X0305 4 2012-05-14 0000740694 KAYDON CORP KDN 0001212607 ALEXANDER MARK A P.O. BOX 448 MONTVILLE NJ 07045 1 0 0 0 Common Stock 2012-05-14 4 P 0 10000 23.2177 A 21000 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.17 to $23.24, inclusive. The reporting person undertakes to provide to Kaydon Corp, any security holder of Kaydon Corp, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within this range. Includes 1,000 shares subject to restrictions and forfeiture. /s/ Mark A. Alexander, by Debra K. Crane, attorney-in-fact 2012-05-15