Adults and children over 6 months:

Apply sufficient lotion to cover dry hair from the base to the tip to ensure that no part of the scalp is left uncovered. Work into the hair spreading the liquid evenly from roots to tips.

Allow hair to dry naturally.

Leave on hair for a minimum of 8 hours or overnight.

Wash out with normal shampoo, rinsing thoroughly with water.

Repeat treatment after seven days.

Children under six months should only be treated under medical supervision.

Room temperature

Dimeticone 4% w/w

https://www.medicines.org.uk/emc/files/pil.4901.pdf