Preheat the oven to 250°F. Melt the butter and mix with the corn syrup and rum flavoring until blended.
Pour over the pecans and mix until evenly coated.
In a separate bowl, mix together the sugar and spice mixture. Toss with the pecans.
Spread on a parchment lined baking sheet. Bake at 250°F stirring every 15 minutes for 1 hour.
Spread on wax paper, and cool completely.
Store in a tightly covered container at room temperature for up to 2 weeks.