Minwax Gel Stain is an **oil-based** product. To prepare wood surfaces, you should use the standard **Minwax Pre-Stain Wood Conditioner** (oil-based version). **Important:** Do not use the water-based version of the conditioner, as it is not compatible with oil-based stains. Using the correct conditioner helps prevent streaking and blotching, especially on soft or porous woods.