Product Data Sheet Safety Data Sheet Show all documents
Sika Boom® Gun Grade Expanding Foam

Sika Boom® Gun Grade Expanding Foam

Fix and fill gun grade multipurpose polyurethane expanding foam.

Sika Boom® Gun Grade Expanding Foam is a fast-setting, one-part polyurethane expanding foam designed for quick, efficient fixing, filling and sealing. One can yields up to 50 times the original can contents to fill gaps, cracks, and irregular spaces with ease. Once cured, it can be cut, sawn, or plastered in just one hour. It effectively fills wide or irregular gaps where traditional fillers fail, and it provides reliable insulating and sound‑deadening performance. Designed to be used with a Foam Applicator Gun.

  • Quick setting - can be cut, sawn or plastered in as little as one hour.
  • Economical in use - expands up to 50 times its original volume.
  • Fills irregular and broad gaps where most conventional fillers would fail.
  • Possesses insulating and sound deadening properties.
  • Expansion - 45 litres.
  • Cell structure - medium fine.
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Product Data Sheet Safety Data Sheet Show all documents

Usage

  • Filling
    • Roof tile voids and draught points around the home.
    • Gaps around pipe entries through walls.
    • Gaps around door and window frames.
    • Electrical wire chasing prior to plastering.
    • Deep joints prior to applying sealant or plaster.
    • Gaps and cracks in walls and floorboards.
  • Fixing
    • Door frames.
    • Windowsills and thresholds.
  • Insulating
    • Behind cladding to exterior walls.
    • Behind soffit and barge boards.  

Advantages

  • Quick setting - can be cut, sawn or plastered in as little as one hour.
  • Economical in use - expands up to 50 times its original volume.
  • Fills irregular and broad gaps where most conventional fillers would fail.
  • Possesses insulating and sound deadening properties.
  • Expansion - 45 litres.
  • Cell structure - medium fine.

Packaging

750 ml canister

Product Details

Product Information

Shelf Life

15 months from date of manufacture at +15 °C to +20 °C. Once opened, shelf life is reduced to one month from original use.

Storage Conditions

Store upright between +5 °C and +25 °C. Pressurised container. Protect from sunlight and do not expose to temperatures above +50 °C. Do not pierce or burn the can even after use. Store as flammable liquid. Note: Elevated temperatures will reduce shelf life dramatically.
Technical Information

Compressive Strength

0.03 MPa

Dimensional Stability

± 10%

Reaction to Fire

B3

Thermal Resistance

-40 °C to +80 °C

Thermal Conductivity

0.036 W/m*K (at 20 °C)

Water Absorption

Max. 1 % vol.

Application

Application Information

Product Temperature

+5 °C to +30 °C

Substrate Temperature

-2 °C to +30 °C

Cutting Time

20 to 45 minutes (10 mm width)

Tack Free Time

4 to 8 minutes (10 mm width)
Consumption

Yield

45 litres
Application steps

SUBSTRATE PREPARATION

Ensure all surfaces are clean, sound and free from dust and loose particles. Moisten surfaces to be sealed with water. This assists the curing process.

APPLICATION

  • Shake can well before use (about 20 times) and before attaching to the gun.
  • Remove black cap and screw gun carefully on to the adapter of the can. Take care not to over-tighten.
  • ALWAYS USE WITH CAN UPSIDE DOWN.
  • Partially fill cavities as foam will expand to fill the remaining space.
  • Any excess foam should be removed whilst still wet using Sika Boom® Foam Cleaner.
  • Cured foam must be removed mechanically.
  • When used for fixing door frames, supports must remain in place until the foam is fully cured. 

Please note:

When transported in cars, keep in boot, out of direct sunlight. When removing cured foam from skin, take care not to damage with abrasives. Grease skin with body lotion or similar. 

CLEANING OF TOOLS

  • Thoroughly purge the applicator gun with Sika Boom® Foam Cleaner until the jet is clear of foam.
  • Thoroughly clean the valve tip with Sika Boom® Foam Cleaner after use.
  • The canister can be left attached to the applicator gun between jobs.

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