Cadox M-30a clear, M-50a clear and vanishing red catalyst is Methyl ethyl ketone peroxide solution in plasticizer for use with Hand lay up, spray up Polymer concrete, marble and Centrifugal Castings. <br> Cadox L-50 clear, L-30 Clear and vanishing red catalyst is Methyl ethyl ketone peroxide solution for use with Gel coat and Vinyl Ester resin applications. <br> <br> Please call our office if you have any questions