Hello,
I have waxed the top ends of cuttings, especially those that are more freshly cut, thinking that it might seal the ends, limiting critical moisture from escaping. I made up a mixture of paraffin, linseed oil and I think bees wax was in the mix. It is softer than regular candle wax. This mixture did not affect the growth of my cuttings and if a bud was covered with the wax, it pushed right through it.
The wax in the pictures above appears to be the very soft wax used to seal toilets. I did not use this because it stuck to plastic bags, otherwise it looks good.
Ingevald