I recently purchased some gun grade expanding foam. There were two choices in my local decorators' merchant- Bondit Megafoam and a Soudall foam. I opted for the former because it claimed to work at all angles and additionally had a tube if I didn't want to use my gun.
Both were about £11 each (even though the same product is nearly half the price at Selco BM (both retailers are owned by the Grafton group.).
My first task was to remove GRP flashing and run foam behind the GRP upstands on a parapet flat roof. I then used it to seal the chases.
The next task was to fill a gap between an old concrete window sill and the replacement timber sliding sash window.
When it came to cutting away the excess, I noticed that the foam came away from the painted windows without leaving any residue behind. The same was true of the GRP and rendered parapet. I was even able to pull it off newspaper (that it fell on to) without it ripping the paper.
Days after, the cut away foam can be compressed to about 75(?)% of the expanded size by squeezing it between my fingers.
Yes, I did mist the surfaces first (but not the newspaper).
The day after buying the can, I went back and purchased the Soudall foam, which had the properties that I would expect of expanding foam.
I have used numerous Bond It products, which I have been happy with, this one I will avoid in the future unless I want a foam that it easy to remove the excess.
Both were about £11 each (even though the same product is nearly half the price at Selco BM (both retailers are owned by the Grafton group.).
My first task was to remove GRP flashing and run foam behind the GRP upstands on a parapet flat roof. I then used it to seal the chases.
The next task was to fill a gap between an old concrete window sill and the replacement timber sliding sash window.
When it came to cutting away the excess, I noticed that the foam came away from the painted windows without leaving any residue behind. The same was true of the GRP and rendered parapet. I was even able to pull it off newspaper (that it fell on to) without it ripping the paper.
Days after, the cut away foam can be compressed to about 75(?)% of the expanded size by squeezing it between my fingers.
Yes, I did mist the surfaces first (but not the newspaper).
The day after buying the can, I went back and purchased the Soudall foam, which had the properties that I would expect of expanding foam.
I have used numerous Bond It products, which I have been happy with, this one I will avoid in the future unless I want a foam that it easy to remove the excess.
