Topog-E Gasket Co. offers "Plain Facts About Improved Gaskets and Hints on Boiler Maintenance," a booklet that emphasizes the safe operation of boilers with properly installed, no-leak rubber gaskets. The booklet covers boilers from research on rubber formulations to steam-safety pop valves. A pocket slide rule that can chart steam temperatures up to 380oF (193 oC) with up to 1,000 psi also is available.