A first container order is an act of trust. The product is sealed inside pails and drums, it will sit in an engine for two years or more, and if it fails, the failure happens in your market, with your brand on the label — not at the factory. Experienced importers reduce that risk long before signing anything, with a simple evaluation process. Here is the checklist we recommend, written from the manufacturer's side of the table.
The ten points at a glance
| # | What to check | What a reliable supplier looks like |
|---|---|---|
| 1 | Factory or trader | Real address, real production lines, open to visits or third-party inspection |
| 2 | Written specifications | A TDS with measured values and units — not adjectives |
| 3 | Safety documents | MSDS provided on request and matching the actual formula |
| 4 | Samples before contract | Willing to send normal-production samples for independent testing |
| 5 | Specification discipline | The approved sample and the container load are the same product |
| 6 | Consistency system | Raw material checks, in-process controls, retained samples per batch |
| 7 | Packaging and labelling | Export-grade pails and drums, private label, destination-market labels |
| 8 | Batch traceability | Batch numbers, filling dates and retention samples for every run |
| 9 | Export experience | Fluent FOB/CIF quoting, container loading plans, correct documents |
| 10 | Communication | Direct answers, realistic lead times, no document dodging |
Start with documents — but do not stop there
A TDS tells you what the product should be; a test report tells you what it actually is. Ask for the TDS of every product you plan to import and read it like a specification sheet: measured values with units — freezing point, boiling point, pH, reserve alkalinity — not adjectives. MSDS provided on request is normal practice in this industry. What matters is whether the document matches the goods you will actually receive, so cross-check the product name and the density on the MSDS against the sample in your hand.
Test the sample as if it were the container
- Ask for samples from normal production, not a specially prepared batch.
- Test what your market actually cares about: freeze and boil protection, pH, appearance, odour, colour stability — and compatibility with local water, where that is relevant to how your customers top up.
- Keep a sealed reference sample of what you approved, and compare it against the first container when it arrives.
- Where possible, have an independent laboratory run the key numbers rather than trusting the supplier's own report alone.
Ask how consistency is made, not just whether it exists
The question that separates factories from filling shops is this: how do you keep batch 500 the same as batch 5? Listen for raw material qualification, in-process checks such as glycol content and pH, retained samples for every batch, and filling-line discipline. You are not auditing the chemistry — you are checking whether the factory has a system, or just a mixer.
Packaging and labelling are part of the product
- Pail and drum wall thickness, and drop performance, should be specified against sea-freight stacking conditions.
- Private label support: label language, regulatory elements for your destination market, cartons and shipping marks.
- Palletising and a container loading plan — these decide your damage rate on arrival more than any other single factor.
- Leak testing and pressure checks at the filling line, with records you can ask to see.
Read the commercial signals
A minimum order quantity too low to be true usually means repurchasing from someone else's factory. A lead time that looks too good usually means the busy season will not be honoured. Fluency in quoting FOB and CIF — with a real container loading plan behind it — is the fastest proxy for export experience. And one more: a factory that says openly "this item is not produced by us, here is our partner manufacturer's quotation" is telling you something good about how it handles everything else.
Red flags
- Refuses samples, or sends samples that do not match the documents.
- Cannot explain clearly where and by whom the product is manufactured.
- Documents that show logos but no verifiable details behind them.
- Pressure to skip testing "to save time".
The checklist costs a few weeks. A wrong coolant decision costs longer: field failures, claims, and a market that remembers. Run the list once, properly, and every order after the first one gets easier.
Request our evaluation pack
Ask us for the TDS set (ready to download), MSDS (on request) and normal-production samples — then put every question on the checklist above to the test.