Fixing skirting boards and panels with construction adhesive
Contents
What you need
Project template “Bond strips, boards and panels”Short answer: Strips, panels and decorative profiles hold without drilling if three things are right: a load-bearing, dust- and grease-free substrate, the adhesive that suits the substrate and a fixing until the initial tack holds. Indoors on absorbent plaster, plasterboard or wood, an acrylic construction adhesive such as Ottocoll A265 TopFix is the standard solution. On smooth, non-absorbent or damp surfaces acrylic fails – a hybrid adhesive belongs there. Allow 24 to 48 hours until full load capacity.
Shopping list
Basic set (always required)
1. Cleaner and adhesion activator
Cleans, degreases and activates in one operation. Without this step the adhesive bonds to dust and grease instead of the substrate.
View Surface Activator
2. Construction adhesive
1K acrylic fixing adhesive for interior use, solvent-free, sandable and paintable after curing. Application +5 °C to +35 °C.
View A265 TopFix
3. Fixing tape
Adhesive strength 7.5 N/cm, removable without residue. Holds the component in position until the adhesive carries – without pressure marks in the surface.
View masking tapeOptional – depending on the installation situation
- Soudal Fix All High Tack – hybrid polymer for heavy components, smooth or damp substrates and outdoor use. Tensile strength 3.5 N/mm², resistant from -40 °C to +90 °C.
- Ottocoll ALLBERT – when the substrate is damp and cannot dry out, for example in the cellar. Building material class B2 to DIN 4102.
- Soudal Soudaseal 2K – when the bond has to bear loads quickly or the adhesive lies in a closed joint with no access to air. Requires a gun with a static mixer.
- Soudal PU Construct – for structural timber bonding outdoors, waterproof to D4 (EN 204).
- Soudal MontagePro 50A – water-based alternative to the A265, initial tack at least 50 kg/m².
- Soudal Primer 100 – bonding primer for porous, moisture-exposed substrates such as concrete, plaster and masonry.
- Otto Cleaner C – when you are bonding to aluminium profiles (bare, anodised or powder-coated).
Tools
- Cartridge gun (manual, compressed-air or battery-powered)
- Utility knife for cutting the nozzle
- Notched spreader, if you bond over the full area
- Lint-free cloths for cleaner and activator
- Spirit level, folding rule, pencil
- Damp cloth for fresh adhesive residues
Why the choice of adhesive decides the hold
Construction adhesives are not an interchangeable compound. The three common chemistries cure in completely different ways – and exactly from that it follows where they work and where they do not.
- Acrylate and dispersion adhesives (A265 TopFix, MontagePro 50A) cure by releasing water into the substrate. That is why at least one of the surfaces being joined must be absorbent. Between two tiles, on metal or on film they never dry through properly.
- Hybrid polymers (Fix All High Tack, ALLBERT) cure with atmospheric humidity. They need no absorbent substrate, tolerate moisture and are permanently elastic – the right choice for smooth, non-absorbent or weathered surfaces. Through-curing is about 3 mm in 24 hours, thick applications need correspondingly longer.
- Dual-component adhesives (Soudaseal 2K) cure chemically, independently of air and substrate. Only with this do you get a closed joint without access to air reliably cured through.
Rules to remember in practice: none of the adhesives mentioned adheres to PE, PP and PTFE. The A265 TopFix is additionally not suitable for glass, acrylic glass, mirrors, polyamide and metals without corrosion protection – for mirrors please read our guide to gluing mirrors, because there the back coating is the actual problem.
Step by step
Check the substrate
Press a strip of masking tape firmly onto the wall and pull it off with a jerk. If paint, wallpaper remnants or plaster dust stick to the tape, the substrate is not load-bearing – then even the best adhesive does not hold, but later tears the surface off with it. Why: A construction adhesive is only ever as strong as the weakest layer beneath it.
Check: Nothing but dust sticks to the tape. In addition, scratch test with a fingernail: the substrate must not chalk off.
Clean and activate
Sweep off dust, then apply the Surface Activator evenly in one direction with a lint-free cloth or brush and leave to flash off. Application temperature +5 °C to +25 °C. A slight white haze may remain; it does not impair adhesion. On porous concrete or plaster, use Primer 100 instead of the activator and wait at least 60, at most 240 minutes. Why: Films of grease and release agent are invisible to the naked eye and the most common cause of bonds that fall off after weeks.
Check: The cloth stays clean on the second wipe. On aluminium profiles always wipe lengthways, never in circles, and use a fresh cloth.
Fit the component and mark it
Cut the strip to length, cut mitres and hold the component dry against the wall. Mark the top edge with a pencil and check with the spirit level. Why: After application you only have a few minutes for correction – with A265 TopFix about 5 minutes while the adhesive is still wet, with MontagePro 50A around 15 minutes. After that nothing can be moved without destroying the bond.
Check: All parts lie cut to size and in installation order, the marking line is continuous and plumb.
Apply the adhesive
Cut the nozzle at an angle and insert the cartridge into the gun. Apply the adhesive to the back of the component – not to the wall, otherwise you smear the visible surface when setting it. Three variants are possible: in dabs, as a continuous bead or over the full area with the notched spreader. With dabs, Soudal keeps a spacing of at least 15 cm. Why: Dabs let air reach the adhesive and speed up curing with hybrid adhesives; a continuous bead gives more area but takes longer. The application temperature for the acrylic adhesives is between +5 °C and +35 °C, for Fix All High Tack between 0 °C and +40 °C.
Check: The quantity of adhesive is enough if, after pressing on, a narrow bead emerges at the side in at least two places – but not so much that it oozes out at the visible edge.
Set, press, pull off
Set the component at the marking line and press it on with even pressure over the whole length. With hybrid and PU adhesives, airing is recommended: press the part on, pull it off again immediately, wait about a minute and press it on again. With PU Construct the parts must be joined within about 4 minutes and then pressed firmly for about 15 minutes. Why: Through airing the adhesive begins to set and the initial tack rises considerably before the component has to carry its own weight.
Check: The component lies flat over its full area, there are no voids – tap it: a dull sound means contact, a bright sound means a void.
Fix in place
Every 30 to 50 cm, stick a strip of masking tape across the component onto the wall. The tape holds with 7.5 N/cm and can be pulled off again without residue. Why: Even adhesives with high initial tack need time; a vertically hanging panel otherwise slips down a few millimetres unnoticed during the first hour. For ceiling installation, additionally fix with props.
Check: After an hour apply the spirit level once more – a deviation can often still be corrected now.
Leave to cure and finish
Pull off the fixing tape only when the adhesive is sufficiently firm – as a rule after 24 hours. Remove fresh adhesive residues with a damp cloth for A265 TopFix, with water for MontagePro 50A; cured residues only with white spirit or mechanically. A265 TopFix can be sanded and painted over after curing, MontagePro 50A can be painted over with water-based systems, Fix All High Tack wet on wet. Why: Cured adhesive residues at the visible edge can later only be removed by damaging the surface.
Check: Light pull test at an uncritical end after 24 hours – the component must not move. Full load only after 48 hours.
Curing times at a glance
| Product | Correctable | Remove fixing | Fully loadable | Check |
|---|---|---|---|---|
| Ottocoll A265 TopFix | approx. 5 min while wet | after 24 hrs | after 24–48 hrs | Pull test at the component end, no give |
| Soudal MontagePro 50A | open time approx. 15 min | after 24 hrs | after 24–48 hrs | Adhesive bead has cured through, can no longer be pressed in |
| Soudal Fix All High Tack | until skin formation, approx. 5 min | after 24 hrs | approx. 3 mm through-curing per 24 hrs | Scratch test on the escaping bead: rubber-elastic, not tacky |
| Ottocoll ALLBERT | until skin formation | after 24 hrs | approx. 3 mm through-curing per 24 hrs | Test the bead with a fingernail: firm to the depth |
| Soudal PU Construct | joining within approx. 4 min | after approx. 15 min pressing | after 24 hrs | Foamed-up edge is hard and can be knocked off |
| Soudal Soudaseal 2K | short pot life, work quickly | much earlier than 1K | chemical, independent of humidity | Check the leftover material in the mixer: if it is hard, the joint is cured through too |
The figures apply to standard climate. Cold and thick applications lengthen the times, in some cases considerably.
Common mistakes – and how to avoid them
- Acrylic adhesive between two dense surfaces. Tile on tile, metal on plastic: the water has nowhere to go, the adhesive stays soft permanently. Solution: use a hybrid adhesive such as Fix All High Tack or ALLBERT, or with a closed joint the 2K adhesive.
- Not degreased. New profiles often carry a film of release agent from production. Always pre-treat with activator or cleaner.
- Too much adhesive. A thick bead does not cure through inside and pushes the component away from the wall. Better several narrow beads than one thick one.
- No airing with hybrid adhesives. Without pressing on, pulling off and pressing on again you reach only a fraction of the possible initial tack.
- Loaded too early. Shelves or towels on a component that has only been hanging for 6 hours: the bond migrates slowly without it being visible, and fails later.
- Wrong temperature. Below +5 °C most construction adhesives no longer apply cleanly. Fix All High Tack is the exception with 0 °C to +40 °C.
- Bonded onto PE, PP or PTFE. None of the adhesives mentioned here adheres to these plastics. Do an adhesion and compatibility test at an inconspicuous spot beforehand.
Frequently asked questions
Can I really fix skirting boards permanently without drilling?
Yes, if the substrate is load-bearing. Construction adhesives such as Soudal MontagePro 50A reach an initial tack of at least 50 kg/m² over the full area. For strips, panels and decorative elements that replaces nails and plugs completely – and leaves no holes in tiles or exposed concrete.
Which construction adhesive holds on damp substrates?
Ottocoll ALLBERT expressly adheres to damp substrates, where dispersion and acrylate adhesives fail. Soudal Fix All High Tack also adheres to damp surfaces and is additionally waterproof and seawater-resistant. Standing water, however, is tolerated by neither.
How long do I have to fix?
Plan for 24 hours before you pull off the fixing tape and 48 hours until full load. Hybrid adhesives cure about 3 mm in 24 hours – a thick adhesive bead therefore needs several days to reach the core.
Can I paint over construction adhesive?
Ottocoll A265 TopFix can be sanded and painted over after curing, Soudal MontagePro 50A with water-based systems, Fix All High Tack wet on wet. With silicone it is different – why is explained in our guide Painting over silicone.
Do I need a primer?
On smooth, non-absorbent surfaces the Surface Activator is enough, which cleans, degreases and activates at the same time. On porous and moisture-exposed substrates such as concrete, plaster or masonry you work with Primer 100 and observe the waiting time of 60 to 240 minutes.
How does construction adhesive differ from wood glue?
Wood glue joins two timber surfaces under clamping pressure and needs a precisely fitting joint. Construction adhesive evens out unevenness and carries immediately. For structural timber joints outdoors, PU Construct with D4 to EN 204 is the bridge between both worlds – more on this in the guide Which wood glue – D3 or D4?.
Further reading
More guides on this topic
All guides on “Bonding and assembly”
Instructions
Guide: bonding a mirror – the guide that does not ruin the mirror
Bond a mirror with mirror adhesive and primer so that the coating stays intact
Basics
Guide: bonding silicone – what holds and what does not
When silicone is enough as an adhesive, what it holds on and when a hybrid adhesive is better
Basics
Guide: using PTFE spray and Teflon spray properly
What PTFE dry lubrication is good for, how to apply it and when oil is better