In Australia I use a product called "Out of Bounds"

20ml in 2 litres did around windows, doors and corners where spiders seem to thrive.  Fine spray from a pressurized sprayer.

Think twice a year will keep them at bay.

No info on active chemical on the 2 ltr container I bought.  [Thought that was a legal requirement!]  Aha!  Sticky on the back of the container - I've removed the multi pages instruction label!

But  www.barmac.com.au  gives info on Pest Management , and a label there tells me the active ingredient is 100g/lt. Bifenthrin

The 2 ltr container I got will do for years!