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Silicone Weatherproof Sealant Aging Stability Filler¹

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Product Description Silicone Weatherproof Sealant aging stability filler DC800 Silicone Weatherproof Sealant is a premium-grade, one-component, neutral cure silicone specifically engineered for professional joint sealing and waterproofing applications. Designed to cure at room temperature upon contact with moisture in the air, it transforms into a durable and highly elastic rubber body that delivers long-lasting sealing performance.With its excellent weather resistance, DC 800 provides outstanding protection against UV radiation, ozone, rain, snow, and extreme temperature fluctuations, ensuring reliable performance in even the harshest outdoor environments. Its superior elasticity allows it to accommodate up to ±35% joint movement, making it ideal for sealing expansion joints and construction gaps that are subject to thermal expansion, vibration, or structural shifting..Key features and benefits1.Neutral Cure Formulation – Non-Corrosive to Metals and Sensitive Materials .DC800 uses a neutral curing system, which eliminates the release of corrosive by-products during curing. This makes it safe for use on delicate surfaces such as aluminum, coated glass, galvanized steel, and electronic enclosures, ensuring long-term material integrity without risk of damage.2.Strong Adhesion to a Wide Range of Construction Substrates Without Primer. . Designed for versatility, LL800 bonds effectively to most common building materials, including glass, concrete, stone, ceramics, aluminum, steel, wood, and plastics. In most cases, no primer is required, which reduces preparation time and labor costs while ensuring a reliable, lasting seal.3.Excellent Flexibility and Movement Capability for Dynamic JointsWith the ability to accommodate up to ±35% joint movement, LL800 is ideal for sealing areas that are subject to thermal expansion, structural vibration, or mechanical stress. Its high elasticity prevents cracking, splitting, or bond failure, maintaining consistent sealing performance over time.4.Superior Weatherproofing Against Moisture, Dust, and Air LeakageLL800 creates a tough, watertight seal that blocks water penetration, prevents air leakage, and resists dust ingress. It delivers dependable protection in harsh environments, such as heavy rain, coastal humidity, desert dust, or urban pollution. This ensures that buildings and equipment remain secure and energy efficient.5.Easy-to-Apply, One-Component System for Fast and Efficient InstallationPackaged as a ready-to-use, single-component sealant, LL800 requires no mixing or special preparation. It can be applied directly from the cartridge or drum with standard caulking equipment, saving installation time while ensuring smooth and uniform application for both professionals and DIY users.6.Long Service Life with Minimal Maintenance RequirementsEngineered for durability, LL800 maintains its elasticity, adhesion, and protective properties for years without cracking, shrinking, or hardening. Its long-lasting performance reduces the need for frequent resealing, lowering maintenance costs and providing peace of mind for building owners and engineers. While production materialshowshowTechnical Specifications(Custom configurations available upon request.) ITEMSSPECIFICATION( TYPICAL)TEST/NOTESChemistry / TypeOne-component, neutral-cure RTV silicone (non-corrosive)Oxime/alkoxy system; cures with ambient moistureAppearanceNon-sag pasteSuitable for vertical and overhead jointsColorsWhite, Black, Grey (custom colors available)—Specific Gravity1.30 ± 0.05 g/cm3ASTM D1475Skin-Over Time10–25 min @ 23 °C, 50% RHASTM C679Tack-Free Time30–60 min @ 23 °C, 50% RHFinger touch methodCure Rate≈ 2–3 mm / 24 h @ 23 °C, 50% RHBead depth dependentShore A Hardness30 (typ. 25–35) after 7 daysASTM C661Tensile Strength≥ 1.2 MPa (typ. 0.9–1.5 MPa)ASTM D412 / C1135Elongation at Break≥ 400% (typ. 350–550%)ASTM D412Modulus @100%0.3–0.5 MPaASTM C1135Joint Movement Capability±35%As designed for weathersealsAdhesionStrong, primerless adhesion to glass, anodized aluminum, coated metal, concrete, stone, ceramics, woodPrimer may be needed for porous, oily, or low-surface-energy plastics (PE/PP/PTFE)Service Temperature–50 °C to +150 °C (short peaks to +180 °C)After full cureApplication Temperature+5 °C to +40 °CSubstrate clean and dryWeather/UV/Ozone ResistanceExcellentExterior gradeWater ResistanceExcellent (not recommended for continuous immersion)—Chemical ResistanceGood to dilute acids/alkalis and salts; not for strong solvents—VOCLow-VOC (typ. < 100 g/L)Region-dependentShelf Life12 months (unopened at 5–25 °C, dry)Store away from heat/moisturePackaging300 mL cartridge, 600 mL sausage, bulk pail/drumOther sizes on requestIntended Standards*Designed to comply with ASTM C920 (Type S, Grade NS, Class 35, Uses NT/A/G/M/O), ISO 11600 25LM*Compliance subject to project-specifiProduction activitiesStrictly controlled processing1. Raw Material SelectionManufacturing begins with the meticulous selection of high-performance raw materials tailored to the specific application. The primary base—polysiloxane (silicone)—is precisely formulated with fillers, curing agents, adhesion promoters, stabilizers, and pigments. Each additive is chosen to impart targeted properties such as superior waterproofing, exceptional thermal stability, or high structural bonding strength.2. Compounding & MixingState-of-the-art equipment, including high-shear mixers and vacuum kneaders, is used to compound the materials under tightly controlled temperature and humidity conditions. This process ensures a homogenous blend with stable viscosity, predictable curing behavior, and consistently high adhesive performance.3. Deaeration & FiltrationThe compounded material undergoes vacuum deaeration to remove entrapped air, preventing voids in the final product. It is then passed through precision filtration systems to eliminate contaminants and oversized particles, resulting in a smooth, defect-free sealant optimized for demanding applications.4. Packaging & FillingThe finished sealant is filled into cartridges, foil sausages, pails, or drums using automated dispensing systems that deliver accurate volume control and airtight sealing. This prevents premature curing, extends shelf life, and ensures ease of use during application.5. Quality Control & TestingEvery production batch is subjected to rigorous quality checks in accordance with ASTM, ISO, or GB standards. Key tests include:Tack-free time measurementCure rate evaluationTensile strength testingElongation performanceAdhesion to various substratesLong-term durability assessmentThese evaluations verify batch-to-batch consistency, performance reliability, and compliance with customer and industry specifications.6. Labeling & DistributionApproved batches are labeled with detailed product and batch information, including barcodes for complete traceability. Products are securely packaged and shipped worldwide to OEMs, industrial facilities, construction sites, and hardware suppliers, supported by full quality documentation and reliable logistics networks.Quality control 1. Raw Material InspectionSilicone polymer: Check viscosity, hydroxyl content, and molecular weight.Fillers (silica, calcium carbonate, pigments): Verify particle size, surface treatment, moisture, and chemical compatibility.Additives: Confirm correct amounts of adhesion promoters, curing agents, and stabilizers.Tests: FTIR for polymer identity, laser diffraction for fillers, moisture analysis for hydrophilic fillers.2. Filler Dispersion & CompatibilityEnsure uniform dispersion for mechanical performance and aging stability.Tests: Microscopy to detect clumps, rheology for consistent flow, settling test for sedimentation.3. Physical Properties Before CuringCheck viscosity, flow, sag resistance, and thixotropy to prevent settling or uneven application.4. Curing & CrosslinkingEnsure fillers do not affect curing.Tests: Measure cure time, Shore A hardness, and tack-free time.5. Accelerated Aging TestsSimulate environmental conditions:Heat aging: 70-150°C for 168-500 hoursUV exposure: ASTM G154Humidity: 95% RH at 40°C for 7-28 daysFreeze-thaw: -40°C to 80°CEvaluate: Appearance, mechanical properties, adhesion, dimensional stability.6. Chemical StabilityEnsure fillers do not react with silicone or additives.Tests: pH measurement, blooming/migration test, FTIR or TGA for decomposition.7. Shelf-Life & StorageMonitor viscosity and curing behavior. Detect phase separation or sedimentation.8. Documentation & Batch ControlRecord lot numbers, filler types, mixing ratios, and QC results.Use statistical process control (SPC) to track dispersion and aging performance.Packaging & ShippingProperly packingTimely deliveryProper 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.ApplicationsCompany ProfileSilicone Expert-Dachuang KehuaIntroduction to Services Offered by Dachuang Kehua New Materials Technology Co., Ltd.Dachuang Kehua New Materials Technology Co., Ltd. is a leading manufacturer and comprehensive solutions provider specializing in advanced silicone materials. Backed by deep expertise in material science and precision engineering, we deliver a wide range of services designed to meet the highest standards of sealing, insulation, protection, and cushioning across diverse industries. Our commitment to innovation, quality, and customization enables us to support complex and high-performance applications in even the most demanding environments.Our Core Services Include:Custom Silicone Foam SolutionsProduction of closed-cell and open-cell silicone foam products tailored for sealing, cushioning, thermal insulation, and environmental protection—available in sheets, rolls, gaskets, and custom die-cut formats.Solid Silicone Rubber ManufacturingPrecision-molded solid silicone components with superior mechanical strength and resistance to weather, temperature, and chemicals—ideal for industrial, automotive, and medical use.Gel and Soft Silicone EngineeringSoft, resilient silicone gels and pads designed for electronics thermal management, medical-grade cushioning, and impact protection applications.Semi-Fluid and Potting SiliconeFlowable silicone formulations for encapsulation, potting, and bonding—offering reliable insulation, moisture protection, and heat dissipation.Adhesive-Backed Silicone Tapes and PadsSilicone sponge and foam products laminated with high-performance adhesives for easy application and secure, long-lasting sealing.Die-Cutting and CNC Precision ProcessingCustom fabrication of complex parts such as gaskets, pads, and thermal interface materials using advanced die-cutting, CNC machining, and laser cutting technologies.Flame-Retardant and Specialty GradesDevelopment of silicone materials that meet specific industry and regulatory standards, including flame-retardant, low outgassing, FDA-compliant, and electrically insulating grades.R&D and Custom Formulation ServicesCollaborative development of tailor-made silicone formulations to meet unique project requirements—from material design to product testing and final validation.Why Choose Us?Other ProductsOEM/ODM capabilitiesCompetitive pricing & bulk discountsFast shipping & customs clearance supportTurnkey project solutionsWheel LoadersBulldozersMotor GradersRoad RollersForkliftsFAQQ1: What types of silicone sealants do you provide?A: We offer waterproof silicone sealants enhanced with aging stability fillers for superior UV, temperature, and moisture resistance. Formulations include neutral-cure, acetoxy, and high-performance variants for outdoor and industrial use.Q2: Can your sealants be customized?A: Yes. We can customize filler type, particle size, viscosity, curing speed, elasticity, adhesion, and packaging to meet specific environmental or mechanical requirements.Q3: Do your sealants comply with international standards?A: Yes. Our products meet ASTM C920, ISO 11600, EN 15651, UL94 V-0, REACH, and RoHS standards.Q4: What are the typical applications?A: Applications include construction joints, window and door frames, roofing, fa?ades, industrial equipment, marine and outdoor structures, HVAC systems, and LED housings.Q5: Do you provide processing services?A: Yes. We offer extrusion, die-cutting, cartridge filling, and multilayer lamination for ready-to-use sealants and gaskets.Q6: What is the lead time for orders?A: Standard orders take 5–7 business days; custom formulations require 7–15 days. Expedited production is available on request.Q7: Can I request samples before ordering?A: Yes. Free samples are provided for testing, including aging stability and weatherproof performance evaluation.Q8: How do you handle quality issues or complaints?A: We follow a 4-step resolution process:Sample collection within 48 hoursLab analysis within 5 working daysTechnical assessment on-site if neededResolution or replacement within 30 days

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