Supplier Guide
Factory Audit Checklist for Adhesive Buyers
A practical adhesive-plant audit playbook for packaging buyers: production authenticity, lab controls, warehouse FIFO, export readiness, red flags, and remote-audit options when you cannot travel yet.
Goal of an adhesive factory audit
You are verifying that the company can repeatedly make the adhesive you trialled—not that a showroom exists. Focus on batch control, testing discipline, warehouse practice, and whether technical staff can troubleshoot real corrugating or paper-converting problems.
Before the visit (or video audit)
Send your application sheet (papers, speeds, defects). Request TDS/SDS samples, factory license basics, organization chart for QC, and a proposed agenda. Agree photo/video rules. For remote audits, require live walkthrough of mixing, lab, and warehouse—not a recorded marketing clip.
Production authenticity checks
Raw-material receiving and lot coding; mixing records tied to finished lots; whether tolling or trading is involved; capacity vs your volume; changeover cleaning between grades. Ask operators simple process questions—scripted managers are a signal.
Laboratory and in-process control
Viscosity and solids testing frequency; calibration of cups/viscometers; retention samples; COA generation process; nonconforming batch quarantine. A plant without retention samples cannot investigate your claim later.
Warehouse and shelf-life discipline
FIFO evidence; humidity control for powders; temperature for liquids; damaged-pack policy; export packing area. Cross-check with the shelf-life Knowledge article criteria.
Technical service capability
Who supports overseas customers? Response time? Language? Can they interpret Stein-Hall logs and gel-temperature issues? Ask for a past troubleshooting case (redacted). No cases = no service.
Quality system and certificates
ISO or equivalent if claimed—verify scope. Do not over-weight wall certificates without process evidence. For brand programs, map which claims SDS/TDS actually support.
Commercial readiness for export
MOQ, lead time history, packaging labels, document set (invoice, packing list, COA), experience shipping to your region. Clarify Incoterms and who owns heat damage risk.
Red flags — walk away or downgrade to tiny trial only
No TDS; cannot explain viscosity method; refuses warehouse video; no lot traceability; price far below market without process story; pressure to pay full annual volume before trial; “same as famous brand” claims without data.
Scoring model (simple)
Process control 30%, lab/traceability 25%, technical service 20%, warehouse/export 15%, commercial clarity 10%. Set a minimum score before bulk POs. Re-audit after major formulation or ownership changes.
After the audit
Issue a written report, approve only specific SKUs, define trial gates, and schedule a seasonal check. Keep golden samples from approved lots.
Related PackTrades resources
Complete Guide to Packaging Adhesives, How to Choose Corrugated Board Glue from China, Adhesive Shelf Life and Storage Guide, and supplier profiles under packaging adhesives.