I used this product with the accelerator. The instructions say don't mix more than will be used in 4 hours. No way this is workable for 4 hours. It began setting up in minutes. Temperature was just under 70 degrees and humidity was about 80 percent. Both parameters outside specs. I applied the first coat about 5 minutes after starting mixing adhesive and accelerator and it was tacky in a couple minutes. Went to apply the second coat and the product in the mixing container was already rubbery and difficult to spread. By the third coat, another two minutes later, it was impossible to spread evenly. Once applied, the bond was perfect. No complaint with results, just with application.