Adhesive for engineered flooring on mixed concrete/wood

[rar4s]

Hi, guys. I am part way through laying 14mm engineered flooring over a pretty rough and uneven mixed concrete/wood floor. I have consciously NOT done this the "right" way (e.g. https://www.diynot.com/diy/threads/...neven-wooden-subfloor-or-concrete-wood.77960/) and am just sticking it down as best I can. The floor is pretty uneven, but at least sound, and I'm using weights and straps etc. It seems to be OK for now.

Logistically, time-wise and financially it's just not feasible for me to put down ply, screed, etc. So, given this situation, do you guys have any favourite adhesives? I have used most of a tub of SikaBond MS Wood Floor Adhesive already, and I'm wondering if there is something better. It was meant to cover the whole area but I will need several more containers.

It's alright - pretty stiff to spread and sadly a couple of cm of skin on the 2nd day despite my efforts to seal it. I wonder if it came to me partly cured. I can't find a video of this specific product but videos of different adhesives show them being MUCH more fluid than this.

Since I have to more containers anyway, would anyone like to recommend a different adhesive or should I stick to this one? Something suitable for wood and concrete.

 

[rar4s]

Despite hammering the lid down yesterday, and wrapping the whole thing in a bag, I found another 2cm of skin on this product today! Really bad.

 

[crazydaze]

Keep us updated as to how the installation stands up over the next few months/summer, glueing the floor down requires an even spread of adhesive and good adhesion/grip over a uniformed area, the glues have to work under a significant amount or pressure exerted laterally by the wood flooring as it moves seasonally, as well as being able to cope with pressure exerted from above through weight and movement of foot traffic hence why the floor needs to be flat and smooth before installation.