How to Verify Technical Data Sheets, Safety Data Sheets and Test Reports Before Purchasing

Quick Answer

Three documents land in an inbox together and are usually read as one thing. They answer three different questions:

• TDS — what this product is and what it is expected to do, under stated conditions.
• SDS — how to handle, store and transport it safely. It says nothing about performance.
• Test report — what a specific laboratory measured on a specific specimen, by a specific method.

The verification job is not “do I have documents”. It is “do these documents describe the product I am buying, and do they prove the claim I care about”. Those are different questions, and the second one is where purchase decisions are won or lost.

1. What Each Document Can and Cannot Prove

Two of those lines cause most of the confusion in procurement: ISO 9001 is a factory-system certificate, not a product approval, and a CE mark states declared characteristics — it does not certify fitness for a particular project.

2. First Check Identity, Not Performance

Before reading a single number, confirm that the document is about the product you are buying — and that the factory behind it can be qualified in the first place.

• Model code matches exactly. Ranges contain near-identical codes: a low-modulus grade and a standard grade can differ by one suffix and behave differently in the same joint.
• Revision date is current, and the revision number appears on every page.
• Units and test conditions are stated. “MPa” without a specimen geometry, or “elongation” without a test speed, is not a specification.
• The document is the manufacturer’s, not a distributor’s retyped summary. Retyped datasheets are where transcription errors live.

A practical rule: if the TDS does not name the standard it was tested to, treat the number as marketing until a test report says otherwise. When you need the full range of models behind a document set, start from the product categories.

3. Read the TDS Like a Specification Reviewer

Four things separate a usable TDS from a decorative one.

1. “Typical” versus guaranteed. Most TDS values are typical. That is normal and honest — but a tender that requires a minimum must be matched against a guaranteed figure, not a typical one. Ask which values are guaranteed and with what tolerance.

2. Test method per property. Displacement capability means nothing without the class and the standard behind it. In the INGADA range, for example, MS-625 is a low-modulus polyether at ±25% displacement, tensile strength ≥1.4 MPa and elongation ≥450%. Those are only comparable to a competitor’s figures if both name the same test basis.

3. Application limits, stated positively. A good TDS says what the product is not for. A sealant rated for intermittent wetting is not a ponding sealant; a 25-class joint sealant is not the answer for a 50-class movement joint. Absence of limits is a signal, not reassurance.

4. Cure and service conditions. Substrate temperature range, service temperature range, and the difference between skin-over time and full cure. Buyers routinely substitute one for the other and then argue about a schedule.

4. Test Reports: Scope Is the Whole Story

A test report is evidence only within its scope. Check five fields before accepting it:

Where a project requires a specific market’s approval — a Gulf conformity scheme, for example — the honest position is that the manufacturer can assist with the application process for that market. No supplier should claim to already hold a national approval it does not hold, and a buyer should ask for the certificate number rather than accept the claim.

5. SDS: Read It for Handling, Not for Selling

The SDS matters commercially in three places, none of them performance:

• Sample shipping. Aerosol PU foams and some solvents cannot travel by normal courier; they must go through a freight forwarder. If you plan a site trial, this affects the timeline.
• Storage at your warehouse. Shelf life and temperature limits in the SDS usually match the TDS, and both bind your stock policy.
• Customer questions. Facility managers ask for SDS before a product is allowed on site. A missing or untranslated SDS stops an installation, not a purchase order.

Check that the SDS is in the destination language and matches the model on the TDS. A mismatch between two documents from the same supplier is a reliable indicator of how the rest of the file was assembled.

6. Keep a Document Register, Not a Folder

A register makes the review auditable and survives staff changes. Minimum columns:

Background on how the standards are applied in practice sits in the knowledge center.

The register turns “the supplier sent us documents” into “we can prove which claim rests on which evidence” — which is exactly what a technical reviewer or a customer audit will ask for.

7. Traps That Recur

• Screenshot datasheets from a website, undated and unnumbered.
• Cross-model copying: one figure quoted for a whole series, with the model name swapped.
• Certificates that name no issuing body or no certificate number.
• Expired revisions still circulating in a sales folder.
• Claims with no measurable definition — “high performance”, “extreme durability”, “permanent flexibility”. None of these can be verified, so none of them should be specified.