What does PR stand for in PR-1422? Or WS in WS8032S?

PR is the manufacturer’s acronym. It stands for PRC/PPG. Here are more acronyms for top sealant manufacturers and PMA sealants.

WS – Royal Adhesives now HB Fuller

NSL – NSL Aerospace PMA Sealants

Dapco – D Aircraft now Solvay

AC – 3M

PR – PPG/PRC

P/S – PPG/PRC

CS – Flamemaster