Bostik Pro PU91 Polyurethane Construction Sealant 300ml - Grey

Name: Bostik Pro PU91 Polyurethane Construction Sealant 300ml - Grey
Brand: Bostik
SKU: dabsyf4m7d
Price: 8.90 GBP
Availability: InStock

Professional grade polyurethane sealant for construction joints subject to high movement. This gre...

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Product Information

Full details

This guide is for professionals needing a high-performance sealant for construction joints. Bostik Pro PU91 provides exceptional elasticity and movement capability, making it ideal for high-traffic areas and joints subject to significant movement. While it offers excellent durability, proper surface preparation is crucial for optimal adhesion.

All features

Colour	Grey
Brand	Bostik

Extended Product Information

FAQs

What surfaces can I use Bostik Pro PU91 on?

It is suitable for use on concrete, masonry, wood, and many other common construction materials. Always test for compatibility.

Do I need a primer?

No, Bostik Pro PU91 is primer-free, simplifying the application process.

How much movement can the sealant accommodate?

It can accommodate up to 25% movement.

What is the shelf life of the product?

Check the product packaging for the specific shelf life. Store in a cool, dry place.

Can I paint over the sealant?

Yes, once the sealant is fully cured, it can be painted. Test paint compatibility first.

How do I clean up the sealant?

Uncured sealant can be cleaned with a solvent cleaner. Cured sealant may require mechanical removal.

Is the sealant suitable for outdoor use?

Yes, it is suitable for both interior and exterior applications and is weather-resistant.

Troubleshooting

Sealant not adhering properly.

Ensure the surface is clean, dry, and free of contaminants. Roughening the surface may improve adhesion.

Sealant is bubbling during application.

Ensure the application nozzle is not cut too small. Apply at a consistent rate to avoid air entrapment. Check the shelf life of the product.

Sealant is not curing.

Verify the product is within its shelf life. Ensure adequate ventilation and proper temperature for curing.

Difficulty in tooling the sealant.

Apply the sealant at a consistent rate. Tool the sealant within the recommended working time, use a tooling agent if necessary.

Pros and Cons

Pros

Exceptional flexibility to accommodate joint movement.
Suitable for both interior and exterior applications.
Easy to apply, primer-free formula.
Provides a durable and weather-resistant seal.
Excellent for high-traffic areas and challenging conditions.
High modulus formula offers robust performance.

Cons

Requires proper surface preparation for optimal adhesion.
May require specific application tools.
Limited color options.
Potentially slower curing time compared to some alternatives.
May not be suitable for all types of materials.
Shelf life should be considered for unused product.

Setup, Compatibility & Care

Surface Preparation: Ensure the surfaces are clean, dry, and free from loose particles, dust, oil, and grease. Use a suitable cleaner if needed.
Application: Apply using a standard caulking gun. Cut the nozzle to the desired bead size.
Tooling: Tool the sealant within the recommended working time to achieve a smooth finish.
Compatibility: Compatible with a wide range of construction materials. Always test for compatibility before large-scale application.
Curing: Allow the sealant to cure completely according to the product specifications. This can vary based on temperature and humidity.
Storage: Store in a cool, dry place. Avoid extreme temperatures. Keep the product sealed when not in use.
Cleaning: Clean up uncured sealant with a solvent cleaner suitable for polyurethane products. Once cured, removal is more difficult and may require mechanical methods.