Waterproof Case Back Gasket Compatible with Casio F91W

Waterproof Case Back Gasket Compatible with Casio F91W

Restore proper sealing performance and water resistance with this replacement waterproof case back gasket, designed for watch cases compatible with the Casio F91W series.

Manufactured from durable sealing material with precise tolerances, this gasket is engineered to match the original dimensions, compression profile, and seating characteristics, helping ensure secure case back installation and reliable sealing performance when installed correctly.

Designed specifically for daily wear and sports chronograph applications, the gasket provides dependable resistance against moisture, dust, sweat, and environmental exposure, making it ideal for replacing worn, flattened, hardened, or damaged originals during servicing or battery replacement.

(Not an OEM part and not affiliated with Casio — compatible replacement only.)

Compatible Models

Suitable for selected Casio models including:

• Casio F91W
• F91W-1
• F91WG
• F91WM
• Other compatible F91W series models

Note: It is recommended to pressure test your watch after gasket replacement to ensure continued water resistance.

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