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A lot of people put electrical tape on the ends and at Y’s of convoluted split tubing to keep the wires addressed. But even with high quality tape, heat tends to melt the adhesive, leaving a mess. So I have this tip that has been working for me.
I first tape the tubing. Then, I take Liquid Tape and paint over the electrical tape, all around the taped joint, especially where the tape seam is. A second coat doesn’t hurt. This stuff dries super quick, looks great, and keeps the tape intact.
I've used this process on connections inside electric motors that have vented end covers and it works great. No sparks flying out when running the motors super hard.