Sika Boom-431 Multiposition Foam 750 ml

Sika Boom-431 Multiposition Foam 750 ml

The Sika Boom-431 Multiposition is a versatile polyurethane foam sealant designed for a wide range of building and construction applications. It provides reliable gap-filling and sealing performance in both interior and exterior environments.

• Multiposition application allows dispensing in any orientation — horizontal, vertical, or overhead — without loss of consistency or yield
• 750 ml cartridge format delivers ample material for medium-scale sealing and gap-filling tasks in workshop and on-site use
• Polyurethane foam formulation ensures strong adhesion to common building substrates including concrete, masonry, wood, and metal
• Low weight of 0.923 kg per unit keeps handling and transport effortless for single-operator workflows

Das zeichnet Sika Boom-431 Multiposition aus

The Boom-431 stands out for its true multiposition capability, which eliminates the need to reposition the cartridge or wait for partial curing before continuing a seal. The balanced foam density provides enough expansion to fill irregular gaps while remaining controllable and cleanable.

Ideal für...

Suitable for tradespeople, maintenance technicians, and DIY installers working on building envelopes, window frames, door frames, and general construction joints. The 750 ml size is well suited for tasks that require more material than a standard 310 ml cartridge but do not warrant a full 750 ml bulk pack.

Anwendung von Sika Boom-431 Multiposition

1. Clean the substrate surface thoroughly, removing dust, grease, and loose particles
2. Cut the nozzle tip at a 45-degree angle to the desired bead width
3. Apply the foam evenly into the gap or joint, filling to approximately 75–80% of the gap depth
4. Allow the foam to expand and cure according to ambient conditions — typically skin-over in 5–15 minutes and full cure within 24 hours
5. Trim excess cured foam with a utility knife if needed for a flush finish