When do you apply a surface and penetrating conditioner?

A surface conditioner is typically applied when you want to enhance the appearance and protect the outer layer of a material, such as wood or concrete, from moisture and stains. In contrast, a penetrating conditioner is used when you want to nourish and protect the material from within, often applied to porous surfaces like unsealed wood. Both types of conditioners should be applied to clean, dry surfaces to ensure optimal adhesion and effectiveness. Always follow the manufacturer's instructions for best results.