Crommelin Hybrid MS Polyurethane Flexible Sealant 300ml
Take on interior and exterior sealing with a professional grade hybrid MS polyurethane. This single component sealant delivers a flexible, durable seal on common building substrates and is suitable for a wide range of construction and maintenance tasks.
Key benefits
- Very low VOC and isocyanate free
- UV resistant for long term outdoor performance
- High flexibility to accommodate joint movement
- Excellent adhesion on properly prepared porous and non porous surfaces
- Easy to gun, tool and clean up
Typical applications
- Construction and expansion joints
- Perimeter sealing around windows and doors
- Roofing and cladding laps, flashings and penetrations
- General gap sealing in wet and dry areas
Suitable substrates
- Concrete, masonry, brick and render
- Timber and fibre cement
- Metals and coated metals
- Many plastics* and glass
*Always pre test for compatibility and adhesion.
Surface preparation
- Surfaces must be clean, dry, sound and free of dust, oil, release agents and loose material.
- Remove old sealant and contaminants. Abrade dense or glossy surfaces if required.
- Use suitable primer if specified for difficult or highly porous substrates.
- Mask edges for neat joints and install closed cell backing rod where needed to control joint depth.
Application
- Cut nozzle to required bead size and load cartridge into a quality caulking gun.
- Gun a continuous bead into the joint ensuring full contact with sides and backing.
- Tool off with a moistened spatula for a smooth finish before skin forms.
- Protect from water and disturbance during initial cure.
Clean up
- Clean tools and fresh spills promptly.
- Once cured, remove by mechanical means.
Good to know
- Low odour formulation suitable for indoor use with ventilation.
- Paintable with many water based coatings once skinned and cured. Always test first.
- Store upright in a cool, dry place. Keep out of direct sunlight.
Safety
- Wear suitable gloves and eye protection.
- Avoid contact with skin and eyes. If contact occurs, rinse with clean water.
- Refer to the product Safety Data Sheet for full precautions.
What’s in the box
- 1 x 300ml cartridge
- 1 x application nozzle
