NL Industries announced that its board of directors has declared a special cash dividend of 43c per share and a quarterly dividend of eight cents 8c per share, in each case on its common stock. The special dividend, which is being funded from excess cash flows, is payable on August 29 to shareholders of record at the close of business on August 19. The quarterly dividend of 8c per share is payable on September 24 to shareholders of record at the close of business on September 6.