Adding Neem oil to water to spray on my dog, the oil obviously doesn't mix with water, it floats on the top. Add a few drops of this emulsifier and the oil will disperse, give it a shake to mix it then spray.
I recently tried a cheaper emulsifier that I found online to go with the remainder of the neem oil I had at the time, but it was useless! Just goes to show, never compromise on quality. Your's works great every time! Thankyou.