In a large bowl, toss the cucumber slices with the salt. Let the cucumbers stand for about 2 hours to release moisture and drain.
In another bowl, combine the salted cucumbers, garlic cloves, dill and dill seeds, chopped red pepper, sugar, and vinegar. Refrigerate the mixture for a few hours so the cucumbers have a chance to absorb the flavors of the brine.
Remove the bowl from the fridge. Pour the cucumbers and brine in freezer bags or containers and store in the freezer. Thaw the pickles for about 8 hours in the fridge before serving.