R100 is a standard grade of Aliphatic Hydrocarbon Resin suitable for adhesives based on SIS.
M100 is a standard grade of Aliphatic Hydrocarbon Resin suitable for adhesives based on SIS.
K100 is a standard grade of Aliphatic Hydrocarbon Resin suitable for adhesives based on SIS.
A100 is a straight C5 (Aliphatic) Tackifying Resin. Its a General Purpose Grade suitable for Pressure Sensitive Adhesives (PSA) based on Natural Rubber.