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[piatotsini]

.

 

[windsor-aquatic]

What is the glass thickness? If it's 10mm you won't have a problem rimless. If it's 6mm, it needs bracing, and bonding glass and plastic/acrylic is not too successful, as the bonding requirements for each are different.

 

[windsor-aquatic]

Yes, a central brace would do the job, but make sure you use a silicone that's suitable for aquatic use.