These are the products on a basis of bitumen covering consisted of modified asphalt with an elastomer SBS, mineral filler and mineral surface. The warp of the membrane is a glass fibre veil and polyester mat. The bottom part of modified membranes is covered with plastic foil.

The advantages of such papers are high resistance to high and low temperatures and in case of membranes on a basis of polyester mat the highest among all membranes produced by IZOBUD Sp. z o.o. deformation.