Blaster Blaster foam?

Does anyone know for sure if there is any expandable foam in a B1 hull. The type of foam that’s in a super jet under the foot tray that can get waterlogged. I’m wondering if there’s any of that type foam around the jet intake or rear step deck? Or maybe some foam behind the midshaft bulkhead? I have some very small hairline cracks about an inch away from where my pump Mounts underneath the rear step platform. The cracks are super small but I’m wondering if there’s a chance that the cracks can take on water there and the ski become waterlogged? Has anyone else encountered these small cracks?
 
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