This Premium BLACK P.D.R. glue is awesome and works year-round, and has great adhesion, works best 65 to 80 degrees this stuff pulls fantastic. I use this glue and get great results on cooler panels as well. Please educate yourself on using glue pulling before purchase. This Blend was developed for the professional P.d.r. Technician. This glue blend pulls up to 30% harder than other brands. We do not recommend using this glue in the heat of direct sunlight. If you are using for hail in an indoor climate-controlled building this is your go to glue. If the panel is hotter and it's too hot for the glue to set up, you will have to use a cooling technique!!! Canned air or compressed air usually works well for this.