TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Component: The optically detectable portion of the interlocked particles includes optically detectable particles that are transverse to the opposed parallel planar surfaces of the flexible graphite body. Preferred Dimension: The article has a thickness of 1-0.003 inch. Preferred Property: The article has a density of 5-125 lbs/ft3. The graphite density before compression is 0.08-0.8, preferably 0.08-0.5 g/cc. The graphite density after compression is 1-2.2 g/cc.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Component: The optically detectable portion of the interlocked particles includes optically detectable particles that are transverse to the opposed parallel planar surfaces of the flexible graphite body. Preferred Dimension: The article has a thickness of 1-0.003 inch. Preferred Property: The article has a density of 5-125 lbs/ft3. The graphite density before compression is 0.08-0.8, preferably 0.08-0.5 g/cc. The graphite density after compression is 1-2.2 g/cc.    TECHNOLOGY FOCUS - POLYMERS - Preferred Method: The method further comprises mechanically deforming a surface of the continuous flexible graphite sheet to provide a series of repeating patterns on a surface of the flexible graphite sheet or the removal of material from the flexible graphite sheet in a series of repeating patterns. The liquid resin is admixed with a solvent and the solvent is at least partially vaporized prior to mechanically deforming a surface of the continuous flexible graphite sheet. Compressing further includes forming a pattern in at least one of the planar surfaces. The method further comprises the step of filling 70-95% of the pores on a volume basis with the resin sealant. A free radical initiator is provided to initiate cure of the resin sealant. Selecting the resin sealant further comprises selecting a curable poly(meth)acrylate ester of formula H3C=C(R2)-C(=O)-O-((CH2)m-((R1)C(R3))p-(R1)C(R1)-(O))n-C(=O)-C(R2)=CH3. It further comprises selecting a monofunctional acrylate ester from lauryl methacrylate, cyclohexylmetharylate, tetrahydrofurfuryl methacrylate, hydroxyethyl acrylate, hydroxypropyl methacrylate, t-butylaminoethyl methacrylate, cyanoethylacrylate, and/or chloroethylmethacrylate.R1=H, 1-4C alkyl, 1-4C hydroxyalkyl, or -O-C(=O)-C(R2)=CH2;R2=H, halo, or 1-4C alkyl;R3=H, OH, or -(CH2)k-O-C(=O)-C(R2)=CH3;m=0-12;n=greater than or equal to 1;k=1-4;p=0 or 1.Preferred Component: The free radical initiator includes a heat-curing initiator to produce free radicals by thermal decomposition to cure the resin sealant. It is peroxide, hydroperoxide, perester, or and/or azonitrile. It includes an anaerobic-curing initiator to produce free radicals upon the exclusion of oxygen to cure the resin sealant. The anaerobic-curing initiator is a peroxy initiator from hydroperoxides, peroxides, and/or peresters. It includes an anaerobic accelerator from tributyl amine, benzoic sulfimide, formamide, and/or copper octanoate. The resin sealant is a phenolic resin, a vinyl resin, a silicone resin, an acrylic resin, and/or an epoxy resin.