Highly Insulating Neckdown Sleeves, a key choice for precision feeding in compact casting zones where thermal retention (not exothermic heating) is the priority.

Key Features:

• Neckdown Geometry
  • Constricted bottom section (the “neck”) controls the feeding path.
  • Promotes directional solidification and clean riser break-off
  • Concentrates heat and flow to critical casting zones.
• Highly Insulating Material:
  • No exothermic additives — uses only insulation to retain heat.
  • Maintains the riser in a molten state longer, feeding the casting effectively without chemical reaction.
  • Lower emissions and better workplace cleanliness
• Highly Exothermic Material:
  • Activates upon metal contact to create an exothermic reaction.
  • Keeps metal in the riser molten longer → enables effective feeding.
  • Reduces solidification speed in the riser compared to the casting.