Need speedy first aid on the jobsite? WoundSeal stops bleeding instantly and forms a waterproof, protective scab, its manufacturer says.

A hemostatic agent comprised of a hydrophilic polymer and potassium ferrate, WoundSeal is the same powder, the company says, that’s been used in hospitals and by sports trainers for several years. Pour the powder onto a cut while it’s still bleeding and apply light pressure, and the bleeding will stop. The resulting “instant scab” protects the wound and falls off as it heals.

It’s available nationally through occupational health and first aid suppliers as well as at Walgreens, Rite Aid, CVS, and other retailers (see a complete list at the company’s website).

Prices start at $1.75 per packet.

Biolife, 800.722.7559,

Scott Gibson is a writer in East Waterboro, Maine.