Bondex is a patented, proven formula that can be used safely and effectively instead of a primer. It provides a maximum strength bond between the natural nail and acrylic products. It virtually eliminates lifting and dramatically reduces the need to nip back old acrylic during fills. Acrylo/Keratin Bonding Agent, the proprietary ingredient in Bondex, makes natural nail Keratin compatible with acrylic for a strong, even bond. Replaces all primers. Bondex can be used in conjunction with any conventional liquid and powder system.