Hey Frank ,
I may be able to help you here , but will PM you with details.
Incidentally mate , what is it for ? The only reason I ask is because we use that stuff for sealing B747 cockpit side windows . I don't somehow envisage that you'll be bowling along in a homebuild doing 550mph , but if that's what your project specifies , then so be it.
As a matter of interest , I restored an old Willys Jeep a couple of years back and needed to replace a smashed windscreen half . I sealed it with a fillet of black RTV which was squeezed into the channel of the windscreen frame . Was and still is perfect.
OK , I know that I've quoted ridiculous extremes here , what with one good for 550mph and my Jeeps top speed about 1/10 of that , but RTV is very user friendly stuff and easy to work with and PR1425 is bloody 'orrible stuff.
PM on way,,,
Rgds Chris