Coremat is a nonwoven polyester that contains microspheres and is used primrily as a bulker mat or liner in composite laminates  that have been  made using a hand lay-up or  Vacuum Infusion as the means of production. Coremat should always be fully saturated with resin. The microspheres contained  in the Coremat will prevent excessive resin up-take. 

Coremat  sets the standard for bulker mats. Resin consumption for coremat is approximately 600 grams per of mm thickness. It also utilizes a resin indicating compound that changes color showing that resin has been applied to the Coremat.

Coremat  is very soft and pliable when it is wet is suitable for use within complicated shapes or molds