NBPol-940(Carbomer 940) NBPol-980 is a polyvinyl carboxy polymer used as a viscosity enhancer, gelling agent, or suspension agent. It is cross linked with ethers of pentaerythritol, and is used primarily in systems where sparkling clarity or a sharp viscosity response is required. NBPol-940(Carbomer 940) NBPol-980 stands high on effectiveness, safe usage and optimum quality.