Durham's Rock Hard Water Putty, 1 lb. is a durable plastic repair material that comes in powder form and is designed to be mixed with water for easy application. This versatile putty will not shrink and can be used on a variety of surfaces including walls, floors, furniture, woodwork, or plaster. It hardens quickly within 30 minutes, providing a strong and lasting repair. The putty can also be colored or painted to match your project’s finish, making it an i choice for both functional and aesthetic repairs. Model Number: RHWP1