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Polyurethane Glue 101 | All You Need to Know + Buyer’s Guide

Woodworking operators are using glue to put together the wood parts to assemble and build a wooden table for their customers

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Glues are an essential ingredient to the recipe for perfect DIY projects.

And so, if you’ve been on the lookout for glue for all your quick fixes and DIY crafts, polyurethane glue is the perfect choice without burning a hole in your pocket. As such, crafters love polyurethane glue for its unique formula.

Crafters love polyurethane glues for their versatility and durability. From fixing your wooden cabinets of the living room to mending the fences of your backyard, polyurethane glues work exceptionally well in bonding anything and everything.

Due to the increasing popularity of polyurethane glues, we decided to give it a shot. And so, having used it for a few months, we decided to pen down this guide just for you. Plus, to make things easy-breezy, we’ve also added a buyer’s guide to help you even further. 

Without any further ado, let’s dive straight into the deets!

Polyurethane Glue 

Joinery work. Apply the adhesive on a wooden surface

Polyurethane is composed of polymer compounds that are close kin of epoxies. Also known as PU Adhesive, Polyurethane glues are an excellent alternative for PVA glues. 

Having said that, polyurethane glues form exceptionally strong bonds when exposed to moisture. They feature a water-resistant formula, which makes them highly resistant to all elements. As such, they are ideal for outdoor applications. 

What we absolutely love about polyurethane glues is their versatility. Unlike wood glues, you can apply this to almost anything you want. From wood, metal to ceramics and foam, you can use polyurethane to create the toughest bonds. For the last 20 years, because of its compatibility with a variety of materials, polyurethane glue has become the go-to glue for contractors. 

Not only are these glues shrink-free, but are also sandable and paintable. This glue is perfect for filling challenging cracks and gaps as its formula perfectly wicks in the surfaces to create the toughest bonds that will last for years to come. 

As such, these glues are pretty user-friendly. Much like cyanoacrylates, polyurethane glue is cured by moisture. You just need to dampen the surface slightly before applying the glue to ensure efficient bonding. 

Moreover, polyurethane glues are available in two varieties, one-part and two-part. The one-part polyurethane adhesive is ready to use as everything is mixed together. Meanwhile, the two-part adhesive requires mixing the formula in precise quantities. 

Having said that, the one-part polyurethane is perfect for beginners, DIYers, and crafters, while the two-part one is ideal if you’re a constructor or a professional. 

Also, if you notice a light-colored foam appearing at the glue line; don’t fret, as you can easily scrape it away after the glue dries. All in all, these glues are perfect for all the DIYers, crafters, enthusiasts, and even novices. 

41uJ4ZeWehL. SL500

Features Of Polyurethane Glue

By now, you have a brief idea of what polyurethane glues are. So now, let us hop on to features that make polyurethane glues worth considering. 

  1. High Versatility

Polyurethane glues are crafter’s and professional’s favorite because of their high versatility. As such, their unique formula is formulated to get along with a variety of materials. Whether you’ve accidentally dropped a porcelain bowl or somebody broke a wooden stool, polyurethane glue will perfectly mend whatever you throw at it. 

Not only is it compatible with ceramics and wood, but also versatile enough to fix metals, rubber, wood, and even plastics. Besides, what we particularly love about polyurethane glues is their custom formulations. As such, you can customize them to meet different requirements. 

  1. Extremely Flexible

When it comes to glues, their flexible nature is of utmost importance. Polyurethane glues are perfect for application on those surfaces or areas which demand flexibility because once cured, they become highly flexible. Therefore, they can withstand thumps and vibrations efficiently. 

And so, if you’re looking for glues to bond two dissimilar materials, polyurethane glues are an excellent choice because of their high flexibility. 

  1. Incredibly Strong Adhesion

Whether you have to assemble your DIY project or mend minor cracks and gaps in the furniture, a strong adhesive is the need of the hour. And, an appealing aspect of this glue is its adhesive strength. Unlike other glues, polyurethane glues form a tough bond even before the drying and curing of the glue. 

Not only that, but it also doesn’t require clamping, thanks to its initial bond. As such, manufacturing processes are made easy-breezy. As such, these robust and durable bonds make polyurethane glues perfectly for challenging applications. Furthermore, it also acts as a sealant to seal porous surfaces excellently. 

51ymIiXOR0L. SL500

  1. Resistant To Elements

If you have to fix the metal gates or the benches of the backyard, you need glues with excellent resistance. That being said, polyurethane glues are not only great for indoor purposes but also excellent for outdoor uses because of their excellent resistant power. 

You can use this to mend whatever surface you want. And because they feature a waterproof formula, you can repair all the outdoor surfaces without worrying about the elements damaging the bonds. 

Therefore, polyurethane glues are excellent for outdoor applications because of their ability to withstand heavy rains and high temperatures. 

  1. Endless Design Freedom

Looking for a strong adhesive to bond complex materials? Go for polyurethane glues, as they bond anything and everything effortlessly. Whether you have to bond complex objects or join dissimilar materials, polyurethane glues will perfectly bond whatever you throw at them.

That’s not all, even manufacturers use these glues for their lightweight applications. Plus, the bonds are seamless and smooth, which is what we absolutely love about glues. As such, they preserve the aesthetic appeal of your objects and surfaces, which is impressive. All in all, they are an excellent option for all your DIY craftworks and projects. 

Pros
  • Highly durable bonds
  • Quick setting time
  • Resistant to water
  • Compatible with a variety of surfaces
  • Sandable and paintable
Cons
  • Toxic formula
  • Doesn’t cure properly in the absence of moisture

Uses Of Polyurethane Glue

For novices, crafters, and enthusiasts, polyurethane glue is an excellent choice for all DIY crafts and projects because of the incredible adhesive strength it offers. Because it doesn’t require clamping, it is used in construction projects, thanks to its strength. 

That’s not all, these glues adhere excellently to even porous surfaces, thanks to their waterproof formula. As such, these glues are an excellent choice for all your crafts and projects because of their versatility and flexibility. 

From wood, metal, fiberglass to masonry, ceramics, carpets, polyurethane glue will bond anything you want. Also, no matter what task you have at hand, the diverse variety of polyurethane glues are there to help you out. 

That’s not all, they are available in both thick and thin viscosities. As such, the thick ones are perfect for all the large projects as they won’t mess up your surface or projects by running all over them. Moreover, it will also allow the novices to work at their own pace. 

Meanwhile, the thin viscosity glue will be perfect for bonding minor challenges and cracks that call for immediate repairs. That being said, it is ideal for enthusiasts and professionals who can work at a quick pace. 

41Wm3OzDP3L. SL500

Examples Of Application

The  excellent adhesion of polyurethane glue makes it perfect for automobiles, as well. Because it is used in the automotive industry to bond a variety of materials, you can use it to quick-fix any damage in your car. 

Looking for ways to fix the broken windshield? Polyurethane glue has got you covered with its excellent bonding strength. 

Another appealing aspect of this glue is that it can be used to create MDF boards. Too good to be true, isn’t it? Mix wood dust and saw chips with polyurethane adhesive and create an MDF board for your next DIY project. 

What’s more, you can use this in place of wood glue because it forms a strong bond and can withstand elements. Plus, you can use this glue to fix broken dishware in your home without worrying about a thing as they are rated food safe. 

Best Polyurethane Glues

  1. Gorilla Original ‎Polyurethane Glue

When it comes to polyurethane glues, Gorilla Original Polyurethane Glue is an excellent choice because it is incredibly strong and versatile. Moreover, the waterproof formula makes it ideal for both interior and exterior surfaces. Plus, it is highly versatile and can withstand extreme temperatures. 

Sale
Gorilla Original Gorilla Glue, Waterproof Polyurethane Glue,...
  • ORIGINAL GORILLA GLUE: The water activated polyurethane...
  • 100% WATERPROOF: Doesn't break down when exposed to outdoor...

Standout Features:

  • Waterproof formula
  • Expands 3 times to bond to materials
  • Usable on both interior and exterior surfaces

Why Did We Like It?

Among all the polyurethane glue available on the market, the Gorilla Original Polyurethane Glue sits atop our list because of its excellent adhesive strength. Its waterproof formula makes it perfect for all minor cracks and fractures. 

The versatility of this glue is almost endless. From ceramics, wood to glass and concrete, this glue excellently bonds anything and everything. What we loved about this glue is its easy application. Plus, it is sandable, and so you can sand off any extra glue peeking out from the cracks. 

As such, it will withstand anything nature throws at it. Moreover, this 8-ounce glue is long-lasting and will surely last you for years to come. Plus, you need not worry in case of accidental spillings, as this glue is easy to clean. With a dry cloth or paint thinner, you can easily wipe off the wet glue. 

Putting it bluntly, the Gorilla Original Polyurethane Glue is a dependable option for all your bonding needs. 

31UQovTROTL. SL500

What Could’ve Been Better?

All in all, we loved the Gorilla Original Polyurethane Glue for bonding surfaces because of its incredible strength and versatility. Having said that, this glue takes slightly longer to dry. 

Although it might be a drawback for those looking for a quick fix, it is an excellent option for those working on large-scale projects. Other than that, this performs exceptionally well. 

Pros
  • Incredibly tough
  • Able to withstand elements
  • Easy application
  • Cleaning is a breeze
Cons
  • Takes slightly longer to dry
  1. Loctite Premium Polyurethane Construction Adhesive

If you’ve been on the lookout for fast curing polyurethane glue, then Loctite 1390595 Premium Polyurethane Construction Adhesive is a perfect choice for you to consider. Moreover, it is environmentally-safe and usable on a variety of surfaces. Plus, it is waterproof and even cures in cold temperatures. 

Loctite 1390595 ADHESIVES_and_SEALANTS, Single, Tan
  • Perfect for installing wood, urethane, or PVC products
  • Non-toxic, non-flammable

Standout Features:

  • High-performance adhesive
  • Curable even in cold temperatures
  • Contains no chlorinated solvents or water

Why Did We Like It?

There are a lot of things we loved about this glue; however, the thing that hooked us right was the fact that it is curable in even cold temperatures. That being said, you can use this for sub-floor installation without worrying about a thing. 

Another appealing aspect of this product is its excellent adhesive strength which makes it compatible with even construction materials. Not only that, but it is highly versatile, as it can be used on multiple surfaces and objects. From cement-based products, ceramics, drywall to concrete, treated wood, and metal, this glue bonds almost everything excellently. 

That’s not all, this polyurethane adhesive can withstand heavy rains, thanks to its waterproof formula. As such, you can use this to fix the cracks of the fences and gates without any worries. Plus, you can also paint this if you wish to. 

What’s more, the formula of this glue does not contain any chlorinated solvents or water and is VOC compliant, which is pretty impressive. All in all, it is an excellent option for all your bonding needs. 

51tdjUk9nKS. SL500

What Could’ve Been Better?

The Loctite 1390595 Premium Polyurethane Construction Adhesive is an outstanding option, mainly because of its versatile application. However, unlike the previous product, it is messy to apply. 

We strongly recommend you use a caulk gun to avoid the mess. Apart from that, it is a good choice for all your bonding needs. 

Pros
  • Compatible with almost everything
  • Can withstand water
  • Sandable and paintable
  • Offers 3x stronger adhesion
Cons
  • Messy to apply
  1. Titebond ‎Polyurethane Glue

Here is another polyurethane glue that you can use on any surface you want. This multi-purpose glue is perfect for all your minor repairs and DIY projects. Its long working time, along with short clamping time, is matchless. Plus, it features a waterproof formula which makes it ideal for outdoor applications. 

Standout Features:

  • Epoxy-like strength
  • No-run no-drip formula
  • 100% waterproof

Why Did We Like It?

If you’re a novice looking for a glue that provides ample working time, then this Titebond Polyurethane Glue is your best bet any day. With its long working hours of 20 minutes, you can work at your own pace without worrying. Plus, its clamp time of 45 minutes is a bonus. 

Moreover, because this polyurethane formula is waterproof, you can use this to mend exterior surfaces without worrying about nature marring the bond. Not only that, but this glue is compatible with several other surfaces and materials, thanks to its versatile nature. 

Whether you have to mend broken stools or fix a porcelain bowl, this glue is an excellent choice for all your needs. Also, its epoxy-like strength seals porous surfaces without difficulty. 

What’s particularly impressive is the spout of this glue which makes application smooth and hassle-free. Plus, you can always sand off the excess glue peeking out from the surface. Lastly, such handy features are coupled with an affordable price tag, making it a go-to option for all professionals, DIYers, and crafters.

31Lb0QeyyJL. SL500

What Could’ve Been Better?

Although this product does stand out in terms of affordability and versatility, we suggest wearing a pair of gloves while working with this glue. This is because many users have complained about the glue bonding to the skin. Apart from this minor issue, it is an excellent choice for all your DIY projects. 

Pros
  • Provides long working time
  • Compatible with various surfaces
  • Easy application
  • Easy on pockets
Cons
  • Bonds skin

Male carpenter hands using wood glue and timber on a wooden table for handmade furniture. Close up. Hobby for man. Wooden table.

Polyurethane Glue Buying Guide

Moving on, we’ve curated a buyer’s guide to help you pick the right polyurethane glues for all your tasks. While having a brief idea about polyurethane glue helps to a great degree, choosing the best polyurethane glue is still a daunting task. 

Not only is the nature of your task important, but you must also consider certain factors before making a decision. Don’t worry, we’ve gone into the ins and outs and compiled a list of factors that you must keep in mind while buying polyurethane glue. 

  1. Adhesive Strength

To choose the perfect polyurethane glue for your projects, you need to consider its adhesive strength. And so, the nature of your task is of utmost importance to determine the kind of glue you need. For all your heavy-duty tasks, glues offering incredibly strong adhesion would be an excellent choice. 

Thus, we strongly recommend you choose only those polyurethane glues that offer excellent adhesion to prevent chipping or flaking. As such, they’ll also create strong and durable bonds that will last for years. 

  1. Viscosity 

While choosing polyurethane glues, you must also consider their viscosity or consistency along with the adhesive strength. For filling minor gaps and challenging cracks, a thin water-like viscosity glue will be excellent. 

Meanwhile, if you have to bond large pieces together, a thick viscosity glue would be ideal. The thin viscosity glues are runny, so they aren’t suitable for vertical surfaces, while the thick viscosity glues are perfect for all kinds of surfaces because of their no-run no-drip formula. 

The bonding process does not give you any second chances, so we strongly recommend you go for thick viscosity glues. 

51oRU5SOqfL. SL500

  1. Curing Time

Not all polyurethane glues are formulated with a short curing time. And so, you must keep the curing time in mind while buying polyurethane glue. The glues with a long curing time will not be a perfect choice for woodworking professionals or constructors. So, a quick curing glue is what they must opt for. 

Although this might not be a major factor if you’re a novice who loves experimenting, this certainly is important for professional woodworkers and constructors. 

  1. Ease of Use

Before you pick polyurethane glue for any DIY crafts and projects, you must consider its user-friendly aspect. Of course, this factor might not be a priority for professionals but is certainly crucial for beginners. 

That being said, we strongly recommend you go for the glues, which are relatively easy to use. As such, they will give you the freedom to work at your own pace. 

  1. Shelf Life

Not to forget, shelf life is extremely important. As such, before buying polyurethane glue, you must consider the shelf life of the product. Irrespective of your needs, the glues with a longer shelf life are a better bet any day. 

Plus, we strongly recommend you go for those featuring air-tight lids to prevent the air from sneaking into the bottle. This will ensure your product lasts long.

Polyurethane Glue

Summing It Up

It’s finally time to wrap our guide.

To sum it up, polyurethane glues come with a number of perks. From bonding metals to assembling DIY projects, polyurethane glues are essential for all your bonding needs. Not only that, but they are excellent for all your DIY projects and challenging repairs. 

That being said, they are one of the best options available on the market. And so, you must make sure to invest in a good quality polyurethane glue as it will allow you to carry out all bonding and repairing tasks in a breeze. 

With that, we shall take your leave. Hopefully, you’ll be able to pick the best polyurethane glue for your tasks. If not, you can always consider the buyer’s guide for making an informed decision. 

That’s all for today, folks. Adios!

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