Fill a large pot with 3 gallons cold water. Add seafood seasoning and 2 cups salt. Add potatoes, cover and bring pot up to a boil.
Meanwhile, cut kielbasa and corn cobs into 1-inch cross sections.
Once pot comes to a boil, plunge lobsters into the boiling water. Cook, 3 minutes, then add kielbasa and corn and cook until the potatoes are cooked through, the lobster is bright red and claws reach 155 degrees F and the corn and kielbasa are steamy and tender, another 5 minutes. Remove all ingredients to a large mixing bowl.
Add the butter, Cajun seasoning and the remaining 3 tablespoons salt. Toss in the bowl several times, and wow your guests by pouring the feast out on your table over newspaper or a washable tablecloth. Serve with wooden mallets and nutcrackers to open the claws and knuckles of the lobster.
This recipe was provided by a chef, restaurant or culinary professional. It has not been tested for home use.