I ordered this last year and I wanted to wait to see whether it worked or not. I had to apply damp proofing on the supporting stacks propping up my floor joist in the crawl space under the house. The house is less than two feet high and runs the full length and breadth of the property. Using a regular injection machine with pipes/power supply in such a restricted space would have been a night mare. Using nothing more than a drill I was able to apply the treatment and I must say a year on it looks likes it's done the job. I would definitely recommend this to my friends and family.