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SikaSeal-128 280ml | Multipurpose neutral silicone sealant. Product Category: Silicone Sealant Brand: Sika Model Code: SikaSeal®-128 Description SikaSeal®-128 is a 1-component neutral silicone sealant, non-corrosive and suitable for indoor and outdoor applications. It is designed for multipurpose joint sealing and weatherproofing across a wide range of construction materials. Applications Weatherproof joint sealing Window and door installation Tile perimeter joints General construction sealing Suitable substrates: Glass Metals Aluminium Painted surfaces Wood Ceramic tiles Key Features Excellent UV and weather resistance Primerless adhesion to many substrates High elasticity and flexibility Neutral curing (low odor) Non-corrosive formulation Product Information Type: Neutral silicone sealant Composition: Neutral silicone Packaging ~330 g cartridge (clear) ~460 g cartridge (basic colors) ~600 g cartridge (clear) ~900 g cartridge (basic colors) Colours White Clear Grey Black Others on request Shelf Life 12 months Storage Store upside down Dry conditions Temperature below +27°C Protect from sunlight Density Basic colors: 1.45 – 1.55 kg/L Clear: 0.95 – 1.05 kg/L Technical Data Mechanical Properties Shore A Hardness: 30–50 (basic colors) 20–30 (clear) Tensile Strength: ~1.0 MPa (basic colors) ~0.5 MPa (clear) Elastic Recovery: >80% Elongation at Break: ≥250% (basic colors) ≥200% (clear) Movement & Temperature Movement Capability: ±25% (basic colors) ±20% (clear) Service Temperature: -40°C to +150°C Consumption Guide (300 ml) Width Depth Length 6 mm 4 mm ~12.5 m 9 mm 5 mm ~6.5 m 12 mm 6 mm ~4 m 20 mm 10 mm ~1.5 m Application Conditions Air temperature: +5°C to +40°C Substrate temperature: +5°C to +40°C ≥3°C above dew point Performance Curing Rate: ~3 mm / 24 hrs Skin Time: ~15 minutes (basic colors) ~5 minutes (clear) Joint Design Recommended width: 10–20 mm Recommended depth: 10 mm Surface Preparation Surface must be: Clean Dry Sound Free from oil, grease, dust Primer / Treatment Normally no primer required For high-performance applications: Non-porous → Aktivator-205 Metals → Aktivator-205 + Primer-3 N PVC → Primer-215 Glass → clean with isopropanol Porous → Primer-3 N Application Method Apply masking tape (optional) Insert backing rod Prime if required Apply sealant with gun Ensure full contact with joint sides Avoid air entrapment Tool immediately Remove tape within skin time Cleaning Tools → Sika® Remover-208 Skin → Cleaning wipes Limitations / Restrictions Do NOT use: On concrete, plaster, masonry (alkaline surfaces) On natural stone, marble, granite On bituminous or rubber materials In swimming pools Under water pressure or immersion In confined spaces without airflow For structural glazing For food / medical use Notes Cannot be painted Colour variation possible (aesthetic only) Performance Advantages Strong adhesion without primer Flexible and durable sealing Resistant to UV, weather, and temperature Wide material compatibility Safety & Handling Follow SDS guidelines Store in original sealed packaging Additional Notes Lab-tested data Site conditions may vary Local regulations may differ Summary SikaSeal®-128 is a high-performance neutral silicone sealant ideal for multi-purpose sealing, offering excellent flexibility, UV resistance, and strong adhesion, making it suitable for both indoor and outdoor construction applications.

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