Grab Adhesive & Construction Adhesives

Grab adhesive, also sold as construction adhesive, panel adhesive, or “no more nails” type products, is a thick, fast-bonding compound designed to fix materials together without screws, nails, or clamps. A single 310 ml cartridge, applied to a clean surface, can hold cladding panels, skirtings, mirrors, and worktop off-cuts with impressive permanence.

The category covers several chemistries, and choosing the wrong one is a common (and expensive) mistake. This guide explains the main types, their strengths and limitations, and the best applications for each.

How Grab Adhesives Work

Unlike PVA or standard contact adhesives, grab adhesives are formulated to provide immediate mechanical grip on contact, the “grab”, while continuing to cure from the outside in. Cure is quoted as a depth per day, not a fixed time: Soudal’s hybrid polymer adhesives cure at roughly 2 to 3 mm every 24 hours, so a thin bead is through in a day and a 10 mm one takes the best part of a week.¹² They’re typically applied by skeleton gun from a 290 ml or 310 ml cartridge, though 80 ml and 125 ml squeeze tubes and 400 ml and 600 ml foil bags are available.²

The grab action comes from a high initial tack that holds the item in place while the adhesive cures. This means you don’t need to wedge or prop most fixings, the adhesive does the holding. That said, “no-clamp” is an aspiration rather than a guarantee: very heavy, smooth-faced materials often still need temporary support.

Types of Grab Adhesive

Solvent-Free (MS Polymer / Hybrid)

Modified silane (MS polymer) adhesives are currently the most versatile construction adhesive chemistry available to the UK market. They’re solvent-free, low-odour, and combine the flexibility of silicone with the paintability of acrylic. They adhere to almost all building materials, timber, plasterboard, concrete, steel, and most plastics, and remain permanently flexible after curing.

MS polymer adhesives are the first choice for most professional applications and the best all-rounder for DIY.

Typical initial grab: manufacturers quote this as a weight per square metre of bonded area. Soudal’s highest-tack hybrid polymer is rated at more than 200 kg/m², which is about 2 kg on a 100 cm² patch, and it reaches a hand-tight bond in 30 minutes.¹
Full cure: about 3 mm of depth per 24 hours¹
Flexibility after cure: High. A high-tack grade cures hard, 70 ± 5 Shore A, while a flexible grade is softer at 40 ± 5 Shore A with far more stretch, which is the trade-off between an adhesive and a movement joint¹³

Solvent-Based (Traditional Neoprene)

Older neoprene or polychloroprene-based grab adhesives (such as Evode Evo-Stik variants) are fast-grabbing and very strong, but they emit VOCs (volatile organic compounds) and can attack expanded polystyrene (EPS) foam, PVC, and some soft plastics. They’re less common now, partly due to environmental regulations and partly because MS polymers have largely superseded them.

Note: Check compatibility before use on plastics or foam. Published initial grab figures for neoprene adhesives are not directly comparable with the kg/m² figures hybrid polymer manufacturers quote, so compare datasheets from the same maker rather than across chemistries.

Water-Based (Acrylic Construction Adhesive)

Water-based grab adhesives are lower strength but safer to use near polystyrene, painted surfaces, and in confined spaces. They’re the right choice for coving and decorative EPS mouldings, where a solvent-based product would dissolve the material. Drying time is longer and they’re more sensitive to moisture on the substrate.

Full cure: longer than a hybrid polymer, and slower again in cold or humid conditions, because the water has to leave the joint rather than enter it

Product Comparison

Tile adhesives sit in a different family and carry their own classification. BS EN 12004-1:2017 splits them into cementitious, dispersion and reaction resin types and sets the letter and class marking on the tub, which is where the C, D and R codes come from; it does not tell you how to design or install the tiling.⁴

Specific Applications

Skirting Boards and Architraves

Decorator’s grab adhesive (MS polymer or water-based) is widely used alongside a few panel pins to fix timber skirtings. Apply a continuous bead or spot pattern to the back of the skirting, press into position, and tap in pins at each stud if required. The adhesive compensates for a wavy or irregular plaster wall, bridging gaps of up to 10–15 mm.

Cladding and Panelling

For MDF wall panels, tongue-and-groove timber, or composite cladding, an MS polymer adhesive applied in vertical stripes (one bead per 200–300 mm of panel width) provides a strong, flexible bond. Apply to the panel, leave for a few minutes to become tacky (known as “flashing off”), then press into position.

Mirrors

Mirror adhesive is a specialist sub-category. Standard solvent-based adhesives can corrode the silver or aluminium backing on mirrors, leaving black spots over time. Always use an adhesive specifically labelled as safe for mirrors, these are typically MS polymer or neutral-cure formulations. For large or heavy mirrors (over 10 kg), supplementary mechanical fixings (mirror clips or screws through the frame) are advisable regardless.

Coving and Decorative Mouldings

Use a water-based adhesive for polystyrene (EPS) coving. Apply to both the ceiling and wall faces of the coving, allow to tack slightly, then press firmly into position and support for 20–30 minutes while the adhesive grabs.

External Cladding and WBP Applications

Check the adhesive’s stated temperature range and weather resistance. External applications require a product with extended waterproof performance, most MS polymers will specify outdoor suitability, but verify the datasheet.

Cost Guide

Coverage varies considerably with application method. Spot bonding (dots every 150–200 mm) uses less adhesive and is often sufficient for light panels; full-coverage bonding is better for waterproofing or where the surface is uneven.

Surface Preparation

Bond strength is dramatically affected by surface condition. For best results:

• Surfaces must be clean, dry, and free of dust, oil, and loose material.
• New plaster should be sealed with a coat of diluted PVA and allowed to dry before applying grab adhesive.
• Very smooth, non-porous surfaces (glazed tiles, glass, polished metal) benefit from light abrading with 120-grit sandpaper.
• Primed or painted surfaces generally bond well; powdery or flaky paint will fail before the adhesive does, strip back to sound substrate.
• Cold surfaces significantly slow cure time. Soudal gives an application temperature range of +5°C to +35°C for its hybrid polymer adhesives, with the cured product then serviceable from -40°C to +90°C.¹²

Safety and Environmental Notes

MS polymer and water-based adhesives are significantly safer to work with than older solvent-based products. However, even low-VOC products should be used in well-ventilated spaces. Wear nitrile gloves, cured adhesive is very difficult to remove from skin. Clean tools immediately after use with white spirit (solvent-based products) or water (water-based), before the adhesive skins over.

Most construction adhesives are not recyclable through standard household waste. Check the cartridge label for disposal guidance, partial cartridges should be allowed to fully cure before disposal in general waste.

When Grab Adhesive Isn’t Enough

Grab adhesive is excellent for light-to-medium loads on well-prepared surfaces. It should not be the sole fixing for:

• Structural timbers (use mechanical fixings)
• Anything load-bearing over people (shelves, stairs, handrails)
• Very heavy panels or stone (over approximately 15 kg/m² without supplementary fixings)
• Applications subject to high continuous vibration

When in doubt, use adhesive in combination with mechanical fixings rather than instead of them.