Glass adaptor - gasket, D50, Silicone

The Strofix glass adaptor gasket D50 silicone is a silicone sealing ring designed for use in Strofix D50 glass adaptor assemblies, placed between the stainless-steel cover or distancer and the glass panel surface. Manufactured from silicone rubber, Ø 48 mm outer diameter, available with an internal hole diameter of Ø 10.2 mm or Ø 12.2 mm, and a thickness of 1 mm or 2 mm. The gasket is a flat type without a flange.

The gasket cushions the contact between the metal adaptor components and the glass, preventing direct metal-to-glass contact that could cause stress cracks or scratches. Silicone offers high flexibility and maintains its elastic properties across a wide temperature range, making it suitable for both indoor and outdoor installations. Two gaskets are typically required per adaptor point — one on each side of the glass panel. The gasket is sold individually.

Select the internal hole diameter to match the screw or stud used in the adaptor assembly: Ø 10.2 mm for M10 screws or Ø 12.2 mm for M12 screws. Select the thickness based on the required gasket profile: 1 mm for a thinner cushion where space is limited, or 2 mm for standard applications.

Use cases:

• Sealing D50 glass adaptor assemblies on balustrades, partitions, and façades
• Replacing worn or compressed gaskets in existing Strofix D50 installations
• Cushioning glass-to-metal contact in point fixing assemblies
• Applications requiring a thinner 1 mm gasket where standard 2 mm thickness is too thick
• Installations where silicone is preferred over EPDM for its flexibility or chemical resistance

FAQ:

What is this gasket used for?

The gasket sits between the stainless-steel adaptor component (cover or distancer) and the glass panel in a Strofix D50 point fixing assembly. It prevents direct metal-to-glass contact, cushions clamping pressure, and provides a seal. Two gaskets are typically used per fixing point — one on each side of the glass.

Which internal hole diameter should I choose?

Select the diameter to match the screw or stud used in the D50 adaptor assembly: Ø 10.2 mm for M10 screws or Ø 12.2 mm for M12 screws. Check the screw size of the adaptor assembly before ordering.

Which thickness should I choose?

Select 1 mm for a thinner gasket where space is limited or where a reduced cushion is sufficient, or 2 mm for standard applications. The 2 mm thickness matches the standard gasket thickness used across the Strofix range.

How does this silicone gasket differ from the EPDM flat D50 gasket?

The material is different: this gasket is silicone, while the alternative is EPDM rubber. Silicone typically offers greater flexibility and a wider operating temperature range. This silicone gasket also offers a 1 mm thickness option, which is not available in the EPDM D50 flat gasket. The EPDM version additionally offers a Ø 8.2 mm inner hole variant, which this silicone gasket does not.

Which Strofix glass adaptors is it compatible with?

This gasket is sized for the Strofix D50 glass adaptor range (Ø 50 mm cover, Ø 48 mm gasket body). It is not compatible with D30, D40, or other adaptor sizes.

How often should the gasket be replaced?

Silicone gaskets maintain their sealing properties over many years under normal conditions. Replacement is recommended if the gasket shows visible compression set, tearing, or no longer provides a seal against water ingress.

About glass adaptor gaskets

A glass adaptor gasket is a rubber or silicone washer that sits between the metal adaptor body and the glass surface, preventing direct steel-to-glass contact. It cushions the clamping force, compensates for minor surface irregularities and protects the glass edge around the drilled hole from chipping or stress cracking under load.

Strofix supplies glass adaptor gaskets in six sizes — D30, D40, 40×40, D50, D60 and D70 — in two materials: EPDM rubber and silicone. Both flat gaskets and gaskets with an integrated flange are available; flanged variants provide additional coverage around the hole perimeter.

The correct gasket depends on the adaptor diameter, the required material and whether a flanged or flat profile is needed for the assembly.