Rubber desiccant? Rubber desiccant? tom1953 (Chemical) (OP) 21 Aug 12 10:25 I know calcium oxide is very commonly used as a desiccant in rubber compounds, but I can't use CaO. Are there other desiccants that can be used? Thanks, tom RE: Rubber desiccant? GrahamBennett (Materials) 22 Aug 12 11:58 Not that I know of Tom. Why can't you use CaO? RE: Rubber desiccant? tom1953 (Chemical) (OP) 22 Aug 12 12:44 It adversely affects the curing of millable polyurethanes. RE: Rubber desiccant? GrahamBennett (Materials) 24 Aug 12 10:45 Oh. Thanks for that Tom. I didn't know that. RE: Rubber desiccant? MPEngineer (Aerospace) 24 Oct 12 19:13 Have you checked with your supplier? They might be able to suggest an alternative. RE: Rubber desiccant? willows1 (Chemical) 19 Nov 12 05:36 Have you tried MgO? Sometimes it can be used as desiccant because of his hygroscopic nature.