Sika Boom-420 Fire - Fire resistant expanding PU foam - Sika

Sika Boom-420 Fire - Fire resistant expanding PU foam - Sika

Sika Boom-420 Fire is an expanding, single-component, fire-resistant polyurethane foam.

The product is fire resistant for up to 180 minutes according to EN 1366-4.
The combo aerosol of Sika Boom-420 Fire allows application by spray gun (with adapter) or directly with the extrusion nozzle provided.

Features

• Fire resistance up to 180 minutes.
• Aerosol combo for application by spray gun or directly from the extrusion nozzle.
• Mono-component, ready to use.
• Safety valve for longer shelf life
• Cured foam can be sanded, shaped and cut.

Application areas

• Sika Boom-420 Fire restores the performance of the fire resistance of walls and floors that contain linear joints.
• For interior application only.

Application

Spray application:

1. After shaking the package, remove the extrusion nozzle from the adapter.
2. Screw Sika Boom-420 Fire with the aerosol adapter onto the gun valve.
   The amount of expanding foam extruded can be adjusted by pressing the trigger more or less or by tightening or loosening the knob of the gun.
3. Spray the mouse keeping the aerosol upside down.
4. Fill deep joints in several layers.
5. Wait long enough for each layer to expand and polymerize sufficiently, before rewetting for the next layer.
6. Do not completely fill holes/cavities as foam expands during cure.
7. Use extension tube to fill narrow openings (flow rate with extension tube is smaller).
8. Do not unscrew the unemptied Sika Boom-420 Fire aerosol from the gun.
   Removing an unemptied Sika Boom-420 Fire aerosol may result in splashing of foam.
9. Thoroughly clean the gun after use with Sika Boom Cleaner.
10. Removing aerosol without cleaning with Sika Boom Cleaner may damage the gun.

Extrusion nozzle application:

1. After shaking the package, remove the extrusion nozzle from the adapter and remove the adapter from the aerosol.
2. Screw the extrusion nozzle firmly onto the aerosol without pressing the trigger.
   The amount of extruded expanding foam can be adjusted by pressing the trigger more or less.
3. Spray the mouse keeping the aerosol upside down. Fill deep joints in several layers.
4. Wait long enough for each layer to expand and polymerize sufficiently, before rewetting for the next layer.
5. Do not completely fill holes/cavities as foam expands during cure.
6. Use extension tube to fill narrow openings (flow rate with extension tube is smaller).

Consumption

*with gasket 20 × 50 mm

Conditioning

750 ml aerosol with safety valve: Red.

Sika Boom-400 Fire replacement