Description
Arbothane 1245 Polyurethane Sealant – 600ml Foils
Arbothane 1245 Polyurethane Sealant is a high-performance, one-component moisture-curing sealant designed to deliver exceptional durability, flexibility, and long-term weather resistance. Upon exposure to atmospheric moisture, it cures to form a tough yet flexible rubber seal, making it ideal for demanding construction and industrial sealing applications.
Supplied in 600ml foil packs, Arbothane 1245 is perfect for floor joints, façade sealing, expansion joints, curtain walling, and perimeter sealing around doors and windows. Its excellent movement accommodation ensures lasting performance even in areas subject to vibration and thermal movement.
Read our guide Arbothane 1245 Adhesive: High-Performance Properties, Uses & Application Guide for an in-depth analysis.
✅ Key Features & Benefits
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Single-Component System – Ready to use with no mixing required
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Moisture-Cured – Reacts with atmospheric moisture for reliable curing
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High Durability – Excellent resistance to weathering, UV radiation & ageing
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Flexible Rubber Seal – Accommodates joint movement for long service life
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Professional Grade Performance – Suitable for demanding construction use
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Easy Application – Compatible with standard foil sealant guns
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600ml Foil Format – Ideal for larger joints and continuous sealing runs
🏗 Typical Applications
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Concrete & masonry structures
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Precast concrete panels
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Curtain walling systems
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Expansion joints in floors & walls
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Door & window perimeter sealing
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Industrial and commercial construction joints
✅ Polyurethane vs Silicone Sealant – Which Should You Choose?
Arbothane 1245 Polyurethane Sealant is ideal when you need a paintable, high-strength, flexible joint seal with excellent movement capability and long-term durability.
| Feature | Polyurethane Sealant (Arbothane 1245) | Silicone Sealant |
|---|---|---|
| Paintable | ✅ Yes | ❌ No |
| Strength & Abrasion Resistance | ✅ Very High | ⚠️ Medium |
| Flexibility | ✅ Excellent | ✅ Excellent |
| Weather & UV Resistance | ✅ Excellent | ✅ Excellent |
| Movement Accommodation | ✅ High | ✅ High |
| Use on Concrete & Masonry | ✅ Ideal | ⚠️ Limited |
| Long-Term Outdoor Durability | ✅ Excellent | ✅ Excellent |
| Resistance to Oils & Chemicals | ⚠️ Moderate | ✅ Very Good |
✅ Choose Polyurethane Sealant When You Need:
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A paintable seal
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High mechanical strength
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Excellent adhesion to concrete, masonry & metal
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Durable expansion joint sealing
✅ Choose Silicone Sealant When You Need:
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Maximum chemical resistance
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Non-paintable glazing or sanitary sealing
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High flexibility with lower abrasion demands
📊 Technical Specifications
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Cure Mechanism: Moisture curing
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Form: One-component polyurethane sealant
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Final Cure: Tough, flexible rubber
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Movement Accommodation: Designed for moving joints
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Weather & UV Resistance: Excellent
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Packaging Size: 600ml Foils
🛠 Application Instructions
Surface Preparation:
Ensure all surfaces are clean, dry, and free from dust, oil, grease, and loose debris.
Application:
Apply using a suitable 600ml foil sealant gun, ensuring the joint is fully filled.
Tooling:
Tool the sealant before skin formation to ensure good adhesion and a neat finish.
Curing:
Allow to cure in line with manufacturer’s guidelines, depending on temperature and humidity.
Find out more about Arbo Sealants with our guide:
The Complete Guide to ARBO Sealants UK: MP20, HM, Arbomast GP & More
