Well, that mostly depends on the qualities you’re looking for, but to give you a general overview, we’ll tell you our top picks. You can use a high-performance fast hardener if you’re short on time and want faster curing. This hardener is best for overnight curing at 55 degrees Fahrenheit.
Most commonly, medium hardeners work effectively for general applications and cure overnight at room temperature (77 degrees Fahrenheit). Lastly, slow hardeners are better-suited for warmer conditions and higher temperatures.