Injection adhesive for natural stone tiles without silicone oils
Why injection adhesive without silicone oils is crucial for natural stone tiles
Natural stone tiles are among the most popular floor and wall materials in Danish homes. Their veining and surface texture offer an aesthetic that ceramic tiles rarely match. However, marble is a porous natural material with demands that differ from glazed ceramics – especially when tiles start to loosen. The same applies to granite, travertine, slate, sandstone, limestone, and other natural stone tiles, all of which react negatively to incorrect adhesive choices.
What happens when natural stone tiles loosen
Loose marble tiles, hollow-sounding tiles, and detached tiles typically occur due to insufficient adhesive, subsidence in the subfloor, or structural movements caused by temperature fluctuations.
A hollow sound under the tile is a sure sign: the empty sound you hear when tapping lightly on the surface means there’s no contact with the substrate. This symptom is often noted during a property inspection or in a condition report, where loose tiles are registered as a structural defect that should be remedied.
Hollow tiles and loose tiles should be repaired as soon as possible. Natural stone is heavy and brittle, and a tile without sufficient support can crack under stress. In wet rooms like bathrooms or utility rooms, water absorption in the substrate further increases the risk, as water penetrates the structure through cracked grout lines, causing moisture damage that is far more expensive to repair than the tile damage itself.
The problem with traditional adhesive products
Many traditional adhesive products contain silicone oils. On non-porous surfaces like glazed ceramics, this is unproblematic – but on natural stone, it is directly harmful. Marble, travertine, limestone, sandstone, slate, and granite tiles are porous and absorbent. Silicone oils penetrate the stone's structure, leaving discolorations that can become permanent. For example, a white Carrara marble is particularly vulnerable: even faint oil-penetrating stains appear as grayish or greenish shadows that spread from the tile edges over weeks and months.
Adhesives and sealants with oil content can permanently discolor all types of natural stone tiles. An injection compound for natural stone tiles must therefore be free of silicone oils and have an SDS-documented composition – precisely because the material cannot tolerate incorrect choices.
How to repair hollow and loose natural stone tiles
Adin Injection Technology is a gentle method for repairing loose natural stone tiles and is used by both professional tile setters and DIY enthusiasts. Instead of replacing the tile and re-installing it with tile adhesive, a 2–3 mm hole is drilled in the grout joint – not in the tile itself. The injection needles are attached to the injection cartridge and inserted into the hole, after which the low-viscosity adhesive is injected using a caulk gun, allowing the adhesive to spread into the air pocket under the tile. This technique preserves the original tile and restores the adhesive bond without damaging the surface.
Adin Glue – injection adhesive for natural stone tiles without silicone oils
Adin Glue does not contain silicone oils and can be used directly on various natural stone tiles such as marble, granite, travertine, slate, sandstone, and limestone without risk of discoloration. This makes the product one of the few on the market that solves problems with voids under natural stone tiles.
The product is based on two patented technologies: an injection mechanism that maintains correct pressure during application, and a highly elastic, low-viscosity adhesive that distributes itself in the void without penetrating the stone's pores. The adhesive is non-toxic and comes with SDS documentation, so the chemical composition is fully disclosed – a requirement that professional tile setters and craftsmen place on all adhesive and sealing products.
The curing time for adhesive for hollow natural stone can vary between 24 hours and a few weeks – however, the tile can be walked on shortly after injection.
FAQ - about injection adhesive for natural stone tiles
What are loose tiles, and what causes it?
Loose and hollow-sounding tiles occur when the adhesive bond between the back of the tile and the substrate is completely or partially broken.
The causes are typically insufficient tile adhesive during installation or structural movements due to temperature fluctuations. The result is a void under the tiles.
You can often detect the problem by tapping lightly on the surface – a hollow sound under the tiles is a clear sign of poor adhesion. Loose tiles are also frequently recorded in condition reports during property transactions.
Can I repair loose natural stone myself, or do I need a tiler?
You can repair loose natural stone and marble tiles yourself with Adin Glue injection cartridges, provided the tiles are not cracked.
The product is developed as a DIY solution, where you drill a 2–3 mm hole in the grout joint, attach the injection needle, and inject the adhesive directly into the void behind the tile.
On adinglue.dk, you can find a video guide that shows the process step by step.
Find the best injection compound for tiles without silicone oils
Adin Glue is an injection compound without silicone oils and is developed for repairing both ceramic tiles and natural stone tiles such as marble, granite, travertine, slate, and sandstone.
Silicone oils can penetrate porous natural stone tiles and leave permanent discolorations. Therefore, it is important to choose an injection adhesive that is suitable for natural stone.
Adin Glue comes with SDS documentation, is non-toxic, and certified for indoor use.
Does injection adhesive for tiles work both indoors and outdoors?
Yes, Adin Glue can be used for repairing loose tiles both indoors and outdoors.
The highly elastic injection compound is designed to handle structural movements and temperature fluctuations, ensuring a durable adhesive bond even under changing conditions.
Why is it important that adhesive for natural stone tiles does not contain silicone oils?
Natural stone tiles such as marble, travertine, limestone, slate, and granite are porous materials with high water absorption.
This means that the stone can absorb liquids and chemical substances directly into the material's structure.
Silicone oils in tile adhesives and injection adhesives can therefore penetrate the stone and leave permanent oily discolorations, which are very difficult to remove again.