Zwaluw Backer Rod PU is a round open (polyurethane) foam rod used to fill joints between building materials to make sure the joint sealant will reach its correct dimension in width and depth. Zwaluw Backer Rod PU is supplied in various diameters.
Great service. Delivery was done the next business day. Prices on products that I have wanted or looking for great as well. Will continue to purchase from them.