Assembly adhesive vs. drilling – which fastening method is the better choice?

Assembly adhesive – fastening without drilling

Assembly adhesives enable concealed fastening without screw or plug heads on the visible surface. This can be a decisive advantage particularly for decorative components, cladding and sensitive surfaces.

• No visible fasteners: Screw or plug heads do not appear on the visible surface.
• No fastening holes: The component being installed does not necessarily have to be drilled through for fastening.
• Clean appearance: Particularly suitable for cladding and decorative elements.
• Distributed load transfer: Loads can be distributed across several beads or bonding areas.
• Different materials: Suitable adhesives can join different materials together.

You can find suitable assembly adhesives directly from S-Polytec.

Important: An adhesive bond is only as reliable as the substrate, adhesive and preparation. Load-bearing capacity, material compatibility and intended use must suit the specific project.

Drilling and screwing – mechanical fastening

Mechanical fastenings using screws, plugs or other connecting elements are particularly suitable when high loads must be transferred or clearly defined mechanical securing is required.

• Direct mechanical connection: The load is transferred through the screw, plug or fastening system.
• Immediately loadable: There is no need to wait for an adhesive to cure.
• Easy to control: The type and number of fastening points can be planned precisely.
• Removal possible: Many screw connections can be loosened again later.
• Suitable for high loads: With a suitable substrate and correctly designed fastening, high loads can be accommodated.

Typical applications: Shelves, wall cabinets, TV mounts, load-bearing structures and other components where mechanical fastening is structurally required.

Assembly adhesive or drilling – a direct comparison

Decisive factor: Neither bonding nor drilling is inherently better. The right fastening method depends on the load, substrate, material, application and desired appearance.

When is bonding suitable?

• Concealed fastening: Screws or plugs should be avoided on the visible surface.
• Decorative components: Trim, panels, cladding or other design elements are being installed.
• Avoid drilling: The component or substrate should not be drilled unnecessarily.
• Large contact area: The joint can be made over a sufficiently large bonding area.
• Suitable substrate: The surface is sound, clean and compatible with the adhesive used.

Rental property: Bonding does not automatically mean damage-free removal. Depending on the adhesive and substrate, coatings, wallpaper or other surfaces can be damaged during later removal.

When are drilling and screwing suitable?

• High loads: Heavy components must be held reliably.
• Safety-relevant installation: The fastening must be clearly definable from a structural perspective.
• Immediate loading: A curing time is not practical.
• Removal required: The component should be easy to remove again later.
• Unsuitable bonding surface: The substrate does not provide reliable conditions for bonding.

Examples: Wall cabinets, heavy shelves, wall brackets and load-bearing components should be installed using a fastening system suitable for the load and substrate.

Combining bonding and screws

In certain constructions, adhesive and mechanical fastening can be used together. The two joining methods perform different functions.

Do not combine indiscriminately: Additional bonding does not automatically make an unsuitable screw connection safer. Likewise, a single screw does not replace a correctly designed adhesive joint. For structural applications, the entire fastening concept must be coordinated.

Common mistakes when choosing between bonding and drilling

• Deciding only by weight: Leverage, substrate and fastening area also influence the load.
• Not checking the substrate: Loose coatings or unsuitable building materials can impair both fastening methods.
• Choosing the wrong adhesive: Not every assembly adhesive is suitable for every material and application.
• Using the wrong plugs: Plugs and screws must suit the relevant wall or building material.
• Ignoring curing time: Bonded components must not be fully loaded too early.
• Underestimating removal: Adhesive joints can be considerably more difficult to remove later than screw connections.

Assembly adhesive or drilling: the key points summarised

Bonding is particularly suitable for concealed fastenings, decorative components and applications with a sufficiently sound bonding surface. A prerequisite is always an adhesive that suits the material and substrate.

Drilling and screwing remain the suitable solution especially for high loads, safety-relevant components and constructions with a defined mechanical fastening.

The decisive question is therefore not which method is generally better, but which fastening method is technically and practically appropriate for the specific application.

Frequently asked questions about bonding or drilling