What puts prepreg on a freezer-life watch?

Time outside the freezer accumulates against an out-time allowance, and time in storage counts against shelf life. When either limit is in question, the lot value is at risk.

How is the per-pound exposure calculated?

Total exposure divided by the at-risk weight. At the defaults, $3,026 across 28 lb is about $108.07 per pound, and that includes the fixed retest cost.

Does this say the prepreg is unusable?

No. It prices the exposure while the decision is open. Usability still depends on a retest against the material specification or the supplier's advice.

Why spread a fixed cost over the weight?

The retest and quarantine cost does not scale with weight, so spreading it over the at-risk pounds raises the per-pound exposure most on small lots.

Composites, Fiberglass & Advanced Materials calculator

Material Freezer Life Exposure Calculator

Value the frozen prepreg whose freezer life or out-time allowance is in question and add the fixed retest and quarantine cost. The per-pound figure shows how much of the lot value each pound carries.

What this calculator does

Dollar exposure from frozen prepreg whose freezer life or out-time allowance is in question, plus a per-pound view.

Formula used

Material value at risk = at-risk weight × prepreg value × scope included ÷ 100
Total exposure = material value at risk + retest and quarantine cost
Exposure per pound = total exposure ÷ at-risk weight, blank when the weight is zero

Inputs explained

At-Risk Prepreg Weight: Frozen prepreg whose freezer life or out-time is in question.
Prepreg Value: Replacement cost per pound for the at-risk prepreg.
Scope Included: Share of the at-risk lot value carried in this exposure.
Retest and Quarantine Cost: Fixed retest, quarantine and disposition cost for the lot.

How to use the result

Best suited to auditing freezer logs and out time, deciding whether to retest or scrap, pricing a material expiry finding.
The exposure is a cost estimate, not a statement that the material failed. Out-time and freezer-life limits differ between material systems.

Current U.S. benchmarks

The producer price index for plastic resins and materials stands at 280.569 (BLS, Aug 2026), up 6.6% from a year earlier. Quotes priced off last quarter's material cost miss this move.
Steel mill PPI stands at 381.162 (BLS, Aug 2026), up 23.4% from a year earlier. New factory orders are up 8.5% year over year (Census).

Common questions

What puts prepreg on a freezer-life watch? Time outside the freezer accumulates against an out-time allowance, and time in storage counts against shelf life. When either limit is in question, the lot value is at risk.
How is the per-pound exposure calculated? Total exposure divided by the at-risk weight. At the defaults, $3,026 across 28 lb is about $108.07 per pound, and that includes the fixed retest cost.
Does this say the prepreg is unusable? No. It prices the exposure while the decision is open. Usability still depends on a retest against the material specification or the supplier's advice.
Why spread a fixed cost over the weight? The retest and quarantine cost does not scale with weight, so spreading it over the at-risk pounds raises the per-pound exposure most on small lots.

Last reviewed 2026-10-01.