NOTE: Only regular Palmer Mirro-Mastic® (Cat. No.'s PM201GL, PM205, PM601T, and PM601QT); CRL Heavy Bodied Mirror Mastic (Cat. No. 600GL), Palmer SuperSet (Cat. No. PM290), and Gunther Premier Plus Mastic (Cat. No. GN105P) may be used with Category II Safety Tape* that has been washed with 70 percent isopropyl alcohol (Rubbing Alcohol). Palmer Qwikset Mirro-Mastic®, Gunther Extra/Build, or Gunther Ultra/Bond are NOT to be used with any Safety Tape unless holes are cut out prior to applying mastic. *Gunther Premier Plus has only been tested and approved for CRL Brand Category II Safety Tape.