The product is good, but a bit pricey. Add to that the additional postage and only sent second class then there is room for improvement on both price and the time waiting for it to arrive. Filled some gaps in existing window putty and put in a whole bead. Easy enough to work and a nice finish. Electric gun to apply would definitely be an advantage as it was a little hard going. The following day it was still a little pliable to the point of thinking it hadn’t yet cured, but it could be painted over. Whether this turns out to be good value or not depends on how it fairs over time. At the moment I would say that I would buy it again.