| 1 | Film construction | Confirm whether the wrap film is cast or calendared PVC. Cast and calendared films use different manufacturing processes and may differ in conformability and dimensional stability. | Technical data sheet identifying film type, construction, intended application, and recommended installation conditions. | Check that the stated construction matches the product sample and the intended vehicle surfaces. |
| 2 | Film thickness | Compare the stated film thickness and confirm whether it excludes the adhesive and release liner. Thickness alone does not establish overall performance. | Product specification showing the measurement method, tolerance, and whether the figure refers to film only or total construction. | Measure samples using an appropriate calibrated thickness gauge; assess film, adhesive, and liner separately where possible. |
| 3 | Adhesive and air-release features | Compare adhesive type, repositionability, initial tack, removal behavior, and whether the adhesive has air-release channels. Performance can vary with surface, temperature, and installation technique. | Adhesive description, installation guide, surface-preparation requirements, and test reports for the offered product. | ASTM D3330 includes peel-adhesion test methods for pressure-sensitive materials; request the specific method and test conditions because results are method-dependent. |
| 4 | Color and finish consistency | Compare color, gloss, texture, and finish across samples and production batches. Check the appearance under consistent lighting and viewing conditions. | Color reference, approved production sample, and written batch-to-batch color acceptance criteria. | Color can be specified using CIE L*a*b* measurements and a stated color-difference tolerance; require the measurement conditions and instrument details. |
| 5 | Outdoor weathering evidence | Compare test duration, exposure conditions, reported changes in appearance, and the limits of any outdoor-life claim. Laboratory exposure results do not by themselves guarantee a specific service life. | Complete weathering report identifying the tested product, exposure cycle, duration, evaluation criteria, and post-test results. | ISO 4892-2 describes exposure of plastics to laboratory light sources using xenon-arc lamps. Results should be interpreted with the test conditions and application in mind. |
| 6 | Adhesive holding performance | Ask how the adhesive performs under sustained load and whether the data relates to the same film and adhesive construction being quoted. | Test report stating substrate, surface preparation, temperature, dwell time, and test procedure. | ASTM D3654 covers holding-power test methods for pressure-sensitive adhesive tapes; confirm suitability before using it to compare wrap-film products. |
| 7 | Conformability and installation | Evaluate installation on flat panels, curves, recesses, and edges. Confirm the recommended temperature range, post-heating instructions, and limitations for complex shapes. | Installation manual, sample rolls, and trial results on representative vehicle panels. | Use a controlled application trial and document lifting, wrinkles, bubbles, edge behavior, and removal on the intended substrate. |
| 8 | Batch traceability and inspection | Compare how the supplier identifies production batches and handles inspection, nonconforming goods, and corrective actions. | Sample inspection records, batch labels, certificate of analysis where applicable, and documented complaint procedures. | Verify that the records identify the actual product and batch supplied; a certificate should not be treated as a substitute for product-specific inspection. |
| 9 | Quality management system | Check whether the manufacturing site has a current, independently certified quality management system and whether its scope covers the relevant production activities. | Current certificate, certification scope, issuing certification body, and certificate verification details. | ISO 9001 specifies requirements for quality management systems; certification does not certify that every individual product meets a particular performance level. |
| 10 | Warranty, supply, and order controls | Compare written warranty coverage, exclusions, storage requirements, roll dimensions, packaging, lead time, minimum order quantity, and remedies for verified defects. | Written warranty terms, product labeling details, packaging specification, order confirmation, and agreed defect-claim procedure. | Confirm that warranty conditions, installation requirements, and remedy terms are documented in the purchase agreement rather than relying on verbal claims. |