pre-impregnate
/ˌpriːɪmˈprɛɡneɪt/Manufacturing Technology
verb
[with object] To impregnate (a material) with a substance prior to further processing; specifically to impregnate reinforcing materials with synthetic resin before use.
Origin
1950s. From pre- + impregnate. Compare earlier pre-impregnated, pre-impregnation.