Chemical Guys Leather Protectant Serum coats, conditions, and protects leather seats, upholstery, and goods. Normal wear and tear, harsh UV sunlight, and improper cleaning makes leather feel dry, look faded, and even causes it to crack and break. Leather Serum is a unique protectant that restores a soft supple feel to leather, and protects against fading from harsh UV rays and light stains from normal use. 16oz.