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Offset Kerf Window Seals
Offset kerf window seals are designed for window systems where the mounting kerf and sealing location are not directly aligned. By positioning the sealing element away from the mounting interface, these weatherseals provide a solution for window profiles that require sealing contact in a different location than the available mounting point.
Quanex offers multiple offset kerf window weatherseal profiles with varying reaches, bulb configurations, mounting dimensions, and recommended openings. This range of options allows engineers and window manufacturers to evaluate weatherseal configurations based on the geometry, dimensional requirements, and sealing objectives of their specific window systems.
For applications where hardware placement, profile geometry, or other design constraints prevent the mounting location and sealing location from aligning, offset kerf weatherseals provide additional design flexibility while maintaining the sealing interface required by the assembly.
Designed for window systems with offset sealing locations
In many window systems, the location where sealing contact is required does not align directly with the available mounting location. This condition can result from frame geometry, hardware placement, operating components, or other design constraints within the assembly. Offset kerf weatherseals address this challenge by positioning the sealing element away from the mounting kerf while maintaining a secure mounting interface.
Unlike standard kerf-mounted weatherseals that position the sealing element directly above the mounting location, offset profiles separate those two functions. This allows engineers to accommodate more complex window geometries without redesigning the mounting interface itself.
Because sealing performance depends on the relationship between the weatherseal and the surrounding window components, profile selection should consider the complete assembly. Reach, bulb geometry, mounting dimensions, available opening, and surrounding clearances all influence how the seal performs within the finished window system.
Quanex offset kerf window weatherseals are available in multiple TPE foam configurations with reaches ranging from 0.250” to 0.370”, providing options for a variety of window designs and sealing requirements.
- Confirm the Offset Configuration: Evaluate the relationship between the mounting kerf and the intended sealing location. The offset profile must position the sealing element so it can establish contact where sealing is required within the window assembly.
- Verify Mounting Compatibility: Match mounting width and mounting depth requirements to the window profile to help ensure proper fit and secure retention after installation.
- Evaluate Reach Requirements: The selected profile must extend from the mounting location to the intended sealing interface. Compare available reach dimensions with the actual distance required by the assembly.
- Account for the Available Opening: Compare the recommended opening with the actual system dimensions to help establish sealing contact without excessive compression or interference.
- Consider the Complete Window System: Review surrounding hardware, frame components, operating clearances, and other design features that could influence seal placement.
- Start with the Sealing Location: Identify where sealing contact is needed before selecting a profile. Working backward from the sealing interface often helps determine the appropriate reach and offset configuration.
- Evaluate Bulb Geometry: Bulb shape and dimensions influence how the weatherseal contacts the opposing surface. Review profile geometry alongside available space and contact requirements.
- Review Dimensions as a Complete System: Avoid selecting a profile based on a single dimension. Reach, bulb size, mounting width, mounting depth, and recommended opening should be evaluated together.
- Consider Sealing Performance Objectives: Evaluate how the selected profile will interact with the surrounding window components and whether the sealing arrangement supports the performance objectives of the overall system.
Weatherseals
Offset Kerf Window Seal Profile Comparison
Compare available offset kerf window weatherseal profiles by reach, bulb dimensions, mounting width, mounting depth, and recommended opening. Reviewing these characteristics together can help engineers identify profiles that align with the geometry and sealing requirements of their window systems.
| Profile Number | Reach | Bulb Size | Mounting Width | Mounting Depth | Recommended Opening |
|---|---|---|---|---|---|
| 12029 | .270" | .250" dia | .105" | .240" | .080" |
| 12120 | .300" | .275" dia | .105" | .240" | .080" |
| 12142 | .360" | .335" dia | .150" | .240" | .120" |
| 12189 | .370" | .355" dia | .105" | .230" | .080" |
| 12195 | .270" | .250" dia | .105" | .275" | .080" |
| 12274 | .360" | .280" width | .105" | .220" | .080" |
| 12352 | .275" | .250" dia | .105" | .220" | .080" |
Need Help Selecting an Offset Kerf Window Seal?
Window systems do not always place the mounting location and sealing location in the same position. Quanex works with engineers and product teams to evaluate offset kerf weatherseals, compare profile options, and identify solutions that fit the geometry dimensional requirements, and sealing objectives of the application.
Contact our weatherseal team to discuss your window design, installation constraints, and sealing requirements. We can help you identify the offset kerf weatherseal configuration that best aligns with your application.
This page was last updated on November 13, 2026. Downloaded document versions may differ. Please check the individual documents for most current version.