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You could but... EXPENSIVE. Make your own.
here is the forumula from one of our PRO Members...OOPS cabosil....glass bubbles and 1/4 inch glass fibers.....mixed with resin mix it up REALLY well NO LUMPS! after its mixed up good....then add the catalyst.....according to the amount of resin you added....between 1.5% to 2.5%...no more....no less It should be the consistency of Mayonaise or Creamy Peanut butter. www.uscomposites.com is a GREAT source for your materials