Rubber for slot tube, glass 21,52mm

The Strofix rubber for slot tube, glass 21,52mm is a clamping rubber gasket for glass-top handrails, sized for 21.52 mm glass panels. It fits the slot (channel) of the 40 × 40 mm and Ø42.4 mm handrail profiles, cushioning and gripping the glass edge within the rail. Made from rubber with a U=24 profile. Priced per metre.

In a glass-top handrail, the rail profile sits over the top edge of the glass panel via a channel, and this rubber gasket fills the gap between the glass and the metal slot. It grips the glass securely, absorbs vibration and movement, and protects the glass edge from direct metal contact. The 21.52 mm size is the thickest in the range, matched to 21.52 mm laminated safety glass — a heavy specification used for tall barriers, high-load balustrades, and structural glass balustrades. It pairs with the 21.52 mm channel profile. Thinner gaskets in the range cover glass from 8 mm. The gasket is supplied by the metre and cut to the length of the handrail run.

Use cases:

• Glazing gasket for 21.52 mm glass in a slot-tube (channel) handrail
• 21.52 mm laminated safety glass balustrade handrails
• Tall barriers, high-load, and structural glass balustrades
• Cushioning and gripping the glass edge inside the handrail profile
• Glass-top handrail assembly on 40 × 40 mm and Ø42.4 mm profiles

FAQ

What glass thickness does this rubber fit?

21.52 mm glass — the thickest in the range, for heavy laminated safety glass. Thinner gaskets cover glass from 8 mm.

Which handrail profiles does it fit?

The 40 × 40 mm and Ø42.4 mm handrail profiles — it fits the slot (channel) of both.

Which channel profile does it pair with?

The 21.52 mm channel profile in the Handrails For Glass range.

What is the profile designation?

U=24, made from rubber.

How is it sold?

By the metre — the price shown is for 1 m. Order the length to match the handrail run.

What does the gasket do?

It fills the gap between the glass and the metal channel, gripping the glass, absorbing movement, and protecting the glass edge from direct metal contact.

About Handrails

A handrail is the graspable top rail of a balustrade system, running along the upper edge of railing posts or the top of a glass panel to provide a secure handhold. The handrail profile sits on handrail supports or is fixed directly to the glass via a channel bar, and fittings at each joint — elbows, end caps and axial connectors — allow the rail to follow corners, stair pitches and direction changes.

Strofix supplies handrails and handrail components in two profile systems: a 40×40 mm flat square profile and a Ø42.4 × 15 mm oval (D-shaped) profile for glass-top mounting, both in AISI 304 stainless steel with a satin finish.

The range includes applied handrail lengths (2500 mm), channel bars in AISI 304 and aluminium for glass-top fixing, clamping rubbers for glass thicknesses from 8 to 21.52 mm, end caps, axial fastenings, handrail fittings, horizontal and vertical 90° fittings, and flush adjustable elbows. The correct components depend on handrail profile, mounting method (post-top or glass-top) and the railing layout.