Abstract: This invention relates to a method of making transparent laminated windows with a minimum of opacity problems that may result from adhering preformed polyurethane sheeting to acrylic or polyurethane sheeting that constitute components of said transparent windows. The preferred embodiment of the invention comprises applying a dilute solution of up to 5 percent by weight, preferably 1 to 4 percent and most preferably about 2 percent, of finely divided particles of a polyurethane in an organic solvent in which it is highly soluble. A preferred solvent is chloroform. A preferred polyurethane composition is a polyesterurethane that is the reaction product of (a) a polyester having the ester linkage ##STR1## and a pair of groups reactive with isocyanate or isothiocyanate groups; (b) a diisocyanate, disisothiocyanate or a compound containing an isocyanate and an isothiocyanate group; and (c) a compound containing at least two active hydrogens per molecule reactive with isocyanate or isothiocyanate groups.