It is very easy to use since no caulking gun is needed. Just slide red tab to open and use attached red lever to dispense. The product dispenses easily and you can easily adjust how much comes out as you dispense it. It is very handy as it can work on a variety of different materials.  It is very helpful that it is water cleanup which is nice if you get some on your hands or if it gets in a area were you do not need it.  It appears to be very strong adhesive