MuShield heat treats parts & materials on-site With every magnetic shield MuShield manufactures, the Company's goal is to attain the maximum shielding capacity or permeability for that part while maintaining its dimensional and structural integrity. MuShield meets these objectives by heat treating parts and material on-site. Does MuShield provide heat treatment services for parts other than its own? Absolutely. MuShield has a large heat treating capacity and remains committed to investing in additional equipment to keep up with the demand for these services. Fast turn around of heat treated parts is critical to MuShield customers.