My #1 choice for a dry lubricant.
 SILCA Super Secret Chain Lube delivers all the speed and quiet operation of a hot-wax immersion chain, but in a drop-applied format (all the benefits, none of the hassle!). Secret Chain Lube also uses the world’s fastest-acting, most lubricating additive, nanoscale tungsten disulfide. NanoPlatelet WS2 has less than 1/3 the dynamic coefficient of friction of PTFE and 1/4 the dynamic coefficient of friction of molybdenum disulfide (MoS2).