The best adhesive for granite countertops is an epoxy adhesive. It provides a strong bond that will permanently keep the granite attached and is highly water resistant.
For a more detailed and in-depth answer, keep reading this guide.
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What should I look for in an adhesive?
When looking for an adhesive for granite adhesive or any other adhesive for that matter there are certain traits that should be taken into consideration before purchasing the glue needed for the job.
Some glues work on specific materials better than others, while other glues can be considered all-purpose, it may be that a more specialized adhesive would be the better choice.. Depending on the job and in the case of granite countertop installation a more specific glue would be a better idea.
Strength
When looking for an adhesive for a granite top installation it is important that the glue be as strong as the stone. When attaching the countertop to the cabinet base the strength of the glue is important. When attaching two slabs together strength is critical. The bond between the surfaces needs to be as strong as or stronger than the pieces being attached together.
Strength measurements and testing procedures are done by professionals who can make it easier for deciding on the appropriate strength of glue needed.
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Cure time
Cure time is an important aspect to take into consideration when setting the countertops. The glue needs to be set in order for the bond to be as strong as possible. Generally speaking, 24 hours is the time needed for the bond to be considered set and the glue considered cured.
In stone-to-stone applications following the suggested cure time is recommended and highly advisable. Having a flat surface to work on with time to allow it to cure will lead to the best results.
Best glue for granite countertops
When choosing the best glue for installing or repairing granite countertops it is good to be aware of these four types of glue.
- Mastic glue
- Silicone glue
- General adhesive glue
- Epoxy glue
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Mastic Glue
Mastic glue is a thick type of glue used in one type of application as a tile setting glue. Mastic is an organic material made from the Mastic tree. Often this type of glue will come in larger tubs, but is also available in liquid and thin set forms.
Silicone Glue
Silicone glue is a stronger version of silicone sealant. Silicone sealant/ caulking can be used as an adhesive but will lack the strength of a silicone adhesive. The sealant is a gel-like substance made to seal cracks, and has some construction uses. A flexible and easy to use glue with a range of types and uses. Silicone glue is a two component adhesive.
General Adhesive Glue
General adhesive glue is as it sounds a glue meant for general purpose and having no properties specific to a specific job or function. Ie;specific category glues, specific material adhesives. General adhesive glues can come in dispensers and in spray form.
Epoxy Glue
Epoxy glue is a resin type glue. Generally having a two-part component, One being the resin, the second the hardener. Once the hardener and the resin are combined the curing process begins.
Of these four, epoxies are the most common type of glue used for granite.
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Best epoxy for granite countertops
It is widely agreed upon that Epoxy adhesive is the best type of glue for granite countertops. Epoxy is considered to be a very stable product in that its ability to withstand stress over a period of time without losing strength.
The curing time and hardness can be regulated by the mixture ratio of the hardener making the epoxy adhesive a user friendly adhesive with specific application variations. It can even cure while underwater.
Gorilla epoxy
Gorilla epoxy glue is a multi-surface adhesive with work time around 6 minutes. Gorilla epoxy comes in a syringe delivery system with the resin and the hardener in separate barrels.
Gorilla epoxy dries clear making it a good choice for a finishing glue. It also can be used in gap-filling applications and is also solvent resistant. An all purpose repair glue with a durable bond.
Best silicone adhesive for granite countertops
When choosing to use silicone glue, the strength of the bond needs to be taken into consideration. Silicone adhesives are put into grades and if a strong adhesion is needed a 100% silicone adhesive will be a good choice.
The best silicone adhesive or sealant for granite is an ASTM C920 silicone sealant. This adhesive caulk works well between the backsplash and the countertop. Available in colors to match the granite, waterproof and can be tooled for a detailed finish.
The price for a silicone adhesive with strong bonding strength will have to be taken into consideration when deciding to use it.
Permatex
Permatex is a single-component all-purpose adhesive.
Benefits include:
- Waterproof
- Flexible
- Non-toxic
- Easy to apply
- Non- flammable
Permatex Black Silicone Adhesive Sealant can be used indoors and outdoors and under normal conditions will be set up within an hour. The all-purpose adhesive can be used in many applications with a wide range of surfaces.
Best adhesive for granite to granite
In granite to granite applications a silicone adhesive will probably not be the best choice. The best option for granite to granite applications is an epoxy. Silicone may be an option if working with granite tile but for slab granite, the strength is a factor and epoxy resin adhesives have the strength and the hardness to match the stone.
FAQ
Is Gorilla glue good for granite?
Yes. Gorilla glue can be used on granite surfaces and also can fill gaps up to 1/16 in.
Can granite be glued together?
Yes, granite can be glued together. Whether for repair or construction an epoxy adhesive can work for glueing granite together.
Can you glue broken granite back together?
Yes. Broken granite repairs can be done with an epoxy resin or in some cases a silicone adhesive can be used.
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