Has anyone got any experience with using cork as a core?  Several kayak manufacturers have started using it recently and was wondering if anyone has any experience with it as a material for both vac bag and infusion?

I have just infused a test sheet using ordinary thin (3 mm) floor "anti-sound" cork sheet... not very uniform in thickness, and a bit porous, but very cheap.

I will test it in a few days, when fully cured.

1 layer of 375 gsm Satin weave CF + 1 layer 200 gsm twill  on both sides.

I did three strips:  1 floor-cork, 1 Soric and 1 3D-core   All 3 mm. 

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