We are trying to determine if there are any issues with using standard firestop sealants such as STI LCI-305 or Hilti CP606 to air seal the exterior of electrical outlets. Looks like the stuff will shrink but is it enough to compromise the air seal ? Can anyone suggest an alternative product or method for air sealing outlets in a min. 1-hr rated partition wall ? The Hilti 601 product is elastomeric but costs a fortune, there must be an alternative. Thanks !