The Pro-Fix 20/20 Long Cure is a toughened medium-viscosity impact resistant epoxy that has a work time of 20 – 30 minutes and is playable within a 20 hour cure forming a toughened off white bond. It was developed with impact resistance and durability as its major component and has shown outstanding performance and versatility. If you can wait for this epoxy to cure you will have an excellent aerospace quality bond at an affordable price. It has superior structural properties with very high impact resistance and provides excellent adhesion on steel, graphite, titanium, and composites shaft types. With a full performance from -50F to 180F, is very easy to use with a mix 1:1 ratio by volume of bottles A and B, and has easy cleanup. Golfers with swing speeds over 100 mph can add glass shafting beads to increase the structural strength of the bond.