Liquid EPDM is a seamless roof coating. It is an Elastomeric rubber roof product verses a 100% silicon seamless rubber roof system. These rubber roof systems are 1/2 the price and are superior to the old EPDM black fully-adhered rubber roof systems. They are also much hotter–180 degrees in the sun while the the silicon 2000 white cool roof system is at an ambient temperature.
Keep in mind, whatever system you choose is only as good as the roofing company that applied it, and the roofing company’s experience and track record. It is always important to ask any company you are considering working with if they have experience in roof coatings.