GREAT STUFF PROGaps and Cracks - 30oz Fireblock Foam Insulation Sealant, Pack of 12. Closed Cell, Polyurethane Expanding Spray Foam. Seals & Insulates Gaps Up to 3". Applicator Gun, Cleaner Included

Used to fill in cracks and gaps around a log home. Much cheaper than chinking. Will see how long it lasts. These cans just keep going and going. One downside is they don't always fit properly to the dispenser. Will leak at joint and get your glove covered hand covered in foam.

The cost for this compared to the little cans is close to the same but the ease of use with this is great. The best part is you don’t have to use the whole can right now. Unlike the individual cans that are impossible to use even later that day most of the time.

I purchased this solely because of the 30oz cans. I needed to fill a lot of cracks in prep for insulation. These cans last damn near forever. It expands and seals fairly well. It's good for what it does and the large cans work well.

Used them with an xl gun to fill in hollow doors for sound proofing purposes. While I did not measure actual decibel reduction, it is clear that sounds from other rooms are now muffled. While not perfect, much cheaper than replacing 8 doors to solid doors and good enough. The doors are also a little heavier which gives them a nice feel while opening and closing. Used a little over 1 can per door.

Very hard to get a good seal when you start a new can. The rest of the product was great but get a different gun.

I added block foam insulation to my rim joist and this filled thegaps and created air tight seal.

Lot more foam to use!

these larger cans are kick a##