Aerosol products are hermetically sealed to prevent tampering and contamination. They conveniently deliver the exact amount of product needed, exactly where it is needed, without waste. They are ready-to-use and do not require the consumer to measure and mix. Aerosol products provide beneficial application forms not achievable with other product types, such as thick and luxurious shave foams. They also promote human health in products such as sunscreens, repellants for disease-carrying insects, and metered-dose inhalers.