As you ride, Dumonde Tech Original Bicycle Chain Lubricant forms a low-friction plastic plating which bonds to the chain and drivetrain components. This allows your parts to last longer and run quieter than what you'd get from any other lubricant. It comes in two concentrations. This Dumonde Tech Original is more viscous than the Lite, even though they have the same formulation. Not to worry if you normally use one or the other, the two Dumonde Tech Lube formulas are compatible and may be used interchangeably. Dumonde Tech Original is more concentrated than the Lite and excels in the most challenging conditions. We use it on our mountain bikes and for the road bike when the road and weather conditions promise to be poor. A coating of the thicker Original is more durable than the Lite, so it generally requires less frequent applications. To get the best results from Dumonde Tech Lubes, first degrease your chain and dry it thoroughly prior to the first application. This effectively primes the surface for the "plating" effect that makes the lube so successful. For the first application, we recommend putting one drop on each link to really aid the plating effect, wiping the excess from the chain after it has had time to work itself into the pins. When your chain begins to get noisy, it's time to reapply. Use soap and water to clean the chain prior to re-application -- strong solvents and degreasers will remove the protective plastic plating from the chain, putting you back at square one. This Dumonde Tech Original Bicycle Chain Lube comes in a 4oz bottle that should last for 40 or so applications.