Albel and Lavi encountered said robot, arriving at the building at the same time it did. When they realized that it was repairing the cylinder, Albel suggested that they take the rest of the undamaged fabric.
There was no telling whether the stuff would turn out to be useful or not. At the very least, the stuff was strong enough that he couldn't cut it with steel. And once the robot had finished the repairs, it might take the fabric away or something.
Armed with a load of fabric each, the two delivered it back to the place where they'd slept, and then continued exploring. They followed a few of the robots around, but didn't find much else of any value, eventually returning at the end of the day to sleep.
The following morning, Albel awoke to find a small item lying next to his hand, on the pillow. He picked it up curiously, and found that it was adhesive on one side, the adhesive sticking to his fingers securely, though not so securely that he couldn't pull it off...if he had another hand to do so with.
He rose and went in search of Lavi, the item still stuck to the tips of his fingers.