ADH · Adhesives & sealants
Sika Boom®-558 Flex
Flexible PU expansion foam for sealing joints around window and door frames.
A flexible polyurethane foam designed specifically for sealing joints around window and door frames. It features low post-expansion and low curing pressure, allowing it to withstand large movements in joints while providing excellent thermal and acoustic insulation.
Specifications
- Type
- PU foam
- Property
- flexible
- Application
- gap-filling
- Expansion
- low post-expansion
Data transparency
- Source
- Sika’s published documentation
- Last verified
- 2026-06-23
- Stored
- specifications only
- Not stored
- prices, product images
- Found an error?
- Report a correction
Sources
- https://www.sika.com/en/construction/construction-foams.html — verified 2026-06-23
Product id: sika-boom-558-flex · last updated 2026-06-23 · JSON