Rubber, Tires, Foam & Elastomer Manufacturing worked example

Seal Molding Cost at 99% first-pass yield: a worked example

Push first-pass yield up to 99% and the picture changes. This example computes every intermediate figure at that operating point. An estimator uses it to quote a compression or injection seal molding run for a given annual volume.

The inputs for this scenario

  • Seals Molded: 5,000 pieces (unchanged)
  • Molded Cost per Seal: 0.42 $/piece (unchanged)
  • First-Pass Yield: 99 % (raised for this scenario; the documented default is 96)
  • Mold Setup & Cure Charge: 320 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Seal molding cost = seals x cost per seal x first-pass yield% + setup/cure charge) to the inputs above produces each figure below.
  • At this operating point the engine returns 2,399 $ for total seal molding cost, the number this scenario is built around.
  • At this operating point the engine returns 0.48 $ / piece for seal molding cost per unit.
  • At this operating point the engine returns 2,079 $ for variable seal molding cost.
  • At this operating point the engine returns 320 $ for fixed seal molding cost adder.

How this compares with the baseline

  • Against the tool's baseline example, where first-pass yield sits at 96% and the headline result is 2,336 $, this scenario comes in 2.7% above the baseline at 2,399 $.
  • It multiplies seals by molded cost per seal and by first-pass yield to get the variable cost, adds the fixed setup and cure charge, and divides by piece count for a per-seal cost. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.

Results at a glance

  • Total seal molding cost: 2,399 $ (headline result)
  • Seal molding cost per unit: 0.48 $ / piece
  • Variable seal molding cost: 2,079 $
  • Fixed seal molding cost adder: 320 $

Run it with your numbers

  • Every input above is editable in the live Seal Molding Cost calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.