WEBER PU FLOW 110 | Polyurethane-Based Cold-Applied Horizontal Joint Sealant
Weber PU Flow 110
As defined in the technical data sheet, Weber PU Flow 110 is a polyurethane-based, two-component, chemically curing joint sealant enhanced with coal tar additives. It is designed for heavy-duty and high-traffic conditions, offers UV resistance, and is specifically formulated for horizontal applications. The product features a self-leveling consistency and excellent resistance to dynamic joint movements, making it ideal for outdoor horizontal joints where practical and reliable performance is required.
Advantages
- Suitable for heavy-duty service and high-traffic environments
- Self-leveling consistency for easy application on horizontal surfaces
- Very high abrasion resistance and adhesion strength
- Resistant to dynamic movements
- Superior adhesion in asphalt-to-concrete and asphalt-to-asphalt joints
- Resistant to fuels, oils, and chemicals
- UV-resistant for outdoor applications
These advantages make the product particularly suitable for areas exposed to intense traffic, harsh weather conditions, and chemical exposure.
Areas of Use
- Parking areas, cargo terminals, bridges, and roadways
- Expansion joints requiring high flexibility
- Asphalt-to-concrete and asphalt-to-asphalt joints
- Crack repair and joint sealing in horizontal surfaces
Thanks to its polyurethane binder, the product provides a durable and flexible seal capable of accommodating movement in horizontal joints.
Suitable Substrates
- Bare concrete
- Cement-based renders and screeds
- Metal
- Asphalt
For other substrates, consultation with the manufacturer's technical support team is recommended before application.
Joint Design and Surface Preparation
Joint Width and Depth
- Joint width must be at least four times the anticipated movement and not less than 4 mm.
Recommended sealant depths:
- Up to 15 mm width: sealant depth = joint width
- 15–25 mm width: sealant depth = 80% of joint width
- Greater than 25 mm width: sealant depth = 25 mm
Surface Preparation
- Joints must be clean, dry, free from oil, and free from old sealant residues.
- Damaged edges should be repaired and external corners rounded.
- A backer rod or backing material (closed-cell polyethylene foam) should be installed.
Primer Application
- Priming the joint surfaces with weber.prim PU is recommended before applying Weber PU Flow 110.
Application Conditions
- Surface and ambient temperature: +5°C to +30°C
- Do not apply on damp surfaces, under extremely hot conditions, or where there is a risk of freezing.
Application Procedure
Mixing
- Mix Component A for 2–3 minutes using a low-speed mixer.
- Add Component B and continue mixing for an additional 3–5 minutes.
- Ensure a homogeneous mixture is obtained.
- Avoid entrapping air during mixing.
Sealant Application
- Pour the material into the joint without leaving voids or apply using a spatula.
- Smooth the surface using a spatula as required.
- Tools and equipment should be cleaned with synthetic thinner before the material hardens.
Consumption and Theoretical Joint Lengths
| Joint Width | Joint Depth | Theoretical Joint Length per 1 kg |
|---|
| 5 mm | 10 mm | 13.3 m |
| 10 mm | 10 mm | 3.3 m |
| 15 mm | 15 mm | 1.4 m |
| 20 mm | 20 mm | 0.8 m |
| 25 mm | 25 mm | 0.5 m |
Consumption values are theoretical and may vary depending on joint geometry, surface condition, and backer rod installation.
Technical Specifications
| Property | Value |
| Base Polymer | Two-component polyurethane |
| Solid Content | 100% |
| Movement Capability (Expansion/Contraction) | 50% |
| Elongation at Break | >750% |
| Density (A+B) | 1.50 ± 0.10 g/cm³ |
| Hardness | Shore A 20 ± 5 |
| Elastic Recovery | >96% |
| Penetration | 0.5 mm |
| Pot Life | 1 hour |
| Tack-Free Time | 12 hours |
| Opening to Light Pedestrian Traffic | 24 hours |
| Opening to Heavy Traffic | 48 hours |
| Development of Chemical Resistance | 4 days |
| Packaging | 12.5 kg metal bucket |
| Color | Black |
Storage and Shelf Life
- Store in a dry, moisture-free environment at 10–25°C.
- Keep in the original packaging and in closed storage facilities.
- Shelf life: 1 year.
- Reseal the container tightly after use.
- Protect packaging from freezing conditions.
Warnings and Safety Information
- Ensure the mixture is homogeneous and free of entrapped air.
- Not suitable for joints narrower than 4 mm.
- Do not apply to dirty, oily, bitumen-contaminated, or wet joints.
- Prevent contact with water before the material has fully cured.
Safety Precautions
- Wear appropriate gloves, safety goggles, and a protective mask during application.
- Avoid contact with eyes and skin.
- In case of eye contact, rinse thoroughly with plenty of water and seek medical attention.
Frequently Asked Questions
What types of joints is Weber PU Flow 110 used for?
It is designed for horizontal joints in heavy-duty and high-traffic environments such as parking areas, cargo terminals, bridges, and roadways.
What is the minimum joint width?
The joint width must be at least four times the anticipated movement and not less than 4 mm.
When can the area be opened to traffic?
- Light pedestrian traffic: 24 hours
- Heavy traffic: 48 hours
- Full chemical resistance: 4 days
Is the product UV resistant?
Yes. Its UV-resistant formulation makes it suitable for outdoor applications.
Is a primer required?
Yes. Priming horizontal surfaces—and vertical surfaces where necessary—with weber.prim PU is recommended before application.