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- Porsche 356B 1959-63
- Porsche 356C 1963-65
The OE MATCH Rear 1/4 Window Upright Seal is a replacement rubber weather seal designed for Porsche 356 B T6 and 356 C Cabriolet models fitted with a hardtop. Manufactured to provide an OE-style fit and appearance, this seal helps restore the original weather protection around the upright section of the rear quarter window.
Fits:- Porsche 356 B-T6 / 356 C Cabrio Hardtop
Diagram Ref No 33
Designed to create a protective barrier against water, wind, dust and road contaminants, the seal helps maintain a dry, comfortable cabin while protecting the surrounding window frame and interior trim from moisture-related damage.
Ideal for replacing aged, cracked, hardened or deteriorated original rubber seals, this OE MATCH component is a practical solution for classic Porsche restoration, hardtop refurbishment and routine maintenance.
What This Product Does:
The rear quarter window upright seal provides a protective sealing barrier along the vertical section of the rear side window assembly, helping prevent moisture and outside air from entering through gaps around the window.
Its key functions include:
- Weather Protection: Helps prevent rainwater and moisture from entering around the rear quarter window upright.
- Wind Noise Reduction: Reduces unwanted wind noise and draughts caused by gaps in the window sealing system.
- Dust and Dirt Prevention: Limits the entry of road dust, dirt and other environmental contaminants.
- Window Sealing: Helps maintain consistent contact between the rear quarter window assembly and its surrounding structure.
- Vibration Reduction: Provides a flexible rubber interface that can help minimise vibration and rattling.
- Interior Protection: Reduces moisture exposure that could damage interior trim, upholstery and surrounding metalwork.
- Original Appearance: Helps restore the factory-style finish and appearance of the classic Porsche hardtop window assembly.
Symptoms Of Wear Or Failure:
Over time, exposure to sunlight, temperature changes, moisture and general ageing can cause rubber window seals to deteriorate. Common signs include:
- Cracked or Split Rubber: Visible cracks or splits in the seal indicate deterioration and reduced weather protection.
- Hardened or Brittle Seal: Ageing rubber can lose its flexibility, preventing it from maintaining proper contact with surrounding surfaces.
- Water Leaks Around the Rear Quarter Window: Moisture entering near the upright window section may indicate a damaged or poorly fitting seal.
- Increased Wind Noise: Whistling sounds, wind noise or draughts while driving can result from gaps in the sealing surface.
- Shrinking or Deformed Rubber: An aged seal may shrink, flatten or become distorted, leaving visible gaps around the window.
- Loose or Displaced Seal: A deteriorated seal may no longer sit correctly within its mounting position.
- Damp Interior Trim: Moisture accumulation around the rear side window can indicate that the weather seal is no longer functioning effectively.
- Visible Gaps Around the Window: Poor sealing contact may allow water, dust and outside air to enter.
- Corrosion Around Window Surrounds: Persistent moisture ingress can contribute to rust or corrosion around adjacent metal components.
Why Replacement Matters:
- Replacing a worn or damaged rear quarter window upright seal is an important part of maintaining the weather protection, comfort and original condition of your classic Porsche 356.
- As rubber seals age, they gradually lose elasticity and may become hard, brittle, cracked or misshapen. This reduces their ability to form an effective barrier against moisture and outside air, potentially allowing water to enter the vehicle and damage interior materials.
- A deteriorated seal can also contribute to wind noise, draughts and poor sealing around the rear quarter window assembly. Replacing it helps restore a more secure fit and improves cabin comfort.
- Water ingress is particularly concerning in classic vehicles, where trapped moisture can lead to corrosion around window surrounds, body seams and interior panels. Installing a correctly fitting replacement seal helps reduce the risk of moisture-related deterioration and potentially costly restoration work.
- For Porsche 356 owners carrying out hardtop refurbishment or a complete vehicle restoration, replacing aged rubber seals is also an effective way to restore the original appearance and functionality of the window assembly.
- The OE MATCH Rear 1/4 Window Upright Seal provides an OE-style replacement solution, helping preserve the weather resistance, comfort and long-term condition of your classic Porsche.
Related reference numbers
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64454320160
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