Invisible joint

Invisible joint (zero welding): un principio, diferentes nombres

The technology of welding PVC frames has moved significantly in recent years. Window manufacturers refer to it by different names — invisibile, zero discord, possibly invisible weld/V-perfect But the principle is always the same:

perfect fit of the material and elimination of visible weld milling on the corner of the window.

The result is clean, modern and significantly more elegant than traditional welding.

Standard unmilled joint vs invisible SULKO joint

Common unmilled joint

Most manufacturers use classic welding of PVC profiles, where surpluses of material are simply milled off. Resultat:

• visible up to 3mm wide line on the corner,
• ,
• less clean and less aesthetic detail,
• with dark decor very distracting effect.

This procedure is still the most widespread, as it is fast and unpretentious in technology.

Invisible link SULKO

Unlike the classic joint, SULKO technology creates:

• perfectly clean corner without a visible caterpillar,
• Homogeneous appearance that goes with the decor,
• Aesthetics of premium windows,
• na,
• Improved mechanical stability in the long term.

With wood decor, anthracite and black frames, the difference is immediately noticeable — the corner looks elegant, modern and perfect.

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Why we use this technology and why most manufacturers do not use it

Invisible joint requires:

• modern welding lines,
• precisione tecnologia,
• experienced team,
• significantly higher process accuracy.

Therefore, many manufacturers have not yet implemented it or use hybrid solutions that are not aesthetically pleasing at the level of a truly invisible joint.

SULKO has long invested in technologies that push the standard of the entire industry. Invisible joint is one of those details that the customer recognizes at a glance.

Invisible joint or zero discord? The difference is in execution

Some manufacturers use the designation zero discord, but the resulting design is often still based on classical welding with the rest of the material milled off.
At SULKO we use technology that creates a truly smooth and uniform jointand therefore we refer to it as unseen.

Per il cliente, questo significa:

• cleaner design,
• superiore di qualità,
• Aesthetics at the level of modern architecture.

Invisible joint is an ideal option for:

• modern homes with an emphasis on design,
• large format windows,
• dark profiles where details stand out,
• reconstrucción, dove la aesthetica va ser significativamente manifestado,
• premium interiors.

Invisible SULKO joint shows that even the most technologically demanding part of a window can be framed with care — making it stand up both in technique and design.