External spray foam filler that sets hard?

TELLIT01

Are there any spray foam fillers that actually set hard?  I need to fill a hole which sparrows use to get in for a nest area.  The last stuff I used, I can't remember the name, set firm but didn't stop the birds eventually removing it.  Location is awkward to access so being able to use a spray with the flexible pipe is really the only way I can get at the hole.  Basically working blind round a corner as there is nowhere to position a ladder to be able to see the hole.

Nobbie1967

Couldn’t you just push some mortar into the hole with your hand, then smooth off with a filling knife or trowel?

TELLIT01

Nobbie1967 said:

Couldn’t you just push some mortar into the hole with your hand, then smooth off with a filling knife or trowel?

It's difficult to reach.  I can only just get to it with the extended tube on the spray can.

fenwick458

It's never going to set hard enough for the birds not to destroy it and use it for nesting material. I filled a gap in the soffit with it years ago and the birds must have thought it was great fun they shredded it to bits in no time and it was all over the back garden blowing around in the wind. I did the job properly the second time round with a trowel full of mortar, still there to this day although I don't live there anymore

Eldi_Dos

If it is in mortar or brickwork would a suitable sized wooden dowel  pushed and tapped in do.

Or could try fire stopping compound (Mapei Mapeflex Firestop) once set no bird is going to peck that out.

greyteam1959

Can you reach round to push a bit of scrunched up chicken wire netting in the hole then use the spray foam ?
The birds will have a job pecking that out.

Lorian

Depending on the size of the hole you could either fill it or cover the pu foam with everbuild stixall. Go for the clear though it will make a mess of anything you drop it on to. Dispensed from a normal silicon type gun giving you extra reach. Will be really messy if you can't see the hole though. What's the hole actually in? It sets like quite solid rubber.

TELLIT01

The hole is from where cavity wall insulation was injected years ago.  The cement 'bung' fell out a few years ago, so a hole about 20 to 25 mm diameter.  What amazed me though was that the birds would be so determined to get back into a previous nest site.  I thought they would just go somewhere else.

mi-key

What may work is getting a length of hosepipe so you can get it around the corner into the hole. Fill the hosepipe with mortar, then us something that fits inside the hosepipe like a piece of dowel to push the mortar out. Sort of like making your own mortar filled spray can

Martin_the_Unjust

Something like this perhaps? 

https://www.toolstation.com/constructa-pro-adhesive-foam/p60449

TELLIT01

Thanks for the suggestions.  I'll have to see what is practical.  When I previously filled the hole I had the ladder on the side wall and had to stretch as far as I dare, even with the ladder being held, to get the very end of the nozzle of the spray can into the hole.