Can I use these capacitors?

[ble0t]

Here is the link to the capacitors:

1.0uF Metal Film

I am planning on using these in a a small circuit to power some LEDs off of an AC wall source (link to circuit schematic is here). My assumption is that they are non-polar (which is necessary for this circuit). Is this correct? Would there be any problem in using them or would an axial electrolytic be a better choice?

[Davet]

These are listed on the page you linked as metal film. They are non polar and should have less noise than an electrolytic.

The thing you should concern yourself with is the voltage required for the circuit. The voltage rating of the capacitor should be equal to or greater than than that specified for the circuit.

A more competeitive price and a broader offering of film caps may be had at http://www.digikey.com
if you are buying them via mail order. For immediate accessibility and convenience RS at the extras cost is worth it.

If noise is a concern in the circuit look at the Pansonic and polycarbonate or polypropylene capacitors at the above site. These are the lowest noise film caps in order polycarbs followed by polyprops.

[johnnyx]

I would use a "Class X" rated cap in this application. These are designed to be connected accross the mains supply for interference suppression, and are designed with safe failure modes. They will be much less likely to catch fire or explode if anything should go wrong.
They usually have paper insulation, Rifa make them, among others.