The Professional's Standard Acetate Silicone Sealant
Engineered by OTTO-CHEMIE, OTTOSEAL® S 105 is the premium acetate-curing silicone sealant designed for professional glazing, window construction, and general trade sealing. It delivers outstanding weathering, aging, and UV resistance, ensuring durable joints even under harsh Irish weather conditions. Long-lasting results that your clients will appreciate for years.
🇩🇪 Premium German Quality
☀️ UV & Weather Resistant
🚚 Fast Irish Trade Delivery
👷♂️ The Master Tiler's Verdict
"When you need a reliable, fast-skinning acetate silicone for bathroom expansion joints, tile corners, or general sealing, S 105 is the industry standard. It tools brilliantly and offers extreme resistance to mould and weathering."
Pro Tip: Because this is an acetate-curing silicone, ensure your workspace is well-ventilated during application. For best adhesion on porous substrates, always use the recommended OTTO primer beforehand.
Why the Professionals Choose OTTOSEAL S 105
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Excellent Weathering & UV Resistance: Will not crack, yellow, or degrade under harsh environmental exposure, making it ideal for outdoor and indoor applications.
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High Aging Resistance: Maintains its high-performance elasticity and bond strength over decades.
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Fungicidal Properties: Contains active ingredients to resist mold and fungus growth, ensuring a clean finish over time.
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Broad Compatibility: Perfectly suited for sealing glass blocks, copalite glass, and general glazing or tiling applications.
Technical Specifications
| Curing System |
Acetate cross-linking |
| Skin-Forming Time |
Approx. 10 minutes (at 23°C/50% RH) |
| Curing Rate |
Approx. 2-3 mm per 24 hours |
| Application Temperature |
+5 °C to +35 °C |
| Temperature Resistance |
-40 °C to +180 °C |
Safety & Technical Documentation
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