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

1. Cut nozzle to required bead size and load cartridge into a quality caulking gun.
2. Gun a continuous bead into the joint ensuring full contact with sides and backing.
3. Tool off with a moistened spatula for a smooth finish before skin forms.
4. 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