Demon WP or similar ok for indoors?

[StageLeft]

I have used Demon WP or some no-name similar one I ordered on the net to put a SMACK down on bugs around my house. I need some now just for spiders that think it's ok to inhabit the cracks and holes around my unfinished basement. Is this stuff ok for indoors, and if so what's a good internet source now for a few small packets? Thanks!

 

[KK]

I bought a pound of the stuff years ago, still have it. It seems to work great, but it does leave a white residue. Unfinished basement should be fine to spray it in.