---
description: 50-piece watch gasket O-ring set, 0.5mm, 12-30mm. Ultra-thin rubber seals for narrow-groove case backs. Repair & battery replacement.
title: Watch Gasket Waterproof O-Ring 0.5mm (50 pcs) - Sofly
image: https://www.soflypart.com/wp-content/uploads/2019/08/DSC01057_副本.jpg
---
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- **Watch Gasket Waterproof O-Ring 0.5mm (50 pcs)**
[](https://www.soflypart.com/wp-content/uploads/2019/08/DSC01057_副本.jpg)
# Watch Gasket Waterproof O-Ring 0.5mm (50 pcs)
$8.00
You Saved
| Thickness | Choose an option 0.5mm Thick |
| --- | --- |
| Size | Choose an option 12mm 13mm 14mm 15mm 16mm 17mm 18mm 19mm 20mm 21mm 22mm 23mm 24mm 25mm 26mm 27mm 28mm 29mm 30mm- 12mm
- 13mm
- 14mm
- 15mm
- 16mm
- 17mm
- 18mm
- 19mm
- 20mm
- 21mm
- 22mm
- 23mm
- 24mm
- 25mm
- 26mm
- 27mm
- 28mm
- 29mm
- 30mm
Clear |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 2 | — | $8.00 |
| 3 - 4 | 5% | $7.60 |
| 5 - 9 | 7% | $7.44 |
| 10 - 14 | 10% | $7.20 |
| 15+ | 15% | $6.80 |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 2 | — | $8.00 |
| 3 - 4 | 5% | $7.60 |
| 5 - 9 | 7% | $7.44 |
| 10 - 14 | 10% | $7.20 |
| 15+ | 15% | $6.80 |
Watch Gasket Waterproof O-Ring 0.5mm (50 pcs) quantity
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- Covers 99% of Repair Needs
- Wholesale Discounts
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## Product Description
This **Watch Gasket Waterproof O-Ring Set** includes **50 pieces** of high-quality rubber O-rings with a thickness of **0.5 mm**, available in diameters from **12mm to 30mm**. These gaskets are designed to provide reliable waterproof sealing for watch case backs and crowns, ensuring protection against moisture and dust ingress during daily wear.
## Features & Function
- **50-piece set** – ample supply for multiple repairs
- **19 diameter sizes** – covers 12mm to 30mm range
- **Ultra-thin 0.5mm thickness** – ideal for narrow-groove case backs
- **Durable rubber material** – flexible, corrosion-resistant, and long-lasting
- **Reliable waterproof sealing** – protects movement from moisture and dust
## Specifications
- **Material**: Rubber / Silicone
- **Thickness**: 0.5 mm
- **Diameter Sizes**: 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30 mm
- **Quantity**: 50 pieces (approximately 2-3 per size)
- **Type**: Case back O-ring / Gasket
- **Condition**: Brand new, aftermarket
## Applications
- **Replacement** for worn, cracked, or degraded case back gaskets
- **Battery replacement** – restoring water resistance after battery change
- **Routine maintenance** – replacing gaskets during full service
- Suitable for **watchmakers**, **repair technicians**, and **DIY enthusiasts**
## FAQs
**1. Are these original brand gaskets?**
No, these are **generic aftermarket gaskets**, not from a specific brand. They are designed as compatible and affordable replacements.
**2. What is the difference between 0.5mm and other thicknesses?**
The **0.5mm** thickness is designed for case backs with **very narrow gasket grooves**, typically found in slim dress watches or vintage models. Use thicker gaskets (0.6-0.9mm) for wider grooves. Always check your watch’s original gasket thickness.
**3. Which size should I choose for my watch?**
Measure the **inner diameter of your watch case back** or the old gasket diameter, then select the corresponding size from the 12-30mm range. This set is ideal for **small to medium watches** and **ladies’ models**.
## Why Choose SOFLY Watch Parts?
- Fast worldwide shipping within 3 business days.
- Competitive pricing on Seiko/Hattori calibers.
- 3,000+ watch movements and parts in stock.
- Trusted by watchmakers worldwide.
- Personalized sourcing support via **info@soflypart.com** or WhatsApp **+86 18620212114**.
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Features & Function 50-piece set\u00a0\u2013 ample supply for multiple repairs 19 diameter sizes\u00a0\u2013 covers 12mm to 30mm range Ultra-thin 0.5mm thickness\u00a0\u2013 ideal for narrow-groove case backs Durable rubber material\u00a0\u2013 flexible, corrosion-resistant, and long-lasting Reliable waterproof sealing\u00a0\u2013 protects movement from moisture and dust Specifications Material: Rubber / Silicone Thickness: 0.5 mm Diameter Sizes: 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30 mm Quantity: 50 pieces (approximately 2-3 per size) Type: Case back O-ring / Gasket Condition: Brand new, aftermarket Applications Replacement\u00a0for worn, cracked, or degraded case back gaskets Battery replacement\u00a0\u2013 restoring water resistance after battery change Routine maintenance\u00a0\u2013 replacing gaskets during full service Suitable for\u00a0watchmakers,\u00a0repair technicians, and\u00a0DIY enthusiasts FAQs 1. Are these original brand gaskets? 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