Ingress rating is measured on the assembly, not the seal
A seal does not have an IP rating; an enclosure does. The profile is one input alongside groove design, fastener spacing and lid stiffness. A profile that tests well in one housing can fail in another, which is why sampling on the actual assembly beats comparing datasheets.
Outdoor fixtures age by UV and thermal cycling
An exterior luminaire sees sun, rain and a daily temperature swing for years. Silicone handles the UV and the temperature range well, but the profile geometry has to keep enough compression force after cycling. This is where compression set data earns its place in the specification.
Visible seals have a finish requirement
On consumer-facing electronics and architectural lighting the seal is sometimes visible. Surface finish, colour consistency and a clean cut become acceptance criteria alongside sealing performance. Say so early - it affects which production route we quote.
Small sections, tight tolerances
Electronics enclosures usually have shallow grooves and thin walls, so the profile is small and the tolerance is tight. Extruding small sections consistently is a different problem from extruding large ones, and it is worth asking where the die was cut.
Send the enclosure, not just the drawing
If you can send the housing or a section of it, we can check the actual groove rather than the nominal one. Cast and extruded housings vary more than drawings suggest.
Profiles for this application
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Working on something like this?
Send the drawing, cross-section, operating temperature and what the seal has to resist. We will tell you whether a stock profile fits or the part needs extruding, and quote both.