Alcupol C-5521 Polyether polyol Repsol PU - Polyols >> Polyether SEALANT ADHESIVE Alcupol C-5521 is a reactive trifunctional polyolether with a molecular weight of 3000 and it is capped with ethylene oxide. It is recommended for the production of filled and unfilled elastomers, sealants, adhesives. Reactive trifunctional polyolether finished capped with ethylene oxide. Recommended for the production of filled and unfilled elastomers, sealants, adhesives.