---
description: Red plastic case back gasket set, 15-40mm, 5 pcs, 0.60×0.85mm. Reliable sealing, ideal for watch repair and battery replacement.
title: Watch Case Back Gasket Red Plastic 15-40mm (5 pcs) - SOFLY
image: https://www.soflypart.com/wp-content/uploads/2019/09/DSC08082.jpg
---
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- **Watch Case Back Gasket Red Plastic 15-40mm (5 pcs)**
[](https://www.soflypart.com/wp-content/uploads/2019/09/DSC08082.jpg)
# Watch Case Back Gasket Red Plastic 15-40mm (5 pcs)
$2.50
You Saved
| Size | Choose an option 16.5mm 16mm 17.5mm 17mm 18.5mm 18mm 19.5mm 19mm 20.5mm 20mm 21.5mm 21mm 22.5mm 22mm 23.5mm 23mm 24.5mm 24mm 25.5mm 25mm 26.5mm 26mm 27.5mm 27mm 28.5mm 28mm 29.5mm 29mm 30.5mm 30mm 31.5mm 31mm 32.5mm 32mm 33.5mm 33mm 34.5mm 34mm 35.5mm 35mm 36.5mm 36mm 37.5mm 37mm 38.5mm 38mm 39.5mm 39mm 40.5mm 40mm- 16.5mm
- 16mm
- 17.5mm
- 17mm
- 18.5mm
- 18mm
- 19.5mm
- 19mm
- 20.5mm
- 20mm
- 21.5mm
- 21mm
- 22.5mm
- 22mm
- 23.5mm
- 23mm
- 24.5mm
- 24mm
- 25.5mm
- 25mm
- 26.5mm
- 26mm
- 27.5mm
- 27mm
- 28.5mm
- 28mm
- 29.5mm
- 29mm
- 30.5mm
- 30mm
- 31.5mm
- 31mm
- 32.5mm
- 32mm
- 33.5mm
- 33mm
- 34.5mm
- 34mm
- 35.5mm
- 35mm
- 36.5mm
- 36mm
- 37.5mm
- 37mm
- 38.5mm
- 38mm
- 39.5mm
- 39mm
- 40.5mm
- 40mm
Clear |
| --- | --- |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 2 | — | $2.50 |
| 3 - 4 | 5% | $2.38 |
| 5 - 9 | 7% | $2.33 |
| 10 - 14 | 10% | $2.25 |
| 15+ | 15% | $2.13 |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 2 | — | $2.50 |
| 3 - 4 | 5% | $2.38 |
| 5 - 9 | 7% | $2.33 |
| 10 - 14 | 10% | $2.25 |
| 15+ | 15% | $2.13 |
Watch Case Back Gasket Red Plastic 15-40mm (5 pcs) quantity
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- Covers 99% of Repair Needs
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## Product Description
This **red plastic watch case back gasket set** includes **5 pieces**, available in diameters ranging from **15mm to 40mm**, with a cross-section size of **0.60 × 0.85 mm**. Designed to provide a reliable seal between the case back and the watch case, these gaskets help maintain **water resistance** and protect the movement from dust and moisture. They are an ideal replacement for worn or degraded original gaskets during routine maintenance or battery replacement.
## Features & Function
- **Red plastic material** – flexible and easy to install
- **Multiple diameters** – 15–40mm to fit various case sizes
- **Standard cross-section** – 0.60 × 0.85 mm
- **Reliable sealing** – maintains water resistance
- **Set of 5** – convenient for multiple repairs
## Specifications
- **Material**: Red plastic (PVC / silicone blend)
- **Diameter Range**: 15mm – 40mm (5 pieces, sizes may vary)
- **Cross-Section Size**: 0.60 × 0.85 mm
- **Type**: Case back gasket / O-ring
- **Compatibility**: Various watch case backs
- **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
- **Watch repair** – for professional and DIY use
- Suitable for **watchmakers**, **repair technicians**, and **DIY enthusiasts**
## FAQs
**1. Is this an original brand gasket set?**
No, this is a **generic aftermarket gasket set**, not from a specific brand. It is designed as a compatible and affordable replacement.
**2. What do the numbers 0.60 × 0.85 mm mean?**
These numbers refer to the **cross-section dimensions** of the gasket: **0.60mm (height)** and **0.85mm (width)** . This is a standard size for many watch case back gaskets.
**3. Are the gaskets pre-lubricated?**
These gaskets are typically supplied **dry** (without lubrication). We recommend applying a **small amount of silicone grease** before installation to ensure proper sealing.
## 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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They are an ideal replacement for worn or degraded original gaskets during routine maintenance or battery replacement. Features & Function Red plastic material\u00a0\u2013 flexible and easy to install Multiple diameters\u00a0\u2013 15\u201340mm to fit various case sizes Standard cross-section\u00a0\u2013 0.60 \u00d7 0.85 mm Reliable sealing\u00a0\u2013 maintains water resistance Set of 5\u00a0\u2013 convenient for multiple repairs Specifications Material: Red plastic (PVC / silicone blend) Diameter Range: 15mm \u2013 40mm (5 pieces, sizes may vary) Cross-Section Size: 0.60 \u00d7 0.85 mm Type: Case back gasket / O-ring Compatibility: Various watch case backs 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 Watch repair\u00a0\u2013 for professional and DIY use Suitable for\u00a0watchmakers,\u00a0repair technicians, and\u00a0DIY enthusiasts FAQs 1. Is this an original brand gasket set? 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Personalized sourcing support via\u00a0info@soflypart.com\u00a0or WhatsApp\u00a0+86 18620212114.","image":"https://www.soflypart.com/wp-content/uploads/2019/09/DSC08082-150x150.jpg","offers":{"@type":"Offer","description":"Product Description This\u00a0red plastic watch case back gasket set\u00a0includes\u00a05 pieces, available in diameters ranging from\u00a015mm to 40mm, with a cross-section size of\u00a00.60 \u00d7 0.85 mm. Designed to provide a reliable seal between the case back and the watch case, these gaskets help maintain\u00a0water resistance\u00a0and protect the movement from dust and moisture. They are an ideal replacement for worn or degraded original gaskets during routine maintenance or battery replacement. Features & Function Red plastic material\u00a0\u2013 flexible and easy to install Multiple diameters\u00a0\u2013 15\u201340mm to fit various case sizes Standard cross-section\u00a0\u2013 0.60 \u00d7 0.85 mm Reliable sealing\u00a0\u2013 maintains water resistance Set of 5\u00a0\u2013 convenient for multiple repairs Specifications Material: Red plastic (PVC / silicone blend) Diameter Range: 15mm \u2013 40mm (5 pieces, sizes may vary) Cross-Section Size: 0.60 \u00d7 0.85 mm Type: Case back gasket / O-ring Compatibility: Various watch case backs 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 Watch repair\u00a0\u2013 for professional and DIY use Suitable for\u00a0watchmakers,\u00a0repair technicians, and\u00a0DIY enthusiasts FAQs 1. Is this an original brand gasket set? 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