Sealant splits while remaining bonded to both sides.
Use the site evidence to agree a project-specific method with the responsible engineer, concrete producer, manufacturer or specialist applicator.
Sealant splits while remaining bonded to both sides.
Measure movement, width-to-depth ratio and three-sided adhesion.
Excess movement, too-deep joint or absent bond breaker can overstress sealant.
Redesign joint geometry and choose movement capability suited to actual displacement.
Install correct backing to control depth and avoid bonding to the base.
Inspect geometry and monitor a representative movement cycle.
A stronger adhesive primer cannot correct incorrect joint design.
References inform the topic; they do not endorse a specific product for this project.