Soudal Flexifoam gun is a one-component, self-expanding, ready to use polyurethane foam. The product has minimal expansion after application (less than 50%) and is therefore very economical to use. Flexifoam is very elastic and has a very high Acoustic Rating value.

Soudal Flexifoam is much more elastic than standard PU-foam:

• Elastic Recovery ( ISO 1856) is up to 90% if the foam is compressed by 75%.
• Traditional PU-foam does not have any recovery if the compression is higher than 10%.
• Elongation at break is three times that of traditional foam. The maximum elongation before breaking (DIN 18540) is about 45% compared to 15% for traditional PU-foam.

Thanks to these flexibility properties, the foam will maintain its general characteristics much better. Joint movements through the years will cause a traditional PU-foam to break and lose some of the following properties:

Soudal Flexifoam follows the movements of the joint and will keep its insulating properties over the years. This is certainly a necessity for larger windows in PVC or aluminium, especially in smaller joints (e.g. 2 to 3 cm width). The maximum movement allowed for traditional foam before breaking is only 2mm compression or 3mm elongation. Moreover, after several years the maximum elongation and compression will reduce to possibly 50%. That?s why Soudal created Flexifoam which has high movement capability as well as stress resistance in time.