FIREFLY® Span
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USE AREAS
Engineered for sealing linear joints in floors, walls, and curtain wall perimeters. It accommodates structural movement while maintaining fire resistance, making it suitable for various construction applications such as:
Linear joints in walls and floors
Perimeter joints around curtain wall systems
Expansion and movement joints
Construction joints requiring fire resistance and acoustic insulation
Interfaces between different building elements
CONSTRUCTION
FIREFLY® Span is composed of a flexible, open-celled polyurethane foam impregnated with fire-retardant chemicals and bonded with intumescent graphite layers. The foam core provides flexibility and movement capability, while the intumescent material expands under heat to create a robust fire seal. The product is supplied in pre-cut lengths, allowing easy handling and installation.
KEY BENEFITS
Provides up to 60 minutes fire resistance, tested to BS EN 1366-4
Expands under heat to form a fire-resistant barrier
High compressibility and recovery properties
Excellent acoustic properties
Simple installation without the need for adhesives or mechanical fixings
Resistant to moisture, aging, and environmental conditions
Can be used in conjunction with other fire protection systems
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