Composites, Fiberglass & Advanced Materials calculator
Resin Waste Cost Calculator
Price the mixed resin left in the pot, purged or dripped, then add disposal and cleanup. The per-pound row lets you compare waste across batches of different sizes.
What this calculator does
- Cost of wasted mixed resin from pot-life loss, purge and drips, plus disposal and cleanup, with a per-pound view.
Formula used
- Wasted resin value = wasted weight × mixed resin cost × charged share ÷ 100
- Total resin waste cost = wasted resin value + disposal and cleanup
- Waste cost per pound = total resin waste cost ÷ wasted weight, blank when the weight is zero
Inputs explained
- Wasted Mixed Resin: Mixed resin lost to pot life, purge and drips.
- Mixed Resin Cost: Blended resin and hardener cost per mixed pound.
- Charged Share: Share of the waste charged to this job, from the cost sheet.
- Disposal and Cleanup Cost: Disposal and cleanup charge for uncured reactive waste.
How to use the result
- Best suited to pricing pot-life loss on a slow layup, comparing waste across two layups, building a mix-batching case.
- A mixed waste stream needs a blended cost per pound or a separate run. Any rebate for recovered resin is not deducted from the total.
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 counts as wasted mixed resin? Mixed resin left in the pot when it gels, plus purge, drips and any spray collected after mixing. Unmixed resin returned to stock is not waste.
- Why does the per-pound row include disposal cost? It divides the total, so the fixed disposal and cleanup charge spreads across the wasted pounds. For material value alone, read the wasted resin value row.
- How can I cut mixed resin waste? Batch to the layup ahead, mix smaller lots against the pot life, and keep the resin and hardener charts at the bench. Mixed resin has no return path, so prevention beats disposal.
- Why is the per-pound row blank at zero weight? A cost per pound with no pounds has no population, so the row stays blank while the total shows the disposal charge alone. Enter the wasted weight to price it.
Related guides
Last reviewed 2026-10-01.