Thanks for your responses and the information. FWIW, I had spoken with Henkel Loctite and according to them, they produce no products which are both oxygen compatible and breathing gas compatible. They steered me to Fluoramics, the makers of LOX-8, which is oxygen and breathing gas compatible...
I am building a blending station for mixing SCUBA breathing gases. The system will handle pure oxygen and helium at up to 2500 psi and Nitrox II (air with reduced nitrogen (@68%) and increased oxygen (@32%)) at pressures of up to 4000 psi. The manifolds are machined brass and the fittings...
