From what I understand (**disclaimer - I am not a chemist**) the polymers in plastics and vinyls consist of Bis-(2-ethylhexyl)phthlateakadioctyl phthlate, also known as DOP. This is a plasticiser that makes polymers soft and pliable. It evaporates when exposed to UV light.

The arguments against Armour All are as follows:

*Armour All brings the DOP to the surface and allows it to evaporate quicker.
Many studies show this is true, while others show that this is not the case, so I guess this needs further testing.

*Armour All doesn't block UV, thus allowing the DOP to evaporate.
This is true as far as I know.


*Armour All does not seal the DOP, nor replace it.
This seems to be true also.

Conclusion: Using Armour All will not protect your rubber pads from exposure and *might* increase the evaporation rate.

303 Aerospace Protectant has UV blockers and is not oil based so it will not dry out the surfaces it is used on.