[UPDATE: DuPont said that the Chain Saver product "is nearly identical in formulation and any differences you are seeing are purely attributed to when the can was filled during the production run. So our dry, wax formula is not gone, it has simply changed to a yellow can."
We can only report the results we have found during our evaluations. In practice, the Chain Saver product differed from the Multi-Use Dry, Wax formula in 2009 and it appears different today from both the Multi-Use Lubricant and the latest Chain Saver formulation used for comparison.]
The newest versions of the Teflon Chain Saver spray cans we tried result in a lot of overspray and corresponding waste (see the video below). This seems different from when we first reviewed the product.
The Teflon Chain Saver lube does (sort of) become dry after a while, but it's nothing like the original Multi-Use Dry, Wax Lubricant with its "instant dry" feel.
DuPont says that Chain-Saver "Goes on wet and sets up to a clean, dry, wax film which will not absorb dirt or grime". It is claimed safe for O-ring type chains.
They also state that the product "is a dry, self-cleaning lubricant made to withstand high RPMs for a more efficient, longer-lasting chain. Grit and grime activate Chain-Saver’s 'self-cleaning' release agents, which shed dirt to reduce friction and help prevent failure. Chain-Saver’s no fling-off formulation also prevents oil splatters on clothing and wheels. The lubricant, which is enhanced with molybdenum and Teflon fluoropolymer for extreme pressure applications, is also designed for dirt bikes and ATV chains."