Aspha-Min is a product of Eurovia Services GmbH, Bottrop, Germany. It is available in a very fine white powdered form in 25 or 50 kg bags or in bulk for silos. It is a manufactured synthetic zeolite (Sodium Aluminum Silicate), which has been hydro thermally crystallized. The percentage of water held internally by the zeolite is 21 percent by mass and is released in the temperature range of 185° - 360° F. By adding Aspha-Min to the mix at the same time as the binder, a very fine water spray is created. This release of water creates a volume expansion of the binder that results in asphalt foam and allows increased workability and aggregate coating at lower temperatures.

Eurovia recommends adding Aspha-Min at a rate of 0.3 percent by mass of the mix, which can result in a potential 54° F reduction in typical HMA production temperatures. This reduction in temperature is reported to lead to a 30 percent reduction in fuel energy consumption. Eurovia states that all commonly known asphalt and polymer-modified binders can be used as well as the addition of recycled asphalt.

The zeolites are framework silicates that have large vacant spaces in their structures that allow space for large cations such as sodium, potassium, barium and calcium and even relatively large molecules and cation groups such as water. In the more useful zeolites, the spaces are interconnected and form long wide channels of varying sizes depending on the mineral. These channels allow the easy movement of the resident ions and molecules into and out of the zeolite structure. The most well known use for zeolites is in water softeners. Zeolites are characterized by their ability to lose and absorb water without damage to their crystal structures. They can have the water in their structures driven off by heat and other solutions pushed through the structure. They can then act as a delivery system for the new fluid.