Fly ash from AEP’s Pirkey Power Plant, located
near Marshall, Texas, is being used as a filler in roofing
products. ISG Resources, Inc.,
the plant’s CCP marketer, is using the plant’s
fly ash for their patented product – ALSIL®.

Pirkey Fly Ash Used in Roofing
ALSIL® is a technologically
advanced industrial filler,
used not only roofing products,
but ceramic products and carpet/mat
backing as well.
The Pirkey Plant’s
fly ash as an ingredient of
ALSIL®, provides for:
- Improved heat transfer
- Spherical particle shape
- Low oil absorption
- Inert surface chemistry
- Opaque to UV light
- Lower manufacturing costs
- Superior asphalt protection
- Increased flexibility
- Reduced shrinkage
- Chemical resistance
- Thermally stable; will not oxidize like carbonate
- Tested excellent performance in reduced translucency