Steade wrote:
I have used some Ampreg 21 for the filling and surfacing jobs on my
Tri Gear. I am not very impressed.
Already after 7 months shelf life I had the crystalisation problem and
had to heat the resin as advised by Gurit (UK). Also the resin despite
post curing goes not seem to harden as well as Ampreg 20 and this
affects its ability to sand easily.
I did mix the resin accurately and this problem was consistent. over
several mixes. What its like for structural use I don't know.
I would be interested in anyone else's experience with this product.
I must say that for the filling I'm tempted to use West Systems 105
which I understand is OK for this purpose.
I can think of relative humidity and storage temperature as variables to
which Ampreg 21 may be more sensitive than Ampreg 20.
I have no experience with it.
After trial and error I now use SP106 for surface work (mixes as 1 to
0.18 by weight). Hardens and sands much better than Ampreg 20.
Regards,
Jan de Jong