LANIAKEA6 Pack Caulk Tubes 300ML Empty Plastic Caulk Tubes, 8.6x1.9 Inch Fillable Sealant Caulking Tubes, Latex Caulk Tubes

I used many of these for tile roof repair. I used a trowel to fill up the tubes and then used a caulking gun to pump this stuff under the tiles. I was able to reuse these by connecting a tire pump and tire stem replacement (look for it on Amazon; With enough of the caulk tubes nozzle cut, the tire stem replacements will fit over the nozzle. I just pumped a little bit of air and watched the bottom of the tube come out super easily.

I use these for Tightbond 2 wood glue in my woodworking. It is perfect for large glue-ups. I can put down a fair amount of glue in no time, spread it out, and have the piece together before the glue starts to set-up.

No instructions included and no videos on line and no manufacturer contact information. Useless if I can't figure out how to refill what is supposed to be a refillable caulk tube.

It says it works for grouting tile...well you put the line and still have to use the spatula so it doesn't make any difference whatsoever except a mess trying to get it in the tube. Total waste of $ for this one.