FIREFLYMastic and FIREFLYMastic BG (Brush Grade) are water-based acrylic sealants used within FIREFLY passive fire protection systems.

FIREFLYMastic provides a practical solution for sealing penetrations, linear gaps and joints, while FIREFLYMastic BG offers a brush-applied option for sealing batt joints, substrate interfaces and exposed system edges.

Used across a broad range of passive fire protection applications, the FIREFLYMastic range provides flexible sealing options for service penetrations, joints and perimeter sealing. The two application formats allow the range to be incorporated across a variety of FIREFLY fire protection systems.

Available in 400 mL and 600 mL sausages and 5 L Brush Grade tubs.