Crawler peeling (adhesion of adhesive/sealant crawlers)
The peel test assesses the adhesion of elastic adhesives/sealants (e.g., for facade joints) to concrete substrates. DIN ISO 21194 is the current standard (replaces DIN 54457).
How is the test performed?
A defined bead of sealant is applied to the prepared substrate, allowed to cure, and then peeled off under specified conditions.
The type of failure/fracture patterns (adhesive, cohesive, mixed) and, if required, the peel force are evaluated. Optional pre-aging in accordance with the standard can be agreed upon.
Special features of facade joints
DIN 18540 (planning, execution, product requirements) applies to exterior wall joints in building construction. Joint sealants used must comply with EN 15651-1 (CE marking for facades). The bead peel test is the practical proof of adhesion/suitability on the specific substrate.
Relevant standards (selection)
- DIN ISO 21194 – Bead peel test for elastic adhesives/sealants.
- DIN EN ISO 10365 – Designations of fracture patterns of adhesives.
- DIN EN ISO 9142 – Guidelines for laboratory aging conditions.
- DIN 18540 – Sealing of exterior wall joints in building construction.
- EN 15651-1 – Joint sealants for facade elements (CE marking).