Closamectin and SpotOn pour on - how rain fast ?

[JP1]

Didn’t catch or move any stock yesterday due to rain.

Got the above on all 40 cattle in six locations and then the heavens opened despite nothing on the forecast

How rain fast is it ?

 

[cheviot53]

The data sheet says they don't know but advise housing if rain is imminent . With sheep spot =on needs a couple hours to be safe