Technology Derived from Oyster Shells
That Doesn’t Cost the Earth.

From Shell...

From Shell...

to Shelf...

to Shelf...
  • Masterbatch for multi-use and disposable products
  • Sustainable calcium carbonate (CaCO3)from oyster shells
  • Carbon Negative – 71%* less CO2 than fossil-fuel resins
    • Replace fossil-fuel-based resins up to 45%
    • Lower carbon footprint up to 43%
  • Universal equipment compatibility
  • Recyclable
  • Food safe, GRAS by FDA


Oysterplast™ Composite Bioresin for HDPE, LDPE, LLDPE, PET, PP, & PVC


The Benefits of Oysters

  • On average, Oysters sequester 8 grams of carbon to make their shells.
  • Oysters actively remove “new” carbon (C-14) from the environment as they make their shells.
  • Calcium carbonate (CaCO3) derived from oyster shells has 181% less CO2 than Precipitated Limestone CaCO3
  • Oysters are biorenewable, so they will regenerate and, in the process, continue sequestering carbon in the environment.
  • Oysters are biowaste and pollute coastal communities. We utilize discarded oyster shells to reduce reliance on fossil-fuel resins.

Why Limestone derived CaCO3 is NOT a sustainable material


  • Limestone CaCO3 is entirely old “fossilized” carbon (C-12) and a carbon positive material.
  • Limestone CaCO3 mining is environmentally destructive and destroys the ecosystem and habitats around the mine.
  • Limestone mining contaminates groundwater and aquifers around the mine.
  • Limestone mining removes support rocks and can lower the water table causing sinkholes.
  • Limestone mining creates dust and can affect urban and rural residential areas downwind.


Oyster Shells vs. Limestone

Oyster Shells

Biorenewable? Yes
Biogenic Carbon % (C-14) 100%
Fossilized Carbon % (C-12) 0%
Carbon Negative/Positive? Negative
Extraction Harmful to Environment? No



Biorenewable? No
Biogenic Carbon % (C-14) 0%
Fossilized Carbon % (C-12) 100%
Carbon Negative/Positive? Positive
Extraction Harmful to Environment? Yes

How Much CO2 Could you Save with Oysterplast™ Composite Bioresin?

% of CO2 Savings:


% of Plastic Eliminated:


*Savings estimates based on utilizing Oysterplast 75 Composite Resins. CO2 emissions reduction estimates are based on a third-party Cradle to Gate Life Cycle Assessment conducted in November 2022.

Our Technologies Work With a Wide Variety of products

The materials in our products are GRAS (Generally Recognized As Safe) by the FDA and are safe to be used for direct and indirect food and beverage contact.

“GRAS” is an acronym for the phrase Generally Recognized As Safe. Under sections 201(s) and 409 of the Federal Food, Drug, and Cosmetic Act (the Act).

Get In Touch.

If you are interested in working with us to achieve a cleaner future, we’d love to hear from you.