A lot of kink folks will take the wax from the religious candles and re-purpose them for a different sort of activity.
You want candles that have a low heat. So no candles made of beeswax, for example.
Another "trick" you can use is if the wax is softer, you can use your nail to check a religious candle for a good example, generally it means that the heat is less.
Most of the massage candles are crap.
But the Kama Sutra brand has always been a very workable massage candle. And there used to be this massage candle that was the absolute best but it's no longer being made. I've wasted a whole lot of funds on trying to find the best type of candle to use.
I've gotten burned with candle play on the breasts (tried different types of votives. Ouch!) and so it's good to see that the ladies here are searching for better options.
Here is a link to one type of Kama Sutra candle (they have a few different scents. I always liked the almond one!):
https://www.amazon.com/Massage-Kama-...massage+candle