The best brand for insulating winter concrete jobs. Preferred nationwide by commercial and pro contractors to protect fresh concrete in cold weather. Grip-Rite® Extreme Curing Blankets feature a buttonless design that eliminates the need for plastic buttons to hold the insulation in place. This means reduced catching and tearing, reduced moisture penetration, and less disturbance of the wet concrete surface. A Grip-Rite exclusive, Extreme Series Curing Blanket Patent 10,077,565. Features & Benefits Patented reinforced webbing design Patent-pending buttonless design reduces, catching and tearing, moisture penetration, disturbance of wet concrete surfaces High density woven PE envelope coated on both sides for extreme vapor retarding properties. Grip-Rite blankets have a low perm rating of 0.87 New combination Woven PE and foil faced blanket with higher R values Insulation is full edge to edge design with zero insulation voids at the hems PE webbing is perforated with eyelets spaced at 10.0 cm intervals allowing the blankets to be fastened together, or to scaffolding or forms Extreme blankets can be used as an insulated tarp when installed on scaffolding (Note – Grip-Rite extreme blankets are not flame retardant. Check local fire codes before installing)