Filling foam

Wherever a hole needs to be filled quickly, you can bet that filling foam has probably been used. Is there a hole in the cable shaft that needs to be filled? Have you installed pipe and want to close the wall opening quickly? In these cases, filling foam is often used because
  • it adheres to most surfaces
  • is easy to apply
  • can cope easily with irregular joints and closures
  • expands even into difficult-to-access cracks
  • can be painted or plastered over easily

Tip: Things to think about when using filling foam

PU foam requires moisture to harden properly. It is best if you wet the edges of the hole yourself and the freshly applied foam with water. When working at depths, for instance when a deep pipe needs to be filled, you should apply the foam in layers and wet each layer again separately.


In tight spaces the filling foam does not have enough moisture and may therefore not be able to harden correctly. The additional water ensures that the foam has enough moisture for its hardening process.

This may also interest you

PU adhesive foam for bonding and insulating
Filling wall recesses with PU filling and insulating foam
Working safely with PU