A proprietary seal formulation with ingredients that are FDA compliant for food contact. More sealing power, including 14% more contact area to ensure seal fits on all jar sizes, 24% more sealing material by weight, and 25% more sealing material by volume to facilitate seal integrity.
Distinctive “pop” feature provide audible and visual assurance of seal integrity. Calibrated to meet FDA psi vacuum standard sfor home canning.
Five layers of corrosion protection, and three layers of interior protection, including a food grade electroplate, BPA free base coat, and a BP free top coat.