is in progress. There have been a lot of questions about this product, generically called Pro Seal, but most likely everyone is using Flame Master. Anyway...
My buddy building an RV10 had some PS left over, expires this month. I used it to attach a NACA duct on my 8. (My stock of PS expired in... 2010.) So I decided to find out if the old stuff would still "kick" off.
The just expired PS/activator set up, even in a hangar running about 40 degrees, though it took several days.
The just expired PS, using old 2010 activator, was not tacky after several days in the same conditions. It was not as firm as the previous example; it was the same color
The 2010 PS, using new activator, was still tacky after the same period of time in the hangar. It was definitely a lighter grey in color.
All samples were brought into a climate controlled 70 degree environment. After a day there the second sample (just expired PS/old activator) was very close to the newer PS in texture; I would use it on non-critical jobs like the NACA duct.
The third sample (2010 PS/new activator) is no longer tacky. It has a soft, rubbery consistency.
Will report any changes that occur over time.
My buddy building an RV10 had some PS left over, expires this month. I used it to attach a NACA duct on my 8. (My stock of PS expired in... 2010.) So I decided to find out if the old stuff would still "kick" off.
The just expired PS/activator set up, even in a hangar running about 40 degrees, though it took several days.
The just expired PS, using old 2010 activator, was not tacky after several days in the same conditions. It was not as firm as the previous example; it was the same color
The 2010 PS, using new activator, was still tacky after the same period of time in the hangar. It was definitely a lighter grey in color.
All samples were brought into a climate controlled 70 degree environment. After a day there the second sample (just expired PS/old activator) was very close to the newer PS in texture; I would use it on non-critical jobs like the NACA duct.
The third sample (2010 PS/new activator) is no longer tacky. It has a soft, rubbery consistency.
Will report any changes that occur over time.