Yes, the fabric must be thoroughly dry before impregnating with Sprayhood & Tent Protector.
- Sprayhood & Tent Protector is a strong water-based impregnating agent.
- The impregnating agent cannot get to wherever there is still water in the fabric.
- Eventually the water evaporates and the active formula remains.
- So make sure that the tent canvas is well saturated with the impregnating agent.