[f. TACKY a.2 + -NESS.] The quality of being tacky or slightly adhesive.
1883. R. Haldane, Workshop Receipts, Ser. II. 184/2. This varnish retains sufficient tackiness to hold powdered graphite on its surface.
1908. Installation News, II. 55/1. No doubt the tackiness of the enamel also helps to hold the tube in place.