To make concealer waterproof, you can mix it with a small amount of a waterproof setting spray or a silicone-based primer. This will help the concealer adhere to the skin and create a waterproof barrier. Additionally, you can also set the concealer with a waterproof setting powder to further enhance its staying power. It's important to blend the products well and allow them to dry completely before coming into contact with water. **

A full-coverage concealer is best for covering scars. Look for a concealer that is highly pigmented and has a thick consistency to effectively camouflage scars. Additionally, choosing a concealer that matches your skin tone closely will help blend the scar seamlessly with the rest of your complexion. It's also important to set the concealer with a setting powder to ensure long-lasting coverage. **

The longevity of a concealer depends on various factors such as skin type, application technique, and the specific formula of the concealer. However, in general, long-lasting concealers often have a matte finish and are formulated to be transfer-resistant and smudge-proof. Look for concealers that are labeled as long-wearing, waterproof, or sweat-resistant for extended wear. Additionally, setting the concealer with a translucent powder can help to increase its longevity. **

I recommend the MAC Pro Longwear Waterproof Concealer for the swimming pool. This concealer is specifically designed to be long-lasting and waterproof, making it perfect for staying put even in water. It provides full coverage and is resistant to sweat and humidity, making it an ideal choice for swimming. Additionally, it comes in a variety of shades to match different skin tones. **

A concealer typically lasts for about 12-18 months after opening, depending on the specific product and its ingredients. However, it's important to pay attention to any changes in the texture, smell, or color of the concealer, as these can indicate that it has expired and should be replaced. Proper storage and hygiene practices, such as keeping the product tightly closed and avoiding contamination with fingers, can also help extend the shelf life of a concealer. **

The Tarte Shape Tape Concealer is known for providing long-lasting and good coverage. It is a full-coverage concealer that is designed to last all day without creasing or fading. It is also highly pigmented, so a little goes a long way in covering imperfections and dark circles. Additionally, it comes in a wide range of shades to suit different skin tones. **

The time it takes to finish a concealer can vary depending on how often it is used and the amount applied. On average, a typical tube or pot of concealer can last anywhere from 3 to 6 months with regular use. However, if used sparingly or infrequently, it could last even longer. It's important to pay attention to the expiration date and signs of product degradation to ensure the concealer is still effective and safe to use. **

Concealer typically lasts for about 12-18 months, but this can vary depending on the specific product and how it is stored. Similar products to concealer include color correctors, which are used to neutralize specific skin discolorations, and foundation sticks, which provide coverage for blemishes and imperfections. Tinted moisturizers and BB creams are also alternatives to concealer, as they provide light coverage while also hydrating the skin. **