Solid Hardwood, Engineered and Laminate Flooring - glue dry time for pre-engineered wood floor

Two days ago I glued part of my wood floor project to a concrete floor and the glue is still tacky today. I'm laying Universal pre-engineered wood flooring and using their brand of acrylic glue. The instructions never told me what to expect for the cure time and I'm afraid to continue if the glue is bad. This is a bedroom installation so temperature and moisture is not a problem. Am I expecting too much for the cure time or was my glue too old when I bought it?

Is there a possibility that the glue has ever been frozen? Are you positive that the glue is an acrylic based product? The most common glue used to install flooring sets in about 3 hours and cures in 24 hours.

It's acrylic alright. A very mild winter here in Houston and I seriously doubt it could have froze before I bought it from Home Depot. The glue has set well enough to hold the planks from moving, but it still has some stickiness, like that of masking tape. I don't trust the Home Depot "expert" who say's to give it a few more days. Thanks for your reply.

For those who need to know, I talked to a rep of Universal wood floor who referred me to a rep from the glue manufacture for Universal. He said that this glue is much different from most other brands when it comes to dry time. It could be of Silly Putty density forever, and it may take a few months to get that point depending upon humidity. The initial curing does take place during the first day and will hold the floor sufficiently. This is normal for that brand of glue. This property will help with the expansion and contraction of the wood flooring over concrete.