Materials are provided that combine certain antimicrobial compositions with substrates to provide materials suitable for the packaging of food products such as meat products. In one aspect the present invention provides a material suitable for packaging that comprises (a) a substrate and (b) an antimicrobial composition comprising: (i) an active antimicrobial agent and (ii) a carrier wherein the antimicrobial composition has a viscosity of at least 50 centipoise at temperatures between 2° C and 12° C.
