I’m only doing a 25 square foot bathroom with 5/8” x 8” engineered European Oak. All the best adhesives seem to be in 4 gallon buckets. Is there a product that a homeowner can purchase that will do the job that comes in a smaller quantity?

I should add that this is on tested concrete slab.

Caulking tubes are filled with Bostick best glue along with sausage tubes made for a special gun that hold more glue than the caulking size are available from distributors.

I saw the caulking tubes of Bostick. Are you saying to apply the adhesive to the back of each plank with the tube or squeeze it out on the concrete and then spread it with a nothched trowel?

Thanks again for your suggestions.

Scott

You can get the same results as using a notched trowel with the glue gun. Run a bead on both edges and then a serpentine pattern between the lines. Use some weight over the flooring with 5 gal. buckets filled with water. A commercial painting company will have plenty if you call ahead. Use a quarter inch bead.

Sounds like a plan! Thanks!

Tested the concrete eh? What test?
Your wood will still be subject to moisture emissions from slab. No slab is perfectly dry. And this will certainly fail at some point. Maybe not right away but it will, not a industry approved method on CC, wood substrate yes.
Float it with an underlayment and some T&G adhesive.

2500 sq. ft. was installed by reputable flooring company on 12 year old slab. I remember seeing the report of the moisture content and it was well within the acceptable limits for gluing down engineered wood planks. The 2500 sq. ft. have been down for 2 years with no issues. I am doing a bathroom with the same wood flooring that is currently tiled. I installed 3000 sq. ft. of 2 1/4” solid red oak 35 years ago in my current home, drum sanded and finished twice, so I’m a little familiar with install over wood subfloor. Just looking to do a small job for my daughter.

I think he's saying beads and not a full spread will not be a sufficient moisture barrier and could allow moisture to get into the wood.

Yes. Whether I get a 2 gallon bucket or a bunch of tubes, I’ll be doing a full spread.