Technical Information – Specifications & Material Details
Click below to view each downloadable PDF.
What we do
We extrude Polypropylene because it is one of the most flexible, durable, and recyclable materials in the world. There is not a major industry that doesn’t use plastic corrugated in one way or another including printing, returnable packaging, food, construction, and pharmaceutical industries just to name a few. Our material is fiber free and our facility is certified for the safe handling of food products approved for us in commercial kitchens.
- Product Safety Data Sheet
- Health and Food Safety
- Sheet & Die Cut Tolerances
- Product List Spec Sheet
- Canadian Food Inspection Agency
- Thermal Information
- Seafood Box Capabilities
- Sheet Goods Capabilities
- Thermal Performance of CoolSeal boxes vs Other Boxes
- Insulation Measurements During Transportation
- Why Our SEALED EDGE Makes a Difference!
Spec Sheets
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Independent Testing & Thermal Research
CoolSeal’s cold-chain performance isn’t just our claim — it’s been independently studied. Below is the third-party thermal research conducted by The Sea Fish Industry Authority, along with summaries of what it means for your product. Start with the overview, then dig into the full report.
Insulation Test Report
A visual look at how CoolSeal holds temperature against polystyrene and fiberboard across a 66-hour distribution cycle. The fastest way to understand the cold-chain advantage.
CR192 Executive Summary
A one-page summary of the independent Sea Fish Industry Authority findings — ideal for sharing with buyers and decision-makers.
CR192 Full Report — Sea Fish Industry Authority
The complete independent study comparing the thermal performance of CoolSeal (corrugated plastic) packaging against expanded polystyrene and single-walled fiberboard boxes.
Cost Savings & Sustainability
Switching to CoolSeal pays off before the first box is even packed. Because our boxes ship flat, you move and store a fraction of the volume — and because they’re 100% PP5 recyclable, you cut disposal costs at end of life. See the freight, storage, and disposal math at a glance.
Cost Savings Realized
One truckload of CoolSeal packaging equals seven truckloads of EPS. One pallet of boxes equals twelve pallets of foam. See the full freight, storage, and disposal breakdown.
Seafood Box Flyers & Sizing
Quick-reference sell sheets for our seafood line — what makes the sealed-edge box different, and every standard size at a glance.
Leakproof Seafood Box Flyer
An at-a-glance look at the features that set our sealed-edge seafood box apart: hygienic, leakproof, durable, and 100% recyclable.
Seafood Box Standard Sizes
Internal and external dimensions for the full seafood range — portion, fillet, salmon, and shellfish boxes — in one reference sheet.
Variety in stock & Customized sheets for you
While we stock sheets in a variety of thicknesses and colors for immediate availability, we also extrude custom sized sheets to eliminate waste or costly scrap within your facility. All of our sheets are corona treated for printing or adhesive application.
Added fabrication services
Beyond extrusion, we offer a variety of value added fabrication services to our customers including printing, die cutting, specialty gluing, light assembly and lamination. The cloths we laminate are specific to the automotive returnable packaging industry and provide a non-abrasive surface for part protection while the plastic corrugated itself offers a substrate to build from. Laminant that we use include Spun Bound Polypropylene, Brushed Nylon, Evalon, Tyvek, Microfiber Suede and Volara cross linked polyethylene foam. All lamination is done specific to customer order using the latest technology in adhesive.
Full service extruder and fabricator of corrugated plastic
Lastly we offer assembly and automated finishing through our folder gluer, and can warehouse product to combat lead times.
CoolSeal USA wants to be your plastic corrugated supplier of choice, we are large enough to serve you in a fashion that no one else can while being small enough to address your needs.
Frequently Asked Questions
What sizes do CoolSeal seafood boxes come in?
Stock seafood boxes range from 5 lb to 50 lb. Fish boxes come in 5, 10, 20, 30, and 50 lb, plus a 13 kg size. There are also 10 and 20 lb fillet boxes and a salmon box. Shellfish boxes include #10 and #20 leakproof boxes, a #10 draining box, and a 20# shellfish box. Stock fish boxes are white and unprinted. Inside and outside dimensions are on the Seafood Box Standard Sizes flyer.
Are CoolSeal boxes food safe?
Yes. CoolSeal boxes comply with FDA food contact regulations (21 CFR 177.1520), and CoolSeal USA provides a written FDA letter of guarantee. The sealed edge also closes the open flutes, so dirt and moisture cannot collect inside the board.
Technical information and downloads
Does CoolSeal have an FDA letter of guarantee?
Yes. CoolSeal USA's FDA Letter of Guarantee, dated January 2, 2026, states that products it sells comply with the Federal Food, Drug and Cosmetic Act and that its facility operates under the 21 CFR Part 123 Seafood HACCP regulations. It also covers the Bioterrorism Act, the Food Safety Modernization Act, and the Foreign Supplier Verification Program, and says a documented food safety program is kept on file. Ask for a copy.
How does CoolSeal keep its plant contamination free?
CoolSeal USA's contamination-free letter, dated January 2, 2026, says the plant runs a pest control program performed weekly by Orkin, keeps food in the lunch area, maintains machinery to prevent lubricant run-off, and traces raw material to the time of receipt and its source. It states the packaging is free of nanoparticles, synthetic fumigants, fungicides, and pesticides, and references CONEG hazardous packaging laws and RoHS documentation.
Contamination-free letter (PDF)
Do independent tests show corrugated plastic boxes keep fish cold?
Yes. In an independent trial by the UK's Sea Fish Industry Authority (report CR192, December 2002), haddock fillets packed with ice in a Tri-pack Plastics corrugated plastic box averaged 0.4 degrees C over 72 hours in a controlled 2 degree C chilled chain. That compared with 0.0 degrees C in polystyrene and 0.6 degrees C in single-walled fibreboard. The authors found all boxes held fish close to 0 degrees C in a controlled chain, and advised more insulated boxes such as polystyrene in an uncontrolled chain.
Seafood box research and downloads
How do I clean and sanitize CoolSeal boxes?
Wash with a detergent first, rinse, then sanitize, and repeat on a regular schedule, such as weekly for CSA boxes. CoolSeal lists these food-safe options: sodium hypochlorite (bleach), hydrogen peroxide, detergents and soaps, and certified organic sanitizers. The Food and Agriculture Organization (FAO) gives this general guidance for plastic containers:
Keep the cleaning temperature below the softening point of the plastic.
Do not use abrasive cleaners or solvents such as white spirit.
Discard cracked or badly scratched containers.
Follow the cleaner's label. Solutions of 1 to 2 percent are usually enough, and stronger is not better.
Rinse with plenty of clean water.
Never mix detergents with sterilizers. Bleach mixed with an acid can release dangerous fumes.