I have used them.
They are great!! Best water seal, by heat shrink, I have seen.
I have 3 types of crimp, heat shrink, seal that work good too.
The key to meeting ABYC standards is you
can't rely on the solder to mechanically hold the wire stress.
_______
I have always preferred solder for all electrical connection.
So I bought them. It took about 6 months to get them in 2015.
Plus I had to buy a
heat gun, which is really needed for a good shrink/seal of any type.
Story...
My son-in-law the electrician [who is Electrical repair on 20 Gulf Oil Platforms] has always used crimps. He was installing a new Tank Level transmitter on my boat. He pops out of his service tool bag, his box of heat shrink crimp type
reds.
I showed him my new ones that solder.
I said, lets try these solder one. Well ok
to humor me.
Procedure...
1) Clean both wires
2) Slide on the new solder type butt connector.
3) Mechanically twist the pair. 3 wraps like all landlubber soldering.
4) Position the solder joint over the twists
5) Apply heat gun at solder joint per instructions. About 3"inches away on high setting, moving left/right.
6) Watch the solder melt and wrap seal [100%] at same time.
7) Done. Plus my son-in-laws facial expression was priceless.
So he proceeds to tug on the connection, his normal crimp test. Nothing happened.
He was definitely impressed.
That instrument wire has
no mechanical stress on it.
I plan to use the solder type, when needed.
_____
BTW there was a big discussion on this in a previous SBO thread. I showed the ABYC standard that allows solder, if no mechanical stress reliance.
Jim...
PS: This is the ones I ordered
https://www.amazon.com/gp/product/B00KU0V586/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
50 piece not 100
PSS: After watching the video above, I would never use my greasy fingers to press the wires together.