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Product Description Product DescriptionSilicone sealant is a high-performance, flexible sealing material specially designed for long-lasting waterproofing and protection. Ideal for sealing slits, joints, gaps, and cracks, it forms a durable, weather-resistant barrier that prevents moisture, dust, and air penetration in a wide range of applications.Made from advanced silicone polymer, this sealant offers excellent adhesion to glass, metal, ceramic, plastic, concrete, and other common substrates. It remains permanently flexible, withstanding temperature extremes, UV exposure, and aging without cracking or shrinking.Whether used in construction, home repair, automotive, or industrial settings, our silicone sealant ensures reliable waterproof sealing for bathrooms, kitchens, windows, doors, exterior walls, roofing joints, and more. Easy to apply and quick to cure, it delivers professional-grade performance with lasting results.Key Features of Silicone Sealant100% WaterproofForms a strong, watertight seal to block moisture infiltration in all weather conditions.Excellent AdhesionBonds well to a wide range of materials-glass, metal, ceramic, concrete, plastic, wood, and more.Flexible & Crack-ResistantMaintains elasticity over time, accommodating joint movement without cracking or shrinking.UV & Weather ResistantWithstands sunlight, rain, snow, and temperature extremes without degradation or discoloration.Mold & Mildew ResistantIdeal for high-moisture areas such as kitchens, bathrooms, and outdoor joints.Durable & Long-LastingProvides years of reliable sealing performance, even in harsh environments.Fast Curing & Easy ApplicationSimple to apply with a caulking gun; fast skin-over and curing time for quick project completion.Non-Corrosive & SafeNeutral-cure formulas available that do not corrode metal or emit strong odors.Paintable Options AvailableCertain grades can be painted over once cured, ensuring seamless surface integration.Versatile UseSuitable for sealing slits, gaps, joints, cracks, window and door frames, roofing edges, sanitary installations, and more. Silicone Sealant - Technical SpecificationsPropertySpecificationBase MaterialSilicone polymer (RTV - Room Temperature Vulcanizing)AppearanceSmooth, paste-like; available in clear, white, black, gray, etc.Curing MethodAcetoxy cure or Neutral cure (moisture-cure)Skin-Over Time5 - 15 minutes (at 25°C, 50% RH)Full Cure Time24 - 48 hours depending on joint thicknessShore A Hardness20 - 30 (ASTM D2240)Tensile Strength≥ 1.2 MPa (ASTM D412)Elongation at Break≥ 400% (ASTM D412)Movement Capability±25% to ±50% (ASTM C719)Temperature Resistance-50°C to +180°C (continuous)UV ResistanceExcellentWater Resistance100% waterproof (after full cure)AdhesionStrong adhesion to most building materialsPaintabilityNon-paintable (for most acetoxy silicones); special grades availableShelf Life12 - 18 months (unopened, stored below 27°C)Packaging300 mL cartridges / 600 mL sausages / bulk pails Our production Advanced Facilities. Assured Quality. Lasting Partnerships.Dachuang Kehua operates with state-of-the-art manufacturing and testing facilities, powered by the latest silicone technology. Our commitment to quality ensures stable, high-performance products-laying the foundation for long-term, win-win cooperation with our global partners.Silicone sealant production is a highly specialized process that combines advanced chemical formulation, precision equipment, and strict quality control to create versatile, high-performance sealing materials. Silicone sealants are widely used across construction, automotive, electronics, and household applications due to their exceptional weather resistance, flexibility, adhesion, and durability.The production of silicone sealant involves several key stages:Raw Material SelectionThe core ingredient is polysiloxane (silicone polymer), which is blended with fillers, curing agents, adhesion promoters, stabilizers, and pigments. Each ingredient is carefully chosen based on the performance requirements of the final product-whether it's for waterproofing, high-temperature resistance, or structural bonding.Compounding and MixingUsing high-shear mixers and vacuum kneaders, raw materials are uniformly blended under controlled conditions to form a homogeneous compound. This stage is critical for ensuring consistent viscosity, curing behavior, and adhesive strength.Deaeration and FiltrationAir bubbles are removed through vacuum deaeration, and the mixture is filtered to eliminate any impurities or oversized particles, ensuring a smooth, defect-free sealant.Packaging and FillingThe finished silicone sealant is automatically filled into cartridges, sausages, pails, or drums using high-precision filling equipment. Packaging is sealed to prevent premature curing and preserve shelf life.Quality Control and TestingEvery batch undergoes rigorous testing for properties such as tack-free time, curing rate, tensile strength, elongation, adhesion, and durability to meet industry standards like ASTM, ISO, or GB.Labeling and DistributionAfter passing quality checks, the products are labeled and prepared for shipment to construction sites, hardware stores, industrial customers, or OEM clients worldwide.Silicone sealant production requires a deep understanding of polymer chemistry, modern machinery, and safety practices. Leading manufacturers also invest in R&D to innovate eco-friendly, low-VOC, or specialty-grade sealants for demanding environments.Quality control1. Visual InspectionCheck for: color uniformity, smooth texture, absence of air bubbles or foreign particles.Purpose: Immediate quality verification after mixing or packaging.2. Rheological TestsViscosity Test: Measured using a viscometer to ensure proper flow during application.Slump/Sag Test: Evaluates if the sealant holds shape without slumping in vertical joints (ASTM D2202).3. Curing PropertiesTack-Free Time: Time taken for the surface to lose stickiness (ASTM C679).Cure Through Time: How long it takes to cure completely under standard conditions.4. Mechanical Performance TestsTensile Strength & Elongation: Tested using a universal testing machine (ASTM D412 / ISO 37).Peel and Adhesion Strength: Measures bonding strength to substrates like glass, metal, concrete (ASTM C794).Hardness (Shore A): Indicates softness or stiffness of cured sealant (ASTM D2240).5. Durability TestingUV Aging / Weathering: Exposed to artificial sunlight to simulate long-term exposure (ASTM G154).Thermal Aging: Exposed to high/low temperature cycles to test flexibility and adhesion over time.Water Resistance: Checked for swelling, discoloration, or degradation after water immersion.6. Chemical ResistanceTested by applying the sealant to various chemical environments (e.g., acids, alkalis, solvents) to evaluate resistance.How to Keep Silicone Sealant Quality1. Raw Material Quality ControlTest each batch of silicone polymer, fillers, curing agents, etc., for purity and consistency.Use only certified, traceable raw material sources.2. Standardized Production ProcessesUse precise mixing equipment and automated systems to maintain consistent ratios and mixing times.Implement batch tracking and in-process checks during compounding and filling.3. Batch Testing and DocumentationRetain samples from each production lot.Maintain test records, including viscosity, curing, and mechanical results for traceability.4. Proper Storage ConditionsStore sealants in a cool, dry place (usually below 25°C).Protect from direct sunlight and moisture.Monitor shelf life and rotate inventory (FIFO system).5. Employee Training and SOPsTrain workers on standard operating procedures (SOPs), safety, and handling protocols.Conduct regular audits and refresher training.6. Customer Feedback LoopCollect feedback on application performance.Analyze complaints and adjust formulation or processes as needed. Industry Standards to FollowASTM C920 - Standard for elastomeric joint sealantsISO 11600 - Classification for building sealantsUL, ROHS, REACH, GB/T standards (depending on target market)Products applications Packaging & Shipping Proper packaging of silicone sealant is essential to maintain product quality, extend shelf life, and ensure safe transportation. Whether packed in cartridges, sausages, pails, or bulk drums, the packaging process must be precise, clean, and secure. Here is a step-by-step overview of how to properly pack silicone sealant: 1. Choose the Right Packaging TypeCartridges (280ml-300ml): Common for retail and construction applications.Sausages (400ml-600ml): Suitable for high-volume or professional use; minimizes waste.Pails/Drums (5L-200L): For bulk supply to industrial users or OEMs. 2. Prepare the Packing AreaEnsure the packing room is clean, dust-free, and temperature-controlled.Operators should wear gloves, hairnets, and protective clothing to maintain hygiene. 3. Fill the Silicone SealantUse automated filling machines or pneumatic dispensers for consistent volume and reduced air inclusion.Fill each container with the exact quantity specified, avoiding overfill or underfill. 4. Deaeration and SealingApply a vacuum or pressure system to remove trapped air (important for sausages and drums).Heat-seal or mechanically seal the packaging:Cartridges: Seal the bottom and attach the nozzle.Sausages: Seal both ends with aluminum clips or crimping tools.Bulk Containers: Ensure tight-fitting lids and tamper-proof seals. 5. LabelingApply product labels with:Batch numberProduction date and expiry dateGrade, color, and usage instructionsStorage guidelines and safety warnings 6. Cartoning and Outer PackagingPlace individual units (e.g., 24 cartridges or 20 sausages) into corrugated cartons with dividers.For pails or drums, use palletized shipping with corner guards and stretch film. 7. Storage and ShippingStore in a cool, dry warehouse (generally below 25°C).Rotate stock using FIFO (First In, First Out) to prevent product aging.Avoid exposure to direct sunlight, high humidity, and freezing temperatures.Company ProfileDachuang KehuaPioneering Silicone Material Innovations for the FutureAbout UsAt Hangzhou Dachuang Kehua, we are a national high-tech enterprise dedicated to advancing silicone material science. Bringing together a team of elite experts, we integrate R&D, precision manufacturing, and global sales to deliver high-performance solutions for the world's most demanding industries.Our strong partnerships with leading universities and research institutes empower continuous innovation through joint laboratories and advanced development platforms.Core Technologies & Product PortfolioWe engineer next-generation silicone materials tailored for performance-critical applications:Foamed Silicone - Lightweight sealing, impact absorption, and acoustic insulationThermally Conductive Silicone - High-efficiency heat dissipation for electronics and power systemsSilicone Potting Compounds - Reliable protection for sensitive electronic componentsCeramicized High-Temperature Silicone - Fire insulation capable of withstanding 1200°C+Specialty Silicone Adhesives - Advanced bonding solutions with chemical and thermal resistanceQuality & Regulatory ComplianceOur production systems are internationally certified to ensure quality, consistency, and environmental responsibility:IATF 16949 and ISO 9001 certified manufacturingUL/CUL UL157 product certificationsSGS-tested compliance with EU RoHS 2.0 and REACH directivesGlobal Application CoverageOur materials power performance and innovation across diverse industries:Transportation? EV battery packs? Charging infrastructure? Aerospace systems? High-speed rail electronicsEnergy & Infrastructure? Energy storage systems? 5G telecom and base stations? Outdoor electrical enclosures? Power distribution cabinetsIndustrial & Consumer? UAVs & drones? Smart home appliances? HVAC systems? LED lighting and displaysEngineered for High-Performance DemandsOur silicone solutions are built to deliver exceptional functionality where it matters most:? IP68-Rated Sealing - Water, dust, and environmental barrier protection? Thermal Conductivity - Tailored solutions from 1-12 W/m·K? Fire Safety - Certified UL94 V-0 flame retardancy? Durability - Resistance to UV, chemicals, and extreme weather? Precision Protection - Vibration damping, EMI shielding, and structural integrityEmpowering the Future of Mobility, Energy & ConnectivityWith a deep commitment to innovation and performance, Dachuang Kehua helps shape the next generation of sustainable technologies.Partner with Us For:→ Custom material development→ Application-specific validation & testing→ Global engineering support and collaborationLet's solve your toughest material challenges-together.Contact our expert team today. Certified Quality. Global Trust.Dachuang Kehua is IATF 16949 and ISO 9001 certified, with products approved under UL157 and SGS-tested. Fully RoHS 2.0 and REACH compliant, we deliver safe, reliable, and high-performance silicone solutions trusted worldwide.Exhibitions FAQ1. What is silicone sealant used for?Silicone sealant is a flexible, waterproof adhesive commonly used for sealing joints, gaps, and seams in construction, automotive, sanitary, and industrial applications. It adheres well to materials like glass, metal, ceramic, and plastic.2. What surfaces can silicone sealant be applied to?Silicone sealant adheres to a wide range of substrates, including glass, aluminum, steel, tile, plastic (some types), concrete, and wood. For best results, the surface should be clean, dry, and free of grease or dust.3. How long does silicone sealant take to cure?Curing time varies by formula and environmental conditions. Typically, it becomes tack-free within 10-60 minutes and fully cures in 24-72 hours. High-temperature or low-humidity environments may affect curing time.4. Is silicone sealant waterproof?Yes, once cured, silicone sealant forms a durable, waterproof barrier. It's commonly used in kitchens, bathrooms, windows, roofs, and exterior joints.5. Can silicone sealant be painted over?Most silicone sealants are not paintable. If paintability is required, consider using paintable hybrid sealants or select specially formulated paintable silicones.6. How should silicone sealant be stored?Store in a cool, dry place, away from direct sunlight and freezing temperatures. Unopened products typically have a shelf life of 9-12 months. Always follow the manufacturer's storage guidelines.7. What is the difference between acetoxy and neutral silicone sealant?Acetoxy silicone cures quickly and is suitable for non-porous materials like glass and ceramic, but may corrode metals.Neutral silicone is slower curing but offers better adhesion and is safer for metal, concrete, and sensitive materials.8. Can silicone sealant be removed after curing?Yes, but removal requires cutting, scraping, or using a commercial silicone remover. It does not peel off easily once fully cured.9. Is silicone sealant resistant to UV and temperature?Yes, most silicone sealants have excellent UV, ozone, and temperature resistance (typically -50°C to +150°C, some up to 250°C), making them ideal for outdoor and high-heat applications.10. Can silicone sealant be used for structural glazing or curtain walls?Only specially formulated structural silicone sealants should be used for structural glazing. These products are tested for high adhesion, tensile strength, and weather resistance, and usually require certification.

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