A leading European supermarket bakery chain required reliable, food-safe gaskets for the access-door frames of their industrial bakery ovens. These ovens operate at elevated temperatures and undergo frequent heating and cooling cycles, putting significant thermal, mechanical, and hygiene demands on the sealing material. The gasket design needed a secure “grip” bottom-section extrusion to ensure a tight seal under repeated cycles, while remaining compliant with food industry standards and delivering long service life under harsh thermal and environmental stress.
Given these requirements, the material specification called for a high-performance silicone extrusion capable of withstanding high temperatures, resisting aging (ozone, UV, oxidation), maintaining mechanical resilience under compression and thermal cycling.
Solution: suraSil™ THT60 Section Extrusion
The selected solution was a specially-extruded section made from suraSil™ THT60, part of the suraSil™ solid-silicone range from Silicone Engineering. The suraSil™ portfolio includes a dedicated “THT” (High Temperature) grade to address demanding thermal environments.
Given the successful prototype trials and the strength of the material properties, we recommend specifying suraSil™ THT60 in technical drawings for oven-door frame gaskets, including full profile drawings of the bottom-grip geometry, and specifying extrusion tolerances, Shore hardness (e.g. A 60), and expected lifetime under cyclic thermal load. The gasket design transferred seamlessly from the previous trial material, ensuring full compatibility with existing production processes.
