The Floetrol Flood Gallon Paint Conditioner is a potent and oil-based conditioner perfect for improving the overall coverage of most paints. It prolongs the wet edge of the paint, which gives you the time to craft the look you want or rectify your slip-ups without any problem. Suitable for interior and exterior latex paints. Besides, it also allows the paint to become weather-proof and undergo extreme hot and cold temperatures or high humidity. The total capacity of the product is about 1 gallon. It is not thinner.