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Expanding Foam Sika Boom AP:

Sika Boom-AP - Expanding foam


Sika Boom-AP is a fast curing expanding foam. It can be used as a fixing and insulating foam.


Filling gaps and voids.
Blocking out dust, noise and draft.
Installation of window and doorframes.
Insulation of pipes.


Can be used when held upside down.
Suitable for use outside.
Can be cut, sanded and painted.
Has excellent adhesion to most substrates.
Quick and easy gap filler.
Reaches difficult access areas that need to be filled.

Storage and Shelf Life:

This product when stored at temperatures of between 18C and 22C will have a shelf life of twelve (12) months.

Instructions for Use

Surface Preparation:

All surfaces must be free of dust, grease, oil and surface contaminates. The surface should be pre-moistened with water before application. To ensure that the foam cures at an optimum rate, and secondary foam expansion is prevented.


Screw the nozzle onto the can.
Shake can thoroughly (approximately 20 times) before use.
Apply foam by pointing nozzle into area to be filled and depress. It can be applied valve up or down.
Foam will dispense rapidly and will expand 1.5 to 2 times its size as it comes out of the can.
The quantity of foam can be regulated by varying the pressure of the adapter.


Remove fresh spots of foam immediately using cleaner such as acetone. Cured foam can only be removed mechanically.

Technical Data (Typical):





Light yellow

Tack Free Time

10 minutes approximately (@23C)

Cutting Time

30 minutes approximately (@23C)


25 litres (500 ml can)
38 litres (750 ml can)


24 kg/m3

Application Temperature

+5C to +35C

Service Temperature

-40C to +80C

Heat Conductivity

0.033 W/mK


Mechanical/ Physical Properties:


Mechanical/ Physical Properties:


Mechanical/ Physical Properties:


Compressive Strength

0.04 +/- 0.01 N/mm2 with 10% deformation (+23C / 50% r.h.)

Shear Strength

0.04 +/- 0.02 N/mm2 (+23C / 50% r.h.)

Tensile Strength

0.08 +/- 0.02 N/mm2 (+23C / 50% r.h.)

Elongation at Break

38% +/- 2% (+23C / 50% r.h.)



Consumption can be regulated by the pressure and angle of the valve/adapter. Yield:500 ml can up to 25 L (+/- 3 L), 750 ml can up to 38 L (+/- 3 L)


500 ml can
750 ml can


Important Notes:

Sika Boom-AP does not adhere to Teflon, polythene, silicone or grease.

For special uses, test Sika Boom-AP in advance.

Aged material can yield up to 30% lower than it's specified value.   


Important Notes:

Sika Boom-AP does not adhere to Teflon, polythene, silicone or grease.

For special uses, test Sika Boom-AP in advance.

Aged material can yield up to 30% lower than it's specified value.   


Important Notes:

Sika Boom-AP does not adhere to Teflon, polythene, silicone or grease.

For special uses, test Sika Boom-AP in advance.

Aged material can yield up to 30% lower than it's specified value.   


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