Welcome to Combo Aluminum Products

Since 1959, Combo has been dedicated to providing the highest quality and most innovative products in the industry. From developing the first commercially produced combination sill threshold, or Combo-Sill, our product line has expanded to include a wide variety of products including door bottoms, residential and commercial thresholds, adjustable and water return bumper sills and thresholds, as well as astragals and fire/smoke gaskets and more.