General description The TIMCO Fill & Fix Fire Rated Expanding PU Foam B1 is a premium quality, fire-resistant polyurethane-based expanding foam designed for superior performance in various fire-critical applications. Its complex cell structure enhances its effectiveness, making it an ideal choice for sealing and insulating in environments where fire safety is a priority. Technical specifications Volume: 750 ml Type: Polyurethane-based expanding foam Fire rating: B1