Rice husk has several advantages such as the ability to withstand humidity, nonflammable, it is not easy to mold, odorless and others. Utilization of waste rice husk is still a big chance to be used as an engineering material. By adding an inexpensive adhesive, rice husk has the potential to be engineered into flexible core product for the manufacture of composite sandwich panels. The purpose of the research conducted are: (1) Determine the influence of bending strength on the variation of the volume fraction of rice husk of Composite rice and bermatrik urea formaldehyde with the hot press at 60 ° C for 24 hours, (2) Determine the influence of tensile strength on variations the volume fraction of the rice husk and rice husk composite bermatrik urea formaldehyde with the hot press at 60°C for 24 hours and know the results of the test structures on the bending and tensile testing with macro photos. The research method is done by testing bending and tensile with a volume ratio of rice husk Vf = 40%, 50%, 60%, 70%, and urea formaldehyde Vm = 60%, 50%, 40%, 30%, test results obtained (1) the most optimal bending test is 5mm thick specimen with Vf = 40% of 2.73 MPa, (2) and most optimal Impact test specimen thickness is 5 mm, and Vf = 40% in the amount 0,34MPa.