Long-Lasting Outside Insecticide

[fwc01]

Does anyone know the name of a long-lasting insecticide (repels and kills) that can be used against a broad range of pests (ants primarily)? That is, that will make it through rain and sun for some weeks. I believe what I am using now only lasts a week of so. Are the chemicals that Orkin and other firms use long-lasting? If yes, I wonder what they are using. Thanks.

[twelvepole]

Residual insecticides typically have to be reapplied after rain because rain washes them off surfaces. They are usually effective for several days. Sunlight, heat, and rain tend to render them ineffective. I would imagine the insecticide used by the pros have longer residual effectiveness. They spray once a month.