Rissüberbrückend

Rissüberbrückend, which translates to "crack bridging" in English, refers to a property of materials, particularly coatings and sealants, that allows them to span and effectively cover existing cracks without failing. This is a crucial characteristic in applications where a surface is subject to movement or has developed minor imperfections. A rissüberbrückend material maintains its integrity and continues to provide protection or sealing even when stretched or compressed due to the underlying crack.

The effectiveness of rissüberbrückend materials is often quantified by their elongation at break and their ability to resist crack propagation. These properties are influenced by the material's composition, its elasticity, and its adhesion to the substrate. High elongation at break allows the material to stretch considerably before rupturing, thus accommodating the widening of a crack. Good adhesion ensures that the material remains attached to both sides of the crack, preventing delamination.

Common applications for rissüberbrückend materials include waterproofing membranes for roofs and basements, facade coatings, elastic joint sealants, and protective coatings for structures susceptible to thermal expansion and contraction. The ability to bridge cracks significantly extends the lifespan of protective layers, prevents water ingress, and maintains the aesthetic appearance of surfaces. Materials such as certain polymer-modified cements, polyurethane-based sealants, and elastomeric coatings are specifically engineered to exhibit these crack-bridging capabilities.