Infinity PUR Mp75 PUR hot melt is a general-purpose adhesive that is extremely versatile and creates a strong bond between a wide variety of substrates. It has a 75 second set time and will continue to cure as it interacts with moisture from the air. The MP75 is waterproof, making it a great solution for both interior and exterior projects. The MP75 is a standard temperature PUR that is applied at 250 degrees F. This PUR hot Melt greatly reduces and even eliminates the need for staples, nails, screws, and other fasteners because of its quick set time and superb bond strength.