Best Adhesive for Concrete
With so many different adhesives available, what is the best adhesive for concrete. We’ll explain why Adiseal adhesive & sealant is the best adhesive for bonding different items including concrete to wood, metal, stone, plastic, tile, cable, polystyrene, masonry, glass as well as many other items to glue to concrete.
Which adhesive to use on concrete
There are many adhesives available that will bond to concrete but to achieve a strong long lasting bond the correct construction adhesive needs to be used.
Why Adiseal is the best adhesive on concrete
There are many reasons why Adiseal construction adhesive & construction sealant is the best product to bond items to concrete.
- Adiseal is the record breaking strongest adhesive & sealant. It proved it’s the best in an independent adhesive strength test by Ultimate Handyman.
- Adiseal stays permanently flexible so it will absorb any vibration and allow any items to expand & contract without the construction adhesive becoming weak.
- Adiseal is waterproof so it is also suitable for use outside.
- As long as the surface is clean of any dust, grease, paint or any other dirt, priming the material should not be required.
- It does not stain or bleed into stone or masonry.
- Adiseal has very high gap fill properties.
- Has high initial grab meaning temporary supports may not be required while the construction adhesive cures. Adiseal Hi-Grab has even higher grab than the standard product, see below for details.
- With Adiseal, the concrete does not require sealing prior to applying Adiseal.
In the independent adhesive strength test by Ultimate Handyman, Adiseal was over 3 times stronger than the nearest competitor. In fact it was so strong that the screws holding the test rig down started to rip out forcing the test on Adiseal to be stopped.
Adiseal Adhesive & Sealant vs Adiseal Hi-Grab
Adiseal adhesive & sealant has high initial grab but for even more grab use the Adiseal Hi-Grab adhesive. The final bond strength of both construction adhesives is similar.
Adiseal Hi-Grab is very useful when trying to bond heavy items to a vertical surface where the item is likely to slide down the surface without temporary supports to hold it until the adhesive has cured. With the Hi-Grab construction adhesive, the adhesive grabs straight away, eliminating the need for temporary supports even in more heavy applications.
Adiseal Hi-Grab also has even higher gap fill than the standard Adiseal adhesive & sealant. Due to Adiseal Hi-Grab adhesive having a thicker consistency, a lot higher force is required to push the item to the surface you are bonding it to. If there is no need for extra high initial grab or if temporary supports can be used then it is recommended to use the standard Adiseal adhesive & sealant. This will allow the 2 surfaces to be pushed closer together resulting in a stronger bond.
Problems with epoxy adhesives
There are several problems with using epoxy adhesives on concrete. Listed below are the main problems of epoxy adhesives.
- Although epoxy adhesives might initially bond the item to a concrete surface, epoxy adhesives are not flexible meaning the bond will become weaker over time. Air temperature & moisture changes cause items to expand & contract putting extra forces on an adhesive. If the adhesive is not flexible it will become weak & brittle, then eventually break.
- Epoxy adhesives also come in 2 separate components which require mixing. To achieve optimum epoxy adhesive properties, the 2 components need to be the correct ratio therefore require careful measuring. They also need to be mixed thoroughly together. If these 2 are not done then the optimum properties of the epoxy may not be achieved.
- Epoxy adhesives have lower initial grab than Adiseal, meaning temporary supports will usually be required whilst the epoxy adhesive cures. This increases time & money with extra labour cost.
Problems with mastic adhesives
Just like epoxy, mastic adhesives also have many problems when being used as an adhesive on concrete. Listed below are the main problems of mastic adhesives.
- The main problem with mastic adhesive is that the bond is weak in the 1st place. A mastic adhesive might be suitable at sticking light items indoors but will fail at more heavy duty applications.
- Another problem with mastic adhesives are they are not waterproof. This means they are not suitable for use where there will be water like bathrooms, kitchens or outdoors.
- Just like epoxy, mastic adhesives are not flexible meaning the already weak bond will become weaker over time.
- The initial grab of the mastic adhesive is also low meaning temporary supports will be required, increasing time & labour cost.
Problems with contact adhesives
Contact adhesives may be suitable in sticking light sheets to a surface but won’t not suitable for more heavy duty applications. There are a number of problems with contact adhesives.
- Contact adhesives have low initial grab meaning temporary supports will be required until the adhesive has cured.
- Contact adhesives also has low gap fill meaning if there is a gap in certain places between the 2 surfaces of the items being bonded, the contact adhesive will not stretch between the 2 surfaces. This will create a much weaker bond as only in a few places where the surfaces are very close together will the adhesive successfully bond.
- As concrete is porous it will require sealing first so that it does not soak up any contact adhesive.
Problems with using glue on concrete
Glues are generally suitable at sticking small items to smooth surfaces but not for more heavy duty applications like bonding items to concrete. For more heavy duty applications, a construction adhesive like Adiseal will be required. Glues have lower gap fill, initial grab, bond strength, flexibility & other problems compared to Adiseal adhesive & sealant when trying to stick items to concrete. As concrete is porous it will require sealing first so that it does not soak up any glue.
How to bond wood to concrete
Adiseal will successfully bond both softwood & hardwood to concrete creating a strong & long lasting bond in both interior & exterior applications. Prior to applying the adhesive, it is vital to have clean surfaces where the adhesive will be applied between the wood to concrete. Make sure both surfaces are free from any dust, grease, paint or any other dirt.
On our concrete demonstration block shown above, before applying the adhesive we have thoroughly brushed the concrete using a paint brush to make sure any dust is removed.
With wood to concrete, simply apply the adhesive between the wood to concrete and firmly push together. If there is potential of water in the area the item is being bonded to, Adiseal needs to be applied in thin vertical strips. This allows any water to run down between the strips instead of building up behind the item. In cold temperatures water will turn to ice which expands and pushes the surfaces apart.
There should be no need for temporary supports to hold the wood to concrete but if the wood does start to slide, then temporary supports may be required until the adhesive has cured.
Wood tends to soak up moisture in the air meaning it will expand. Using a flexible adhesive when sticking wood to concrete is very important.
For safety reasons on extra heavy wood, mechanical fixings also need to be used between the wood to concrete in conjunction with Adiseal when used on to bond items to vertical & overhead applications.
How to bond metal to concrete
Adiseal will successfully bond all metals to concrete in interior & exterior applications. As described above, it is vital to have clean surfaces where the adhesive will be applied to.
Some metals may have an oil applied to it to stop the metal from rusting. This oil needs to be removed before the adhesive can be applied to between metal to concrete. Adisolve is ideal at removing oil, grease, tar & many other stubborn deposits.
To achieve a strong bond, lightly scratch the surface of the metal where the adhesive will be applied to. This will increase the surface area allowing for a stronger bond. Clean the surface thoroughly after scratching the surface to remove any loose metal.
Once the surfaces are clean, simply apply the adhesive between metal to concrete and firmly push together. Temporary supports may be required if the items slide down, or use the Adsieal Hi-Grab adhesive for more grab.
For safety reasons on extra heavy metal items, mechanical fixings also need to be used between metal to concrete in conjunction with Adiseal when used to bond items to vertical & overhead applications.
How to bond plastic to concrete
Adiseal is suitable at bonding most types of plastics to concrete. As with metal, clean the plastic thoroughly to make sure any dust, oil, grease, paint or any other dirt is removed before applying the adhesive. Scratching the surface of the plastic will increase the surface area increasing the strength of the bond between plastic & concrete.
After applying the adhesive, firmly press the item onto the concrete.
Adiseal is also when used to glue artificial grass to concrete.
How to bond stone, brick, tile or masonry to concrete
Adiseal is suitable at bonding stone, brick, tile or masonry to concrete in interior & exterior applications. Brush of any dust thoroughly prior to applying the adhesive. With Adiseal, priming of the stone, brick or masonry is usually not required as long as the surfaces are thoroughly clean.
A common problem when using other adhesives or glue for stone is they tend to bleed into the stone, as stone is a porous material. Instead of using these other adhesives or glue for stone, using Adiseal will avoid this problem.
To use Adiseal to bond stone, brick or masonry to concrete, make sure both surfaces are thoroughly clean especially of any loose bits & dust. Apply product to 1 surface and firmly push the item onto the concrete. Temporary supports may be required if the items starts to slide down.
As stone, brick, tile or other masonry items are usually heavy, to avoid using temporary supports until the adhesive has cured, the Adiseal Hi-Grab adhesive may be more suitable for more grab.
Adiseal will successfully stick marble, granite, travertine, slate, ceramic as well as many other types of stones.
For safety reasons on extra heavy stone, brick, tile or other masonry items, mechanical fixings also need to be used in conjunction with Adiseal when used on to bond items to vertical & overhead applications.
Glue for concrete
It is also possible to glue to concrete using our Adiglue. Although Adiglue is less brittle than super glues, it is still not as flexible or strong as Adiseal construction adhesive & construction sealant.
In the example below we have glued a metal handle to a heavy concrete slab with the Adiglue glue. The concrete required sealing first with Adiglue Activator so that it does not soak up the Adiglue. Sealing is not required when using Adiseal construction adhesive & construction sealant to stick the same metal handle to concrete.
Frequently Asked Questions
Adiseal is the best adhesive to use on concrete as it has proven to be the strongest adhesive by an independent test. Adiseal is flexible, waterproof, high gap fill, high grab, UV resistant & sticks almost any type of material to concrete.
Making sure both surfaces are clean of any dust, grease, paint & any other dirt is vital before applying the adhesive on to the surface of the item being stuck to the concrete.
To remove adhesive from concrete, use a sharp item like a knife or chisel. Usually chemical adhesive removers will not have any affect on concrete adhesive.
As concrete is a porous material, it will soak up any liquid glue or adhesive. With Adiseal this is not required as Adiseal will not soak into the concrete. If the concrete does require sealing, use Adiglue Activator.