Cedilis2 Pack 0.5 Gallon Hand Held Garden Sprayer, Manual Pump Pressure Water Sprayers with Adjustable Nozzle, Plastic Watering Can, Hand Sprayer for Watering Misting Plants, Lawn, Garden(2L Green)

Q: Can this product be used with herbal fungicides?

I'm using it to mix Rose RX concentrate to spray plants and have not had any issue with clogging or anything. Of note, though, is that it's not capable of a fine mist. I'm not sure what you're treating, but just know that it may not be the best choice for extremely delicate foliage.