I cant comment on IBA but worked at a friction tunnel about 10 years ago that ran Qual Chem, changed to Lustra due to some challenges with the Qual Chem distributor (according to the owners) but we were putting out a very good car with Qual Chem, their product range seems to have changed these days but I think the product was called hydropel that we used as a sealant, would get a bead on pretty well any car, even very neglected vehicles.