Verify sealant-to-substrate adhesion using ASTM C794 peel testing during submittal review

Steps

1. Confirm ASTM C794's current scope on the ASTM store — a laboratory 90-degree peel adhesion test for cured elastomeric joint sealants on specific substrates (e.g., glass, aluminum, concrete, mortar).
2. Confirm the exact substrate materials on the project (glass type/coating, specific aluminum finish/anodize or paint system) match what's covered in the sealant manufacturer's submitted C794 report.
3. Request project-specific adhesion test results (not generic sealant datasheet claims) when the substrate finish differs from a manufacturer's standard tested substrates.
4. Cross-check C794 adhesion results against C1401's guidance on acceptable adhesion/cohesion failure modes before accepting a submittal.
5. Track any field-applied primer or substrate prep requirements identified in the C794 testing, since adhesion performance is often prep-dependent.