Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

UpDate:
I was searching PM Research website...just looking at all the good "stuff" and stumbled on a solder kit!
   It is the Exact same formula. 96% Tin and 4% Silver plus liquid flux. In the description they state it is the solder they Recommend to there boiler kit and fitting customers...So it seems we got the "Right Stuff" thanks!!
PS: also states melt temp of 430 deg