No; they get too hot!! However, RBI has one that Rich writes does not need a t'stat: "Ultratherm Vivarium Heaters have been manufactured in Scotland for over 20 years to exacting European Standards. UL Listed component.
These pads can often be used WITHOUT a thermostat due to their low wattage density. The element is similar to the Flexwatt heat tape but it is a far more durability...". The web site is: http://www.reptilebasics.com/Ultrath...p-1-c-273.html
You could call or email him for the particulars; I have not used this product, though I might one day...