Avalanche Black Diamond, 12.3oz (Green Can) California. UV Dye Leak Detection with Smart Clips. UV dye leak detector allows easy leak detection with special dyes that glow when exposed to UV light. Easy to Use Vent Clips change to blue andgreen to show correct refrigerant fill and prevent overcharging. No gauge required. System safe chemical additive stopsleaks in o-rings and other rubber components where most common leaks begin.