The Gunstock impregnated with VCI is a patented product designed to combat corrosion. Oxygen, moisture and condensation in the air can quickly corrode a gun. VCI Gunstock establishes an invisible barrier around your gun which virtually eliminates any chance for water or oxygen to react with the metal. VCI penetrates deep into the tiniest cracks and crevices that oils can't reach to neutralize the effects of water and oxygen. The VCI Gunstock slowly releases compounds within a sealed airspace to create an invisible barrier a few molecules thick that actively prevent surface corrosion.