thanks Gabriel! I really appreciate the tippcPaul,I use epoxy resin from this guys,Bio seal 192, here is the link., it will answer most of your questions.regardsGabriel.E----- Original Message -----From: Paul CarrSent: Friday, February 15, 2002 1:52 PMDoes anyone know a formula to make syntactic foam with glass microspheres, epoxy resin and what ever else goes in such?