WEBER PS FLOW 211 | Polysulfide-Based Cold-Applied Non-Sag Sealant for Vertical Joints
Weber PS Flow 211
According to the technical data sheet, Weber PS Flow 211 is a polysulfide-based, two-component, chemically curing, elastomeric joint sealant with high adhesion strength and suitability for heavy-duty traffic conditions. The product is specifically designed for inclined, vertical, and overhead joints and features a non-sag formulation capable of accommodating permanent joint movement.
Its cold-applied, two-component formulation allows safe and effective application in vertical, sloped, and overhead joint configurations.
Advantages
- Suitable for heavy-duty and high-traffic environments
- Non-sag consistency for use on vertical and overhead surfaces
- High adhesion strength
- Resistant to static and dynamic joint movements
- Excellent chemical resistance
These benefits make the product suitable for reliable use in both interior and exterior applications.
Areas of Use
- Inclined, vertical, and overhead joints
- Applications exposed to water immersion and chemical attack
- Highways, parking areas, and secondary roads
- Bridge connections, stadiums, and industrial floors
- Sidewalks and fuel stations
- Roadways and concrete surfaces in petrochemical and industrial facilities
The product can be used in all vertical joint applications in both indoor and outdoor environments.
Suitable Substrates
- Bare concrete
- Cement-based renders and screeds
- Metal
- Asphalt
For other substrates, consultation with the manufacturer’s technical support team is recommended.
Joint Design and Surface Preparation
Joint Width and Depth
- Joint width must be at least four times the anticipated movement and not less than 6 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 of 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) must be installed.
Primer Application
- Both horizontal and vertical joint surfaces should be primed with weber.prim PS before sealant application.
Application Conditions
- Surface and ambient temperature: +5°C to +30°C
- Do not apply on damp surfaces, in excessively hot conditions, or where freezing conditions may occur.
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.
- Do not use material that has exceeded its pot life.
Sealant Application
- Fill the mixed material into a caulking gun or apply using a spatula.
- Place the sealant into the joint over the backing material without leaving voids.
- Finish and smooth the surface using a spatula.
Cleaning
- All tools should be cleaned with synthetic thinner before the sealant hardens.
Consumption and Theoretical Joint Lengths
| Joint Width | Joint Depth | Theoretical Joint Length per 1 kg |
|---|
| 5 mm | 10 mm | 11.7 m |
| 10 mm | 10 mm | 2.9 m |
| 15 mm | 15 mm | 1.3 m |
| 20 mm | 20 mm | 0.7 m |
| 25 mm | 25 mm | 0.5 m |
Consumption values are theoretical and may vary depending on joint geometry, surface condition, and backer rod placement.
Technical Specifications
| Property | Value |
| Base Polymer | Two-component polysulfide |
| Solid Content | 100% |
| Movement Capability (Expansion/Contraction) | 50% |
| Elongation at Break | >500% (ASTM D 412 Die B) |
| Density (A+B) | 1.70 ± 0.10 g/cm³ |
| Hardness | Shore A 20 ± 5 |
| Elastic Recovery | >85% |
| Penetration | 0.6 mm |
| Pot Life | 1 hour |
| Tack-Free Time | 8 hours |
| Opening to Light Pedestrian Traffic | 24 hours |
| Opening to Heavy Traffic | 48 hours |
| Chemical Resistance Development | 48 hours |
| Packaging | 12.5 kg metal bucket |
| Color | Gray |
Storage and Shelf Life
- Store in a dry, moisture-free environment at 10–25°C.
- Keep in the original, unopened packaging.
- Shelf life: 1 year.
- Store in a closed warehouse and 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 6 mm.
- Do not apply to dirty, oily, bitumen-contaminated, or wet joints.
- Avoid contact with water before the material has fully cured.
Safety Precautions
- Wear protective gloves, goggles, and a suitable mask during application.
- Avoid contact with eyes and skin.
- In case of eye contact, rinse thoroughly with plenty of water and seek medical advice.
Frequently Asked Questions
What types of joints is Weber PS Flow 211 designed for?
It is specifically designed for inclined, vertical, and overhead joint applications.
Can it be used in heavy traffic areas?
Yes. It is suitable for heavy-duty service and high-traffic conditions.
Is it suitable for underwater applications?
Yes. It can be used in applications that will be exposed to continuous water immersion.
What is the minimum joint width?
The joint width must be at least four times the anticipated movement and not less than 6 mm.
What is the recommended application temperature?
The product should be applied at temperatures between +5°C and +30°C.
How long does it take before the area can be opened to traffic?
- Light pedestrian traffic: 24 hours
- Heavy traffic: 48 hours