Installing a bathroom sink or any sink at all requires a strong adhesive with bonding power that can withstand water, and protect your countertop or wall from swelling or degrading.
High-quality sink adhesives are watertight, resistant to extreme temperatures, and have fungicidal properties. In this article, we’ll be taking you through the best of these products.
Before we jump right into the product roundup, you must know that there are different types of sink adhesives.
Additionally, not all bathroom sinks require adhesive for a successful installation, so let’s take a look at these pieces of information briefly.
What Are the Types of Bathroom Sink Adhesives?
The most commonly used adhesive for bathroom sinks is a silicone caulking seal, but this can’t hold certain materials, below you’ll find a guide to the types of sink adhesives.
- Silicone Caulking Seals
As I mentioned earlier, this type of sealant is pretty common and is made of a specially formulated compound that is water-resistant and has moderate bonding power.
It is produced specifically for sink installations and works best on surfaces like countertop laminates and ceramics.
Silicone caulking seals are also known as shower, tub, or bathroom caulking seals.
- Silicone Granite and Marble Caulk
Installing a bathroom sink on marble or granite requires a bonding material or sealant a lot stronger than the commonly used silicone caulking seal.
There are special silicone products formulated for impenetrable surfaces called silicone granite and marble caulk. You can also use this type of sealant to bond rimmed sinks.
A mounting clip can be used alongside some sealant, to ensure that your sink is well-secured.
- Advanced Silicone Caulk or Siliconized Acrylic Caulk
This type of adhesive is manufactured solely for undermount sinks, it has super strong bonding properties that can support the weight of a whole sink.
Not enough application of this sealant can spell disaster, especially if the support of your sink is poorly installed.
So, when installing an undermount sink make sure you not only apply enough sealant but use the right type of silicone caulk.
- Plumber’s Putty
A plumber’s putty is a type of sealant made of a clay-like material that is watertight, it is usually applied under flanges or the seam of a rimmed sink.
This type of sealant is commonly used in the installation of rimmed sinks and can be substituted for regular silicone sealants.
- Caulk Strip or Caulking Tape
The last type of sealant on our list is a caulk strip or caulking tape, this self-adhesive tape can be used to seal bathroom sinks, bathtubs, toilets, and even gas stoves.
Caulking strips aren’t so popular because they have little bonding power, they work best in low moisture settings and they don’t last very long.
What Are the Best Adhesives for Bathroom Sinks?
If your sink came with a manufacturer-recommended adhesive, you can use that when installing but if this is not the case here’s a list of the best bathroom sink adhesives.
- Gorilla 100% Silicone Sealant Caulk
If you’re looking for a sealant that has exceptional bonding power and is completely silicone-based, look no further than the Gorilla 100% Silicone Sealant Caulk.
This product is super affordable, durable, effective, and water-resistant. It can be used both indoors and outdoors, to repair cracks or breaks.
It works on doors, windows, and kitchen items and is resistant to mildew and molds. It won’t crack, or turn yellow over time.
- Super affordable
- Lasts for a long time
- Has fungicidal properties
- Doesn’t shrink or crack
- Difficult to clean
- It is not paintable
- Has a strong odor
- It takes longer than the drying time specified on the package
2. DAP Kwik Seal Adhesive Caulk
The DAP Kwik Seal Adhesive Caulk is an all-purpose product that does a wonderful job at sealing bathroom sinks.
It has a long plastic cap that makes it super easy to apply from the tube, it can also be inserted into a caulk gun.
This product has antimicrobial properties that fight the growth of stains and odor-causing bacteria and it is crack-proof, paintable, and super easy to clean.
- Can be painted
- Little to no odor
- Not so hard to clean
- Doesn’t crack or shrink
- Long drying time
- Hard to squeeze out
3. Loctite Clear Silicone Waterproof Sealant
Just like many other sealants on the market, the Loctite Clear Silicone Waterproof Sealant has several other uses apart from bonding a bathroom sink.
This product works best on surfaces like glass, wood, ceramic, porcelain, ABS, marble, aluminum, fiberglass, granite, tile, vinyl, plastic, and some rubbers.
It is not paintable and is best used within the temperature range of -35°F(-37°C) and 140°F(60°C), on a dry surface that is free of grease, dust, contaminants, and old caulk.
- It is water-resistant
- Has exceptional bonding power
- Can be used for several purposes
- Resistant to high temperature
- Weak plastic cap and tube
- Sometimes hard to squeeze out
4. Star Brite Marine Silicone Sealant
If you’re looking for a standard sealant that can do a decent job at bonding your bathroom sink then you should probably try out this product.
The Star Brite Marine Silicone Sealant, is quite durable, can withstand water and extreme temperature. It bonds to plastic, wood, glass, fiberglass, ceramic tiles, and metal.
This product can also be used to fill up cracks, and joints. It is easy to apply and isn’t so difficult to clean.
- Easy to clean
- Super affordable
- The tube isn’t so strong
5. GE Supreme 100% Silicone Water-Ready Caulk
This product is a great buy if you’re looking for a product that’s not water-soluble. It is super durable, doesn’t shrink or crack, and comes in different colors to meet your repair or installation needs.
The GE Supreme 100% Silicone Water-Ready Caulk can withstand water after an hour of its application and bonds to glass, laminate, granite, fiberglass, and metals.
You can use this product on not just sinks but tubs, showers, countertops, fixtures, and tiles. It also has fungicidal properties that make it resistant to mildew and molds.
- It is cheap
- Can resist water
- It has several uses
- It is resistant to molds and mildew
- Hard to squeeze out
- Nozzle needs regular clearing
- Dries too fast
- Not so easy to clean
Best Adhesive for Bathroom Sink: FAQs
Do I need a caulk gun to use these products?
If your sealant has a nozzle or a long cap then you might not need to use a caulk gun.
You can just apply the sealant right from the tube, making sure to apply little pressure, so that you don’t damage the tube. For safe and easy application, you can use a caulk gun.
How long before sealant wears off?
It takes a pretty long time for silicone sealant to wear off. It can last for at most 20 years depending on the quality of the product used.
If you don’t apply your sealant right, this can also shorten the amount of time it’d last.
Other factors like temperature, the type of material the sealants are applied on, UV light can make your sealant wear off faster.
How long does silicone sealant last once open?
Silicone sealants usually have a shelf-life guarantee of not more than a year. It can be lesser if you don’t store it right.
Use some tape to seal the nozzle of your sealant and store it in your freezer so that it can last long.
This storage method would keep your sealant from hardening or drying out fast. Don’t worry the sealant wouldn’t affect any of the food items you have stored in the fridge.
There you have it; we hope we’ve been able to provide a super useful buying guide and answer questions you might have about bathroom sink adhesives.
We are also super confident that whatever product you go with from the list provided in this article would be beyond satisfactory.