Farnam Wound - Kote Blue Lotion Spray is not labeled for use on humans.
Per the product label, Farnam Wound - Kote Blue Lotion Spray can be applied to surface wounds, minor cuts and skin abrasions, harness galls, and saddle sores, on horses, ponies, cattle, and dogs.
Farnam Wound - Kote Blue Lotion Spray is labeled for use on minor cuts, skin abrasions, surface wounds, harness galls, and saddle sores. We would recommend reaching out to your vet to confirm if it is advisable to also use on a calf with sunburned skin, or the manufacturer directly, 800-234-2269