Best Glue for Stone – Detailed Guide and Tutorial for Stone Adhesives

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Stone is a very hard yet brittle material, meaning that it can break as a result of heavy impact. If the damaged part is a beautiful marble slab, this can be annoying for the owner. Fortunately, stone can be repaired if you use the appropriate stone glue. You will also find that bonding stone slabs with a stone adhesive is not a problem either. This guide on stone glue will inform you on the best glue for stone and how to use these stone adhesives. 

 

 

 

Stone Glue for Marble

To glue marble, you will need the right stone adhesive. This depends on the intended use and the surrounding environment of the stone. You should also consider in advance whether the adhesive should be gap-filling. In this case, you do not need a pure adhesive, but a combined adhesive and leveling compound.

Another factor is the weight that the natural stone must withstand. If you have laid marble floor tiles, the adhesive used must be suitable for bearing a heavy weight. In outdoor applications, high levels of weather- and UV-resistance are essential for a durable adhesive seam.

Stone Adhesives

If you want to glue marble, you generally have a choice between the following adhesives:

  • Special Stone Adhesive: Stone glue is based on superglue and is particularly suitable for indoor use. With its help, smaller figures as well as large slabs can be joined and repaired with great strength.
  • Silicone Glue: This adhesive is more suitable for large and heavily loaded surfaces. It also has a gap-bridging effect.
  • Marble Tile Adhesive: This can act like a silicone adhesive and has a similar gap-filling effect.
  • Two-Component Epoxy Resin Adhesive: This adhesive is virtually the all-rounder. It has both a gap-filling and a high-strength bonding effect and can be used both indoors and outdoors. It also optimally withstands adverse environmental conditions. However, it is generally not UV-resistant, as it tends to yellow. If the adhesive for stone has to be used outdoors, a polyester-based adhesive would be better suited. Both types of adhesive can be mixed with colorants to match the exact shade of the stone to be bonded.

In principle, the above-mentioned stone adhesives can also be used for other types of stone, which is why we refrain from redundantly presenting these adhesives in the rest of the guide.

 

What Is Marble?

Marble is probably one of the most sought-after natural stones, and for good reason: its name comes from ancient Greek and means “to shimmer”. This noble material gives a classy look to any environment. However, its extraction is very complex, so marble has a proud price.

Precisely for this reason, you should be careful with it. Marble is one of the softer natural stones and can therefore be damaged quickly. Thus, it is good to know that the natural stone can be repaired. With the right stone adhesive, you can glue marble relatively easily. Even the installation of marble floor tiles will not pose any problems.

Choosing Stone Glue

 

Suitable Adhesive: PROCALIBER PRODUCTS Clear LCA Repair and Fill Kit

This stone adhesive can be categorized as a light-curing acrylic (LCA), which means that the substance will cure when exposed to an LED blue light. With a gel-like consistency, this adhesive is easy to use and will dry to a translucent finish. This finish can then be polished so as to bring out the natural patterns and colors of your marble.

You will not have to wait long for this stone glue to cure, as it will cure within a matter of minutes. Unlike epoxy, this adhesive will not yellow, and it is much more durable. This repair kit includes dispensing tips and a curing sheet. It also comes with gel-coated sandpaper, polishing paste, and a polishing cloth in order for you to achieve the best possible finish.

PROCALIBER PRODUCTS Clear LCA Marble Repair and Fill Kit
  • Light-curing acrylic nano-gel
  • Invisible chip filler for a variety of surfaces
  • Moldable, sandable, and can be polished to a high gloss
View on Amazon

PROS

 

  • Comes with everything you will need
  • Quick to cure
  • Dries clear 
  • Easy to use and produces professional results
  • Non-toxic and odorless
  • Durable
  • Can be used both indoors and outdoors

CONS

 

  • Does not work well on black granite
  • Curing time may be longer than advertized 

We can recommend the ProCaliber marble stone adhesive repair kit with a clear conscience.

 

Instructions for Gluing Marble

Gluing marble is a breeze if you use the right stone glue. First, clean the area to be glued. Carefully brush off any dirt and dust with a brush or, for larger glued areas, use a hand brush. If the areas to be glued are clean, test the adhesive in a place that is not immediately obvious to the observer – for example, on the underside. This will rule out the possibility of the adhesive leaving unsightly discolorations on the marble.

Marble Stone Adhesive

The break piece must be adjusted before the actual gluing process so that no edges or corners protrude. So, fit this into the break edge and use a hairdryer to blow the dust created by this process out of the cracks. The stone adhesive is then applied to both sides. Now, press the broken piece with firm pressure onto the corresponding spot and fix it if necessary. However, be careful not to damage the marble when fixing it.

As far as the curing time is concerned, observe the manufacturer’s specifications for the respective adhesive. If in doubt, give the adhesive seam a little more time than specified in the data sheet. In the last step, you can repair cracks that are still visible.

 

 

Granite Stone Adhesive

Bonding granite is just as possible as bonding other rocks. In principle, you need to follow the same basic principles as for bonding all substrates:

  • Choose the right adhesive
  • Thoroughly clean the substrates
  • Apply the adhesive appropriately
  • Observe the curing phase

Follow our “Gluing marble” section when choosing an adhesive.

 

What Is Granite?

The word granite comes from Latin and means “grain” – this word describes the natural rock optimally, because it contains many dark minerals. This so-called mica makes granite a visually appealing rock. It is rich in feldspar as well as quartz and extremely coarsely crystalline. Granite is one of the most commonly found rocks and can be mined practically all over the globe, which is of course reflected in its relatively low price.

Stone Glue

 

Suitable Adhesive: HIMG Light Cure Acrylic Surface Repair Kit

This stone adhesive for granite provides top-quality repairs to your granite surfaces within mere minutes. Working with LCA technology, this is a non-toxic and food-safe option for repairing any surfaces made out of granite, marble, or quartz.

The adhesive is ideal for smaller, penny-sized damages and will cure to a clear, yellow-resistant finish. In addition to not being toxic, this product also emits no strong odors and contains no harsh ingredients and chemicals. The transparent detail of this stone adhesive allows the natural appearance of your granite to show through, thus improving the overall appearance of your surface.

HIMG Clear LCA Surface Repair Kit for Granite
  • High-quality repairs in minutes
  • Non-toxic and approved for use in food prep areas
  • Works great on granite, marble, and quartz
View on Amazon

PROS

 

  • Easy to use
  • Fast curing time
  • Non-toxic and odorless
  • Transparent and will not yellow
  • Food-safe

CONS

 

  • Curing time is a bit longer than stated
  • Does not include a curing strip (have to use packing tape on the edge instead)

From us, the HIMG granite adhesive gets a recommendation, as its advantages are far more pronounced than its few disadvantages.

 

Instructions for Gluing Granite

When gluing granite, both substrate parts must first be thoroughly cleaned. After this, the adhesive is applied either over the entire surface or in generous beads. Both parts are fixed until the curing process is complete. After complete curing, the adhesive can be sanded down to remove any residue. Some stone adhesives, such as the HIMG granite adhesive that we recommended, will cure with an oily finish that can be removed easily with a damp cloth.

 

 

Glue for Stone Slates

Slate is also a natural stone that is very popular both in the domestic sphere and in the construction industry. It gives gardens in particular a slightly peculiar, but at the same time high-quality appearance and is a visual eye-catcher as a garden wall. Of course, it is difficult to drill through it. Slate also cannot be welded, which means that the only proven solution for the home user to join the stone permanently and safely is by using a suitable slate stone glue.

 

What Is Slate?

Slate is a natural rock of mudstone, the formation of which dates back 400 million years. The slates, which are quite sought after in the building industry, are so-called metamorphic rock. Such rock types were mineralogically changed by pressure and temperature increase in the earth’s interior. Nowadays, slate is a popular building material and is used, among other things, for:

  • Dry stone walls
  • Garden paths
  • Various countertops for kitchens or bathrooms
  • Stairs
  • Fireplace covers
  • Wall coverings
  • Material in the construction of facades

Slate Stone Glue

As a natural product, the appearance of slate slabs varies naturally. Their colors vary from gray to grayish black, bluish, greenish, or reddish. Slate is an extremely hard-wearing and durable material. It is weather-resistant as well as temperature-resistant and is extremely strong.

It can also be used in bathrooms and other rooms exposed to moisture, as it is impermeable to water. At the same time, it has a high heat storage capacity and is popular as a floor covering for underfloor heating systems. You can glue slate for this and similar purposes, provided the appropriate stone adhesive is used.

 

Suitable Adhesive: LOCTITE ProLine Premium Polyurethane Construction Adhesive

This stone adhesive is made up entirely of polyurethane, making it one of the strongest and most durable adhesive options. In fact, this product is advertized to be as much as eight times stronger than most other stone adhesives. It can be applied to both indoor and outdoor surfaces and is guaranteed to last as long as the surface itself. This product is VOC-compliant, making it completely safe for use. The stone glue itself is waterproof and can be painted, and can even cure in low temperatures.

LOCTITE ProLine Premium Polyurethane Construction Adhesive
  • Safe to use, repositionable and VOC compliant
  • Constructed of 100% polyurethane
  • 8 times stronger than your typical construction adhesive
View on Amazon

PROS

 

  • Extremely strong and durable
  • Long-lasting
  • Can be used indoors and outdoors
  • Safe to use and VOC-compliant
  • Waterproof
  • Can be painted
  • Will cure even in cold temperatures

CONS

 

  • Not compatible with all materials

Loctite’s premium polyurethane stone adhesive for slate is the perfect product for both indoor and outdoor slate projects, and we can assure you that it will stand the test of time!

 

Instructions for Gluing Slate

When bonding slate, the correct pre-treatment of the area to be bonded is just as important as with all other materials. Therefore, the substrates must be thoroughly cleaned of grease, dust, and any dirt. Corners and protruding edges should also be removed. Now, the substrates can be joined with the right slate adhesive. When doing so, you should cover the adjacent areas to avoid discoloration and adhesive residues adhering.

Applying Stone Adhesive

The stone adhesive is applied to the edges of the slabs as well as in the center. Ensure a wavy application in the middle area to minimize air pockets. In this way, the adhesive is optimally distributed into all areas. Alternatively, you can apply the adhesive generously over the entire surface using a spatula. Join the substrates with high pressure and align them if necessary. After the curing phase, which may vary depending on the adhesive, overhanging adhesive residues should be sanded off.

 

 

Gluing Stone Slabs in the Exterior

In outdoor areas, stone slabs have to withstand particularly adverse conditions. These include possible heavy weights and impacts due to garden furniture as well as weather-related influences.

Once you have mastered the appropriate work, you will be rewarded with an incomparable feast for the eyes in your outdoor area, because straight stone slabs are a real eye-catcher in any garden and on any terrace.

Stone Adhesive

 

What to Consider When Bonding Stone Slabs

It should be noted in particular that all the plates should lie flat. None of them should be laid higher or lower than the other plates. In damp or wet weather, you can protect the surface with a tarpaulin during the curing period. If dry and hot weather is more likely, keep the surface moist using the spray bottle. It is also extremely important to avoid air pockets and cavities under the stone slabs. Furthermore, all stone slabs should be brushed off and watered.

Applying Stone Glue

 

Suitable Adhesive: PC PRODUCTS PC-Concrete Two-Part Epoxy Adhesive Paste

You can use this two-part epoxy stone adhesive paste in order to fill and fix cracks in concrete as well as to anchor bolts both under and above the water line. The paste is moisture-resistant and can be applied indoors, outdoors, and on vertical surfaces. You will have 20 minutes to work with this concrete stone glue paste before it starts to dry, and you need only wait four hours at the correct temperature for it to cure properly.

PC PRODUCTS PC-Concrete Two-Part Epoxy Adhesive Paste
  • Two-part epoxy adhesive paste to fill and repair cracks in concrete
  • High-tack paste resists moisture and can be used in vertical applications
  • Can be used on indoor and outdoor applications
View on Amazon

PROS

  • Moisture- and water-resistant
  • High level of adhesion 
  • Can be used on vertical surfaces
  • Generous working time
  • Easy to use

CONS

  • Not much in the tube

 

Instructions for Gluing Stone Slabs

We describe below how to remove and re-install stone slabs on concrete. Of course, when gluing stone slabs, the right adhesive is of great importance. Apart from that, you will need the following materials for this activity:

  • A hand brush
  • A notched trowel, preferably 10×10 mm
  • A broom
  • One brush
  • A chalk pencil
  • One spray bottle
  • A mortar bucket
  • An electric agitator
  • A trowel
  • A flat chisel
  • A mitten
  • A spirit level
  • Possibly knee pads
  • Safety glasses, work gloves, and long-sleeved clothing

Ensure a temperature range of between 41° and 86° Fahrenheit (5° and 30° Celsius) for optimum processing of the adhesive. It is essential that the stone slabs are bonded properly without any remaining cavities, otherwise frost damage may occur after water penetration.

First, mark all the natural stone slabs with the chalk pencil. This is especially advisable for uneven slabs, as it makes it easier to lay them in the exact position. A good alternative to this step is to photograph the corresponding area with a smartphone.

Now, you can pick up the slabs and scrape out the joints between them to clean them from dirt and mortar particles. Use the flat chisel for this purpose. It is best to lay out the slabs so that you have them at hand in the right position later. This will make your work easier.

Once the concrete slab is completely exposed, it must be cleaned of coarse impurities and dirt. After this, the concrete layer may be reduced if it is too thick. As a rule, the stone adhesive must be applied with a layer thickness of about 3 mm.

Now, use the broom and hand brush or, as an alternative, an industrial vacuum cleaner to remove all impurities from the concrete slab. The substrate must be completely clean so that the stone adhesive can develop its adhesive properties perfectly. For this reason, the natural stone slabs are also thoroughly cleaned. The stone adhesive can now be mixed in the mortar bucket, if this step is necessary. Follow the manufacturer’s package instructions when doing so.

Mixing Stone Adhesive

Dampen the laying surface generously using the spray bottle. Make sure that the water is applied evenly, but without puddles. This step is particularly necessary in warm weather so as to extend the working time of the stone adhesive. In this way, you can work in a relaxed manner and will not have to hurry too much.

The stone adhesive can now be applied to the substrate with the notched trowel. The adhesive is applied over the entire surface. Immediately afterwards, the adhesive is also applied to the back of the stone slabs.

Each coated slab is laid immediately and pressed on with appropriate pressure. To ensure that the stone slabs lie flat, you can use a spirit level. The joints are immediately cleaned of excess adhesive so that they can be optimally grouted later.

Best Glue for Stone

The curing phase of the stone adhesive is about three days, but in the case of doubt, rather opt for four.

 

 

Frequently asked Questions

 

Which Adhesive Works on Stone?

There are various types of adhesives for bonding stone. However, the most suitable is a two-component epoxy resin adhesive or a polyester adhesive. Special stone adhesives are also available.

 

Is It Possible to Glue Slate?

Slate tiles can be joined well with the right adhesive. Ideally, use a two-component epoxy resin adhesive for this purpose and apply it over the entire surface or in waves.

 

How Do I Glue Metal to Stone?

If you want to bond metal to stone, you should use a high-quality epoxy resin adhesive. This glues many different materials and is extremely durable as well as resilient.

 

Bonding natural stone is absolutely no problem with the right stone adhesive. You only need to pay attention to various details, which we hope we have been able to help you with in our stone adhesive guide.

 

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