FIREFLYSpan is generally used to provide small fire rated linear gap seals of infinite length which need to accommodate a lot of movement, for example: Seismic/Control Joints and Soft Construction Joints. Simply Choose the thickness of the Span that you require, compress it, push it into the gap then release so that it expands to fill the gap. Butt up the next length of FIREFLYSpan to it and continue along to fill the full length of the gap. Cut to length at floor junctions as you go using a long bladed Stanley knife, until all of the gaps are completely sealed.
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