The Birchwood Gels make it easier to achieve an even patina and work well on vertical surfaces. One gallon of a Birchwood Gel Patina generally covers 200 sq. ft. per coat. They are available in 8oz., 32oz., 1 gallon, and 5 gallon sizes. The Birchwood Gel Patinas are not concentrated and are ready to use.
Gel solutions for Bronze, Brass, and Copper: Antique Black Gel (M-24). Antique Brown Gel (M-38).
Gel solution for Iron and Steel: Presto Black Gel (PC-9).