AF 145 is a hybrid adhesive, which means that you can use is at a pressure sensitive adhesive or as a wet set adhesive. As a pressure sensitive adhesive, there's nothing quicker. It's ready in as little as 20 minutes. As a wet set adhesive, simply spread and leave it to air for a minimum of 5 minutes before fitting. ARDEX AF 148 can only be used as a pressure sensitive adhesive but after leaving it to air for 30-45 minutes you'll get an extended working time of up to 3 hours to fit your floorcovering. With both AF 145 and AF 148 there's no need to roll the adhesive ribs and you'll get amazing grab and final bond strength.