OK, I don't use patches often because I don't like their inconsistent durability and I HATE nasty surprises as a categorical thing. The existing damage (volume of missing material, depth, surface area, whether there is "bridging" or not, etc.), together with the variability of a smoker's tooth arrangement and bite strength, makes how long a patch will last a crap shoot.
I understand that many people are OK with throwing those dice, though, for a number of reasons. I have no problem with that at all.
So, Stem Patcher Gamblers, here you go. The Secret Sauce you've been looking for. Other stuff works, but not nearly as well:
https://www.amazon.com/655-8-Pre-Thickened-Part-Epoxy-Adhesive/dp/B00LWKFZJ8/ref=pd_sim_200_3?ie=UTF8&pd_rd_i=B00LWKFZJ8&pd_rd_r=8V31KR81WDWRRED866WK&pd_rd_w=q4IHu&pd_rd_wg=N2XnY&psc=1&refRID=8V31KR81WDWRRED866WK
https://www.amazon.com/System-Three-3201A06-Pigment-Coating/dp/B003L0XE0E/ref=sr_1_3?s=industrial&ie=UTF8&qid=1475617340&sr=1-3&keywords=epoxy%2Bpigment%2Bblack&th=1
I understand that many people are OK with throwing those dice, though, for a number of reasons. I have no problem with that at all.
So, Stem Patcher Gamblers, here you go. The Secret Sauce you've been looking for. Other stuff works, but not nearly as well:
https://www.amazon.com/655-8-Pre-Thickened-Part-Epoxy-Adhesive/dp/B00LWKFZJ8/ref=pd_sim_200_3?ie=UTF8&pd_rd_i=B00LWKFZJ8&pd_rd_r=8V31KR81WDWRRED866WK&pd_rd_w=q4IHu&pd_rd_wg=N2XnY&psc=1&refRID=8V31KR81WDWRRED866WK
https://www.amazon.com/System-Three-3201A06-Pigment-Coating/dp/B003L0XE0E/ref=sr_1_3?s=industrial&ie=UTF8&qid=1475617340&sr=1-3&keywords=epoxy%2Bpigment%2Bblack&th=1