For all of your Home Improvement insulation projects

Look no further to than to Sika Boom -121 Insulation. Engineered for efficiency and reliability, this polyurethane expanding foam is perfect to seal large gaps effortlessly, providing superior thermal and acoustic insulation. Ideal for insulating large gaps in walls, roofs, attics and basements, Sika Boom -121 Insulation offers excellent adhesion to many building materials. Whether you're tackling a DIY project or a professional job, Sika Boom -121 Insulation will deliver exceptional results. Enhance your home's energy efficiency and comfort with Sika Boom -121 Insulation.

APPLICATIONS:
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Fixing and insulating door and window frames
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Filling and sealing gaps, joints and cavities
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Filling penetrations in walls
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Perimeter insulation of electrical outlets and water pipes
CHARACTERISTICS:
Excellent adhesion & filling capacity
High heat-insulating and sound-absorbing properties
Adheres to almost all construction materials, except polyethylene, Teflon, silicone and surfaces with oils, greases, release agents, etc.
Fungus resistant, waterproof, dyeable
Mature foam is rigid and can be cut, shaped and rubbed.

- HIGH EXPANSION RATE – SikaBoom AP expandable foam provides effective filling, sealing and insulation to gaps and cracks up to three inches in size
- IMPROVED DURABILITY – Use this fixing foam to fill and insulate window connection joints and gaps in doorframes, AC duct and vents, roller blind housings and pipe entry points
- FLEXIBLE – Multi-positioning polyurethane foam is high density to provide a strong seal, withstanding building and material movement
- SUPERIOR INSULATION – Being a PU foam spray, it thermally insulates, keeps out the cold and draughts, and dampens noise
- CHOOSE YOUR SIZE – Cans come in 250 ml, 500 ml and 750 ml quantities of light yellow foam
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INSULATION SOLUTION: Sika Boom -121 Insulation is a high-quality expanding foam sealant designed for heat and sound insulation
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STRAY INCLUDED: User-friendly design and application straw make Sika Boom -121 Insulation easy to use, suitable for both professionals and DIYers
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GAP FILLER: Expanding formula expands to fill voids and gaps, providing an airtight seal and enhancing energy efficiency
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VERSATILE USE: Ideal for insulating large gaps in Rim joists, Roofs, Attics, Basements, Walls and Interfloor overlapping in a variety of substrates, including Concrete, Wood and Metal
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QUICK CURING: Rapid-curing formula dries quickly, allowing for fast and efficient application
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YIELD: Up to 3 m² with 1.5 cm thickness for one layer when applied from a distance of ~40 cm