Kirkland Signature Review, Is Kirkland Signature Non-Toxic?
PFAS Authority is a scoring system, not a laboratory. We do not test products ourselves. Grades are model-based, built from published ingredients, materials, certifications, brand disclosures and third-party lab results where they exist. See the rubric.
Across 6 graded products, Kirkland Signature averages Poor (33/100). On disclosure, the brand says nothing publicly about PFAS. 1 of its products grade Good or better. Grades are model-based estimates, not lab results.
Worth buying from Kirkland Signature Good or better, safest first
Kirkland Signature
Plastic Wrap 11-7/8 x 750', 2-Pack
Polyethylene (PE) film
Polyethylene film degradation under heat
PE wrap is not microwave-safe and will soften, tear, or potentially release volatile…
Microplastics
If wrap tears or fragments during use and pieces contact food, ingestion of microplastics…
Lower PFAS concern since standard polyethylene cling wrap rarely requires fluorinated treatments, but Kirkland makes no transparency claim.
⚠Risky category by default
Graded and flagged Poor and Bad, we’d swap these
Kirkland Signature
Plastic Food Wrap
PVC or polyethylene film with undisclosed release agent/coating
PFAS
Undisclosed coating on Kirkland wrap almost certainly contains non-stick agents…
PVC chlorine leaching (if PVC formulation)
If the wrap is PVC-based rather than polyethylene, direct contact with fatty foods or…
Microplastics
Plastic wrap breaks down over time, especially if stretched, crumpled, or heated.…
Coating degradation and unknown leachates
Plastic wrap coatings degrade with age and temperature exposure. Without knowing…
Avoid until composition is transparent, as plastic wrap coatings often hide PFAS but Kirkland doesn't disclose.
⚠Waterproof or stain-proof treatment
Kirkland Signature
Stretch Tite Plastic Food Wrap
Polyethylene (PE) film with slip/stretch coating
Microplastic shedding from heat exposure
PE film can fragment or shed particles if heated above manufacturer limits or if the film…
Migration of slip-coating additives
The undisclosed slip or stretch coating may include silicones, waxes, or other…
Degradation and brittleness over time
Consumer reviews note that Stretch Tite can become brittle or lose elasticity after 6-12…
Standard plastic wrap with unknown slip treatment, lower concern than nonstick cookware, but coating composition not disclosed.
⚠Waterproof or stain-proof treatment
Kirkland Signature
12" Plastic Food Wrap, 3000 ft
Polyethylene (PE) plastic film with slip/release agent
Microplastic shedding during use
PE film can degrade and fragment if repeatedly stretched, heated, or exposed to UV light…
Slip coat leachables (fluorinated or otherwise)
Kirkland does not disclose slip agent chemistry. If the coating contains fluorinated…
Thermal degradation at elevated temperature
PE film begins to soften above 80-100°C (176-212°F) and should not contact hot foods or…
Lower PFAS concern but no transparency, as standard polyethylene wrap likely safe unless slip coat is undisclosed.
⚠Waterproof or stain-proof treatment
Kirkland Signature
Signature Food Wrap Stretch-Tite Premium Size: 12
polyethylene film with unknown moisture/grease barrier coating
Fluorinated polymer barrier coatings (food-contact surface)
Undisclosed barrier treatment in polyethylene food wrap is standard industry practice and…
Plastic migration under heat or extended contact
Any barrier coating or polyethylene can migrate oligomers into fatty or acidic foods if…
Microplastic or coating fragment shedding during use
Stretching, tearing, or rough handling of thin film wraps can generate polymer fragments…
Cumulative exposure through repeated use
Household use of unverified food wrap for frequent food storage represents low-level but…
Avoid since standard food wrap likely treated with fluorinated polymer and Kirkland offers no PFAS disclosure or testing.
⚠Waterproof or stain-proof treatment
Kirkland Signature
Signature Plastic Food Wrap - 6000 Sq. Ft (2 Pack, 12" X 3000 Sq. Ft
polyethylene (PE) with unclear slip/release coating
Slip/release coating migration (undisclosed chemistry)
Kirkland does not disclose whether slip agents are silicones, Teflon-type coating, or…
Microplastics
As the wrap ages or is stretched repeatedly, the slip coating can flake or degrade.…
Volatile organic compound (VOC) off-gassing
Slip agents and processing residues in PE wrap can off-gas, particularly in warm…
Adhesion failure and product efficacy decline
Kirkland plastic wrap is noted by consumers to lose cling over time or with repeated…
Proceed with caution since common plastic wrap category lacks disclosed coating chemistry.
⚠Waterproof or stain-proof treatment
Every grade uses the same public rubric. How grades work →