The VGC system is a two-component, vinylester based adhesive contained within a glass capsule. The capsule is placed in the hole and the resin and initiator components are combined when the rod or rebar is driven to the bottom of the hole through the capsule. SPECIAL FEATURES Fast cure. No special tools required for use. Hammer-in or spin-in (if desired). Pre-measured amounts for listed embedment and load - NO WASTE. Capsules are bi-directional - either end can be inserted into the hole first.