What Is Castile Soap? | Allrecipes- castile liquid soap in cambodia ,Use Castile soap for beauty and personal care. Castile soap is ideal for travel, because it's an all-in-one shower product. Use it as face wash, body wash, shampoo, and shaving cream. You can also add a tablespoon to a bowl of steamy water and breathe in to help clear congestion.Dilutions Cheat Sheet for Dr. Bronner's Pure-Castile SoapDIY Liquid Hand Soap. Ingredients 1/2 cup castile soap liquid 1/2 cup distilled water 1 TB vitamin E oil (optional) 1 TB sweet almond oil or olive oil or jojoba oil (optional) 15 drops tea tree essential oil (optional) 5-10 drops lavender essential oil (optional) Instructions