Hot Crack Filler is a generic term used to describe the method that is used to fill cracks with this type of sealant. The hot crack filler we sell is a rubbery sealer that must be heated to around 400º with melter equipment, before it can be applied to a crack using a crack filling equipment. Most professionals prefer Hot Crack Filler over Cold because it allows traffic in about 40 minutes of application compared to several hours with Cold. Most Home Owners and DIY Small Businesses looking to fill cracks in their driveways or parking lots usually have better luck with our Cold Crack Filler because bulky or expensive equipment isn't necessary. If you are looking for equipment, we sell that too!