When applied to turf, Turf Mark Blue disappears within 24-48 hours.
We have never had anyone have problems with the Turf Mark Blue staining a sprayer tank of any sort. It washes off most surfaces with soap and water.
Yes, Turf Mark Blue will leave a permanent stain on concrete and studs. You would want to cover any flooring that you do not want sprayed when using Turf Mark Blue or other dyes indoors.
While it may not stain permanently, it is likely that Turf Mark Blue Spray Indicator Dye will stain your white PVC fencing at least for a little while.
Yes, you can use Turf Mark Blue with nematodes and organics per the product manufacturer. Please let us know if we can be of any further assistance.
You can add a dye such as Turf Mark Blue to SedgeHammer (or most any herbicide) to see where it has been sprayed.
We recommend wearing gloves when handling, mixing and applying Turf Mark Blue. We cannot guarantee that the product will not stain hands. We recommend that you wear a mask when treating with any product especially in unventilated areas.