Mondur MRS 4 is a low to medium functionality polymeric diphenylmethane-diisocyanate (pMDI) with a moderately high 2,4 ’-MDI isomer content. Properties / Applications: Mondur MRS 4 has utility in a broad range of polyurethane applications including binders, elastomers, semi-flexible and packaging foams, polymer concrete, membranes and joint materials. As with any product, use of Mondur MRS 4 in a given application must be tested (including but not limited to field testing) in advance by the user to determine suitability. Information provided by Covestro |