).1.2 Compound Development & ManagementTarget Properties: Shore A Hardness, Tensile Strength, Compression Set, Elongation, Weather & Ozone Resistance.Lab Trials: Small-scale R&D tests to optimize curing conditions, hardness range (typically 30-90 Shore A), and sealing performance.Database Management: Maintain secure, version-controlled formulation records for traceability and reproducibility. Phase 2: Production Processing2.1 Mixing & CompoundingEquipment: Internal mixers, open mills, or twin-screw extruders.Process Controls:Accurate dosing of all additives.Uniform dispersion for stable mechanical properties.Cooling and degassing to prevent air entrapment.Monitoring viscosity and curing characteristics.2.2 Extrusion & Profile ShapingProcess: Continuous extrusion into required sealing strip profiles (D-shape, P-shape, hollow tubes, custom designs).Critical Parameters:Extrusion temperature: 80-120 °C (pre-curing).Vulcanization in hot air, salt bath, or microwave curing lines.Profile tolerance control (±0.2 mm typical).2.3 Vulcanization (Curing)Purpose: Crosslinking to enhance elasticity, strength, and weather resistance.Conditions:Temperature: 160-200 °CTime: Profile-dependent (continuous line speed control).Result: Improved long-term durability against UV, ozone, and temperature fluctuations.2.4 Secondary ProcessingCutting & Trimming: Precision cutting to required lengths.Surface Treatments: Adhesive backing (tape lamination) or flocking for low-friction sliding surfaces.Jointing/Splicing: Hot vulcanization or adhesive bonding for closed-loop gaskets. Phase 3: Quality Assurance & Control3.1 In-Process & Final InspectionDimensional Verification: Calipers, optical measurement systems for strict profile tolerances.Mechanical Testing: Hardness (Shore A), tensile/elongation, compression set.Performance Testing:Weather & ozone resistance (ASTM D1171).Heat aging and cold flexibility.Air/water leakage tests for sealing function.3.2 Certification & DocumentationStandards: Production under ISO 9001, IATF 16949 (automotive), or ISO 14001 (environmental).Batch Records:Material Certificates of Conformance (CoC).Extrusion and vulcanization parameter logs.Final QC reports with sealing performance results. Phase 4: Packaging, Storage & LogisticsPackaging: Coiled or straight-cut strips, moisture-protected packaging.Labeling: Clear batch codes, production date, shelf life, and product dimensions.Storage Conditions: Dry, cool environment (<30 °C, <65% RH), away from sunlight and ozone sources. Phase 5: Production Management & Continuous ImprovementTraceability: ERP/MES integration for batch tracking, yield monitoring, and defect analysis.Best Practices:Preventive maintenance of extrusion and curing lines.Standard operating procedures and operator training.Scrap recycling and waste reduction.Root cause analysis for issues such as air bubbles, profile distortion, or poor adhesion.Quality managementQuality Management System for EPDM Sealing StripsA robust Quality Management System (QMS) for EPDM sealing strips is built on precise process control, rigorous testing, and continuous monitoring at every stage of production. This ensures the strips consistently deliver the required performance in weatherproofing, sealing, and long-term durability under demanding environmental conditions.Core Philosophy: Preventative Control & TraceabilityThe priority is to prevent defects rather than simply detect them. Full traceability-from raw polymer batches to finished strips-enables exact process control and rapid issue resolution. 1. Incoming Raw Material ControlQuality starts with carefully verified raw materials:EPDM Rubber Polymer: Certificates of Analysis (CoA) checked for grade, Mooney viscosity, and ethylene-propylene ratio.Fillers & Reinforcing Agents: Particle size, dispersion, and purity confirmed for consistent mechanical properties.Processing Oils & Additives: Verified against specifications for compatibility, UV resistance, and long-term stability.Documentation: All materials must include Material Safety Data Sheets (MSDS) and comply with REACH, RoHS, and other regulations. 2. In-Process Quality Controla) Mixing & CompoundingControl: Accurate management of mixing sequence, temperature, and time for uniform dispersion.Testing: Samples from each batch tested for Mooney Viscosity and cure characteristics.b) Extrusion & Profile FormingProcess Parameters: Continuous monitoring of temperature zones, screw speed, pressure, and line speed.Visual Inspection: Real-time checks for smooth surface, correct dimensions, and absence of voids or cracks.c) Vulcanization (Curing)Control: Precise curing conditions (temperature, pressure, and line speed) to ensure optimal crosslink density.Verification: Uniform hardness, elasticity, and long-term weather resistance confirmed. 3. Finished Product Testing & VerificationTest CategorySpecific TestsPurpose & StandardPhysical PropertiesDensity (ASTM D792)Ensures material consistency Hardness (Shore A, ASTM D2240)Confirms sealing compressibility Compression Set (ASTM D395)Verifies sealing longevityMechanical PropertiesTensile Strength & Elongation (ASTM D412)Confirms strength & flexibility Tear Resistance (ASTM D624)Evaluates resistance to tearingPerformance & DurabilityWeathering (UV, Ozone, ASTM D1149)Ensures long service life outdoors Thermal Aging (ASTM D573)Tests resistance to heat exposure Water AbsorptionConfirms low permeability for waterproofingDimensional ControlLaser/optical measurementVerifies cross-sectional tolerancesMaterial ComplianceFlammability (UL94, ASTM E84)Meets safety requirements Volatile ContentConfirms low emissions for indoor use 4. Certification & ComplianceISO 9001 - Quality Management System certification.ISO 14001 - Environmental Management System certification.Material Certifications - Compliance with UL, automotive (IATF 16949), or construction standards.Performance Certifications - Independent testing per ASTM, AAMA, or EN standards for air/water infiltration and durability. 5. Packaging & DeliveryPackaging: EPDM strips coiled or spooled without distortion; UV- and moisture-protected.Labeling: Clear part number, batch/lot number, production date, and quantity. Summary: Key Supplier QualificationsWhen sourcing EPDM sealing strips, ensure your supplier demonstrates:Documented QMS: ISO 9001 certification with full audit trail.Traceability: Batch-level monitoring of raw materials and process parameters.Comprehensive Test Data: Compression set, hardness, tensile, and weathering results provided.Process Control Expertise: Proven capability in compounding, extrusion, and curing.Consistency: Minimal batch-to-batch variation for reliable sealing performance.Packaging & ShippingProduct applicationsPremium EPDM (Ethylene Propylene Diene Monomer) rubber sealing strips deliver outstanding performance in weatherproofing, environmental protection, and thermal/acoustic insulation. With exceptional durability, elasticity, and resistance to UV, ozone, and extreme temperatures, EPDM strips are essential for reliable sealing across construction, transportation, and industrial applications.Key Application AreasBuilding Curtain Wall SystemsForm long-lasting seals between glass panels and aluminum framesPrevent air leakage and water penetration in high-rise buildingsMaintain flexibility in hot summers and freezing wintersAluminum Alloy Doors and WindowsEnsure airtight and watertight sealing around operable framesWithstand UV exposure, daily operation, and seasonal changesPVC, UPVC & Wooden Window FramesImprove insulation against heat, cold, and outdoor noiseSuitable for double- and triple-glazed systems to reduce energy lossGlass Facades, Skylights & Roof GlazingDeliver durable, weatherproof barriers in structural glazing systemsAdapt easily to curved or complex architectural designsEnergy-Efficient & Passive HousesEnhance building envelope airtightness and reduce thermal bridgesSupport certifications such as LEED, BREEAM, and Passive HouseCleanrooms & Medical FacilitiesProvide non-toxic, low-emission sealing for sterile environmentsResist microbial growth and withstand frequent cleaning protocolsAutomotive & Rail Vehicle InteriorsUsed in door seals, window channels, and HVAC systemsProvide vibration-resistant sealing, noise reduction, and dust controlElectrical & Electronics EnclosuresShield sensitive components from moisture, dust, and EMIEnsure reliable performance under thermal and electrical stressAerospace, Marine & Defense ApplicationsApplied in hatches, access panels, and structural jointsWithstand ozone, salt spray, and corrosive operating conditionsIndustrial Equipment & MachineryFunction as gaskets and seals in HVAC units, compressors, and ovensDeliver chemical resistance and stability under high temperatures Summary of Key BenefitsOutstanding weatherproofing against rain, wind, and dustExcellent thermal and acoustic insulation for comfort and efficiencyLong-lasting elasticity, UV, and ozone resistanceWide compatibility with glass, metal, wood, and plastic substratesSupport for green building and energy-saving standardsCertificationsCompany ProfileHangzhou Dachuang Kehua New Materials Co., Ltd.Innovating the Future with Advanced Silicone SolutionsHeadquarters: Qingshanhu Science and Technology City, Hangzhou, ChinaWho We AreHangzhou Dachuang Kehua New Materials Co., Ltd. is a premier national high-tech enterprise leading the advancement of silicone material innovation. We specialize in the research, development, and manufacturing of cutting-edge silicone solutions that empower the world's most advanced industries. Strategically located within China's National Science and Technology Innovation Corridor, our operations are driven by a culture of relentless R&D and collaboration with leading academic institutions.Our Core StrengthsPioneering Technology: We develop proprietary materials and processes, including our revolutionary DC800 Series Liquid Foamed Silicone, which sets new industry standards for performance and environmental safety.Uncompromising Quality: Our commitment to excellence is validated by stringent international certifications, including IATF 16949 for automotive quality, ISO 9001, and compliance with UL, RoHS, REACH, and SGS standards.Application-Driven Engineering: We deliver tailored solutions. Our expert team collaborates closely with clients to address complex challenges in sealing, thermal management, and fire protection.Advanced Product PortfolioOur products are engineered for peak performance in demanding environments:Foamed Silicone ProductsDC800 Series: Eco-friendly, self-foaming silicone rubber offering exceptional density options, IP68 sealing, and resilience across extreme temperatures (-55°C to 200°C). Ideal for shock absorption and sound insulation.DC900 Series (Rigid Foam): Provides structural integrity and superior protection where rigid cushioning is required.Thermal Management SolutionsDC10 Series Thermal Pads & DC21 Series Potting Compounds: High-performance materials designed for efficient heat dissipation in compact spaces, critical for electric vehicle battery packs and power electronics.Fire Safety & ProtectionDC400 Series Ceramicized Silicone Rubber: A breakthrough in passive fire protection. Under extreme heat, this material forms a protective ceramic layer to insulate and prevent thermal runaway in battery systems.High-Performance CompositesDC600 Series (Silicone + PTFE): Combines the flexibility of silicone with the exceptional chemical and corrosion resistance of PTFE for challenging industrial environments.Strategic Industry ApplicationsWe are the material partner of choice for innovators in:New Energy Vehicles (NEV): Battery pack sealing (IP68), cell cushioning, cooling plate support, and charging pile waterproofing.Energy Storage Systems (ESS): Cabinet sealing (IP67), fireproofing barriers, and thermal insulation for large-scale battery storage.5G Communications & Electronics: EMI shielding, environmental sealing, and durable protection for sensitive equipment.Green Infrastructure: Sealing solutions for photovoltaic systems and industrial construction meeting UL94 V-0 flame retardancy standards.Quality & Precision ManufacturingOur state-of-the-art facilities feature:Advanced R&D Labs: Equipped with universal tensile testers, thermal conductivity analyzers, and environmental chambers for over 30 performance tests.Automated Production Lines: Fully integrated processes from mixing to laminating ensure unparalleled consistency, efficiency, and scale. FAQQ1: What are the primary applications of EPDM sealing strips?A: EPDM sealing strips are engineered for durable weatherproofing, soundproofing, and dust sealing. They are widely used in:Building & Construction: Doors, windows, curtain walls, roofing systems, and skylights.Automotive: Door seals, trunk linings, window channels, and engine compartments.Industrial & Transportation: Train and ship seals, machinery enclosures, HVAC systems, and electrical housings. Q2: Why choose EPDM over PVC or other rubber seals?A: EPDM delivers reliable performance with key advantages:Excellent weather resistance - protects against rain, wind, and noiseOutstanding UV and ozone resistance - no cracking or fading in outdoor useBroad temperature resistance (-40°C to +120°C, short peaks to +150°C)Long-term elasticity and compression set resistanceCost-effective and proven for year-round comfort Q3: Can I request custom-designed EPDM sealing strips?A: Yes. We offer:Custom profiles, sizes, and hardness (Shore A)Options including co-extrusion, adhesive backing, and flame-retardant gradesTailored solutions for architectural, automotive, and industrial applications Q4: Are EPDM sealing strips easy to install?A: Absolutely. They can be:Cut and fitted easily into grooves or channelsBonded with adhesives or installed with pre-applied PSA backingMounted quickly without requiring specialized tools Q5: Do EPDM sealing strips perform well in extreme environments?A: Yes. EPDM is designed to handle:Sunlight, heavy rain, and humidity without degradationFreezing cold and high heat while maintaining flexibilityMild chemical exposure in industrial applications Q6: Are EPDM strips environmentally friendly?A: Yes. They are:Non-toxic and halogen-freeCompliant with RoHS, REACH, and green building standardsA safe, sustainable choice for residential and industrial projects Q7: Which industries use EPDM sealing strips?A: Key sectors include:Construction - doors, windows, facades, roofingAutomotive - weather seals for EVs and traditional vehiclesTransportation - trains, ships, buses, aviationIndustrial - machinery, electrical enclosures, HVAC systems Q8: What is the typical service life of EPDM sealing strips?A: When properly installed, EPDM sealing strips typically last 8-15 years, delivering strong performance at a cost-effective price point.
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