Adrian, looks like you're in luck, there's a rocketry forum post where a
guy gives a brief review of this exact product:
http://www.rocketryforum.com/showthread.php?74822-Rectorseal-EP-400-Epoxy-Putty-Works-Great!
On Tue, Jun 7, 2016 at 9:41 AM, Adrian P. Bailey <adrian@xxxxxxxxxxxxxxx>
wrote:
Has anyone used Rectorseal Ep-400 Epoxy Putty, or have other
recommendations? I’m looking for something that Amazon can deliver today… ;)