Rubber is one of the most used materials on the planet. As a versatile material with incredible flexibility, rubber is used in everything, from automobile tires to shoe manufacturing. While you work, you might sometimes need to glue rubber to rubber or other materials for your projects.
However, gluing rubber is a challenging job. You may not find a random glue purchased from an art or hardware store is working well. Besides, you may have already encountered situations where the glue failed to bond rubber or fell off later after a few hours.
Therefore, it’s essential to know which glue to use and how. This article will provide everything you need to know about gluing rubber together.
How to Glue Rubber to Rubber
Super glue is suitable for attaching any rubber. The main benefit is that it is inexpensive and readily available in any hardware shop. It’s possible that you already have it stashed away in your drawer. Besides superglue, epoxy adhesive, contact cement, and wood glue bond rubber perfectly. The following steps will be efficient while you glue rubber together:
- First, clean the rubber’s surface. Dust, lubricant, or grease might be present outside the object, and those additives prevent the rubber from sticking well. Use soap and water to wash the additives away. You can also use IPA alcohol or isopropanol to clean the surface. Some people recommend acetone to wash the additives off, but it is not suitable for all rubber surfaces.
- Place a small drop of adhesive between two rubber surfaces. Then squeeze both parts tightly together, focusing on the area of adhesive. Do this step slowly to avoid any repositioning later.
- Clamp the rubber together according to the setting time of the glue.
- After the glue ultimately sets, check that the rubber has adhered perfectly. If that’s the case, repeat the process for adhesion on other parts.
Silicone rubber: Gluing silicone rubber together is a tough job. Silicone rubber is not compatible with all glues. Even if the rubber sticks together for a while, it will eventually fall apart.
Use an adhesive primer first for silicon rubber. Then apply a silicon-based adhesive layer. Clamp the rubbers together until the glue is completely dry.
- Do not choose a runny glue. It runs over the surface and spreads where you do not intend to glue.
- Rubbers containing plasticizers or elevated oil content may not work perfectly with hot glue or super glue.
How to Glue Rubber and Metal
Some projects demand gluing rubber to metal for multiple interior and outdoor applications. It is tricky to find glue that works well with both materials. For example, you can use epoxy adhesive, super glue, or contact adhesives. Their properties are compatible with rubber and metal.
Superglue or contact adhesive dries rapidly and holds the items firmly in place. On the other hand, epoxy adhesives create the strongest bond and take longer to dry. The type of adhesive you choose depends on your working style.
After choosing the adhesive, it is time for us to move on to the gluing part. I’ve included some instructions that worked.
- Scrape the surface of the metal with sandpaper. It will leave a textured surface.
- Wipe down both metal and rubber surfaces with a soft, wet cloth. And wait till the humidity is gone.
- Put a thin layer of glue on the rubber and then on the metal. Always use an adhesive suitable for gluing rubber to metal. Look at the adhesive setting time in the instruction on the container. Allow it to set according to the setting time.
- Compress both items firmly where you put the glue layer earlier. Take your time and do it slowly. Then, use a clamp or any means to put them together before the adhesive completely dries.
- You should not pick up wet adhesives. They do not work on metal.
- Epoxy and contact adhesive might create vapor. Inhaling vapor may cause dizziness and nausea. Work in a well-ventilated area.
How to Glue Rubber to Wood
Rubber and wood adhesion can be challenging at times because all types of adhesives do not work on both materials simultaneously.
However, polyurethane glue, super glue, and contact cement are suitable for gluing rubber to wood. Follow these procedures:
- The most crucial aspect of gluing is surface preparation as well. If contaminants like dust or grease remain on the surface, the bond will be weak. To remove pollutants from rubber, use isopropanol and scrub the surface with a brush.
- Wood is a porous surface, so use a sealer to prevent the glue from soaking in. After that, smooth it out.
- Apply glue on both surfaces. Use a brush to put the glue on the rubber and then on the wood.
- After that, hold the pieces together firmly and clamp them in place to dry the glue. Some glues take minutes to set fully, while others take hours. If you want the bond to set and cure faster, you can use activators.
- Silicon rubber is difficult to bond. Even if the adhesion remains, it may peel off later. For silicon rubber, use silicon-based adhesives or epoxy glue.
How to Glue Rubber to Concrete
You need to adhere the rubber to concrete for various household and industrial applications. When it comes to surface type, rubber and concrete are the opposites. Furthermore, concrete absorbs moisture from the air, and rubber is difficult to glue. Therefore, picking the correct glue is essential.
Since rubber bends and stretches, epoxy adhesives are an excellent choice because they are flexible. On the other hand, polyurethane and silicone adhesives form a strong bond that lasts for several years. You can choose any of these.
Now it’s time to glue everything together. There are several steps to gluing rubber to concrete. Let’s get started.
- First, use a brush to remove debris and dust from the concrete’s surface. If you want to remove oil and grease from rubber and concrete, you can use isopropyl.
- After that, use sandpaper to add texture to the rubber surface.
- Put a thick layer of glue on the concrete. Spread the glue on the concrete with a spackle trowel or spatula.
- Now, place the rubber on the concrete. Press it firmly and evenly to eliminate any air bubbles. Use a small heavy object or a clamp to keep them in place.
- Allow the adhesives to cure. Since polyurethane is moisture sensitive, it begins to fix almost immediately. It is best to leave the objects for 24 hours to ensure proper adhesion and cure.
- Epoxy adhesives and silicon-based adhesives create vapor. These will make you dizzy and nauseous if you inhale them. So, work in a well-ventilated area.
How to Remove Adhesive from Rubber
Rubber is suitable for various applications; it is utilized for everything from insulation to footwear. We often put adhesive on the rubber for these things. However, there are occasions when we need to remove glue from rubber, either because we want to reuse it or because some glue has fallen on it by accident.
Removing glue can be a pain if you don’t know what you’re doing. Note that, you need to be patient and follow a few steps. You can remove it by scraping, or you may need to use chemicals in some cases. Please proceed by following the procedures outlined below.
- Scrape off the glue from the surface as much as possible. You can use a paint scraper or a small putty knife to scrape it off. Do it slowly with some time. The more you remove in this step, the easier the next step will be.
- Scrape to remove glue from rubber using non-chemical solutions. Non-chemical solutions are better for nature and are safe to use. If you have vinegar, soak the rubber surface in vinegar for 15 to 20 minutes. After soaking, use a stiff brush to scrub the spot. You may be able to remove most of the glue; if not, go to step three.
- Now it is time to go chemical. Take a soft cloth and soak it with acetone or turpentine. Then rub the fabric on the rubber surface. If acetone starts to dry, pour some more in. Then, after 15 to 20 minutes, use a brush to scrape the residue. Repeat the process until you have cleared all of it.
- Be aware when using a knife or scraper because they might puncture or damage the rubber surface.
- Before you use any chemicals, make sure your work area is well-ventilated and that you wear gloves. Never inhale the fumes.
It’s not easy to glue rubber to other materials. However, you can bond to almost any surface with rubber with patience and suitable glue. We hope this article has answered all of your questions about gluing rubber together.