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Price Per Unit: $13.85
Price Per Box: $12.47
PU 50 FC: High-Strength Polyurethane Adhesive Sealant
PU 50 FC is a high-performance, single-component polyurethane adhesive sealant engineered for tough industrial and commercial construction tasks. With superior tensile and tear strength, it creates durable bonds that flex with structural movement. PU 50 FC cures by atmospheric moisture, forms a flexible yet hard-wearing seal, and performs under exposure to UV, vibration, chemicals, and temperature shifts. It adheres strongly to concrete, metal, timber, fibreglass, and painted surfaces—ideal for load-bearing joints, precast panels, facades, civil works, and more.
Key Features & Specifications
- Exceptional tensile strength for heavy-duty bonding
- Flexible seal accommodates vibration and joint movement
- Resists water, chemicals, UV exposure, and mechanical stress
- Single-component formula – easy to apply, no mixing required
- Adheres to a wide range of construction materials
- Paintable and non-sag – suitable for vertical and horizontal joints
Why Choose PU 50 FC?
- Designed for structural sealing and bonding in high-load zones
- Performs in vibration-prone or movement-heavy environments
- Trusted for civil works, bridge joints, metal fabrication, and facade systems
- Low VOC, compliant with building codes and safety standards
Best Practices: Do's & Don'ts
Do
- Apply to clean, dry, and sound substrates
- Use Primer 2001 or Primer 50A for best bond on porous or metal surfaces
- Tool before skinning to ensure full contact and smooth finish
Don't
- Don’t apply in standing water or to frozen surfaces
- Don’t overpaint before full cure
- Don’t use without a backer rod or bond breaker in deep joints
Trade Use Cases: Applied in the Field
Engineer: Bridge Expansion Joint Sealing
The Problem
Joint sealant in a bridge deck must tolerate traffic load, movement, and water ingress.
The Solution
PU 50 FC applied with foam backer rod provided a flexible, heavy-duty seal that withstands vibration and moisture.
Best Practice
Allow full cure before subjecting to traffic. Use bond breaker tape to prevent three-sided adhesion.
Fabricator: Securing Metal Frame Panels
The Problem
High-strength adhesive required for bonding aluminium frames to composite panels.
The Solution
PU 50 FC used for its non-sag formula and outstanding tensile performance.
Best Practice
Degrease metal surfaces thoroughly. Use Primer 50A for best results.
Frequently Asked Questions
What is the main difference between PU 25 FC and PU 50 FC?
PU 50 FC has significantly higher tensile strength and is designed for heavy-duty bonding and structural sealing applications. PU 25 FC is more suited for general joint sealing with moderate flexibility needs.
Can PU 50 FC be used for structural adhesive bonding?
Yes. PU 50 FC is a high-strength polyurethane adhesive sealant suitable for bonding structural elements including metal frames, panels, and precast components.
Is PU 50 FC UV-resistant?
Yes, PU 50 FC is UV-stable and can be used in both exposed and sheltered external environments without yellowing or degradation.
Can I paint over PU 50 FC?
PU 50 FC is paintable with most water-based coatings. However, always test compatibility before full application. Avoid using solvent-based paints without a primer layer.
What’s the curing time for PU 50 FC?
Skin time is typically 60–90 minutes at 25°C and 50% RH, with full cure achieved in 5–7 days depending on joint depth and ambient conditions.
Applications & Benefits
| Application / Use Case | Key Benefit | Primary Trades |
|---|---|---|
| Structural bonding of precast concrete and façade panels | High tensile and shear strength for load-bearing assemblies | Engineers, Concrete Contractors |
| Sealing and bonding metal fabrication components | Flexible seal resists vibration and dynamic movement | Fabricators, Sheet Metal Workers |
| Civil engineering joints and infrastructure sealant | Long-term weather, UV, and chemical resistance | Civil Contractors, Bridge Crews |
| Sealing of vertical and overhead expansion joints | Non-sag formula ideal for difficult orientations | Commercial Builders, Façade Installers |
| Adhesive for cladding and architectural panel fixing | Adheres to aluminium, fibre cement, and painted substrates | Architectural Cladders, Installers |
| Vehicle, trailer, and container fabrication | Flexible bond accommodates movement during transit | Manufacturers, Automotive Technicians |
How to Apply PU 50 FC: Step-by-Step
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1. Prepare Substrates
Clean and dry all bonding surfaces. Remove dust, oil, release agents, and surface contaminants. Abrade smooth surfaces for better mechanical grip.
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2. Apply Primer (if needed)
Use Primer 2001 for porous materials like concrete. Use Primer 50A for metals, painted surfaces, and plastics. Allow primer to dry fully before sealant application.
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3. Mask & Back
Apply masking tape for clean edges. Insert backer rod or bond breaker tape into joints to prevent three-sided adhesion and control joint depth.
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4. Apply PU 50 FC
Cut nozzle to suit joint width. Using a caulking gun, extrude PU 50 FC into the joint or bonding surface. Ensure full contact and avoid air entrapment.
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5. Tool Smooth
Tool the sealant within 10–15 minutes using a spatula or sealant finishing tool. A mild soapy solution may be used for tooling in exposed joints.
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6. Clean Up
Remove masking tape before skinning. Clean tools and excess uncured material with an approved solvent. Once cured, mechanical removal is required.
Limitations & Safety
Product Limitations
Do not apply to wet, frozen, or contaminated surfaces.
Not suitable for continuous immersion in water or aggressive chemicals.
Avoid contact with bitumen, natural rubber, or plasticised PVC without testing.
Safety & Handling Guidelines
Personal Protective Equipment
Wear suitable gloves, safety glasses, and protective clothing during application.
Ventilation
Ensure adequate ventilation when working in enclosed or confined areas.
Storage & Disposal
Store in a cool, dry place below 25°C. Keep containers sealed. Dispose of product and packaging in accordance with local regulations.
First Aid Measures
Eye Contact:
Flush with water for 15 minutes. Seek medical attention if irritation persists.
Skin Contact:
Wipe off and wash with soap and water. Remove contaminated clothing.
Inhalation:
Move to fresh air. If symptoms occur, seek medical advice.
Ingestion:
Do not induce vomiting. Rinse mouth. Seek immediate medical attention.
Refer to the PU 50 FC Safety Data Sheet (SDS) for full safety information.
PU 50 FC Substrate Compatibility & Surface Preparation
Concrete & Precast Panels
Surface Preparation
Remove laitance, dust, and moisture. Mechanically abrade if necessary.
Primer Recommended
Use Primer 2001 for optimum adhesion, especially on porous substrates.
Aluminium & Painted Metal
Surface Preparation
Degrease and lightly abrade for mechanical key. Wipe with solvent.
Use Primer 50A
Promotes adhesion to smooth or coated surfaces.
Timber (Hardwood, Softwood)
Surface Preparation
Ensure dry and dust-free. Sand glossy coatings before application.
Primer Optional
For high-moisture or treated wood, perform adhesion testing first.
Fibreglass & Plastics
Surface Preparation
Clean with isopropyl alcohol. Light abrasion recommended for glossy or gel-coated surfaces.
Use Primer 50A
Ensures long-term adhesion and chemical resistance on non-porous substrates.
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