- Q.What is the best material
to use to patch Icynene spray foam insulation?
Sometimes it’s necessary to remove a
substantial amount of the stuff after it has been
Ballantyne, project engineer at Icynene, Inc.,
responds: The best way to patch a hole in
Icynene insulation will depend on the size of the
repair. For small and medium-sized patches, a can
of spray urethane foam (one-component foam from the
lumberyard or hardware store) works very well.
There is no compatibility problem with using other
foam insulation products directly against
However, a large patch would require many cans
of one-component foam, so it would be better
repaired by installing more Icynene, or another
two-component foam product applied by a
Fiberglass batt insulation would be an option of
last resort, since it will not be as resistant to
air leakage as Icynene.