Why Your Sanding Discs Aren’t Sticking

Are you having trouble getting your sanding discs to stick correctly? Do they just not stick at all, or do they fall off the sander while in use? This is a typical problem that is irritating, but fortunately, there are remedies available to help you get back on track. In this blog post, the Benchmark Abrasives team will discuss the most frequent causes of non-sticking sanding discs and offer workable fixes to help you finish your projects.

COMMON CAUSES FOR NON-STICKING SANDING DISCS

Multiple causes can cause sanding discs to come loose. Sometimes, the problem is with the workpiece's surface or the backing pad; other times, it's because you're using the incorrect kind of disc or keeping your sanding materials in a moist place. An outline of potential causes is provided below.

1. Surface Contamination 

Surface contamination is one of the most frequent causes of sanding disc failure. The adhesive on the back of the disc and the backing pad or sanding tool may become incompatible due to residues such as dust, dirt, oil, and other substances. Even the tiniest amount of contamination can cause the disc to not stick correctly, which can cause frustration and material waste.

Solution: Carefully clean the backing pad before using a fresh sanding disc. Use a fresh, dry cloth or a mild solvent like rubbing alcohol to get rid of debris, dust, or oils. Make sure the pad is totally dry before using the disc. Cleaning your workspace and instruments on a regular basis can also help prevent this problem from developing.

2. Outdated Backing Pads 

Your sander's backing pad may become worn out with time. The sanding disc creates a smooth, glossy, or even fractured surface that makes it harder for the adhesive to stick to. In addition to compromising adhesion, a worn-out pad can cause uneven sanding and harm to your workpiece.

Solution: Frequently check your backing pad for wear indicators. It's time to replace it if you see that the surface is smooth or broken. 

3. Using The Incorrect Sort Of Sanding Disc

Because not all sanding discs are made equal, choosing the incorrect kind for your particular sander can result in problems with adherence. For instance, although some discs employ hook-and-loop (Velcro) systems, others are made with pressure-sensitive adhesive (PSA). A PSA disc will not adhere to a hook-and-loop pad if you attempt to use it.

Solution: Ensure that the sanding disc you're using on your orbital sander is the appropriate kind. Make sure the disc type fits the manufacturer's specifications for your tool. If you're unsure, obtain advice from an informed source such as Red Label Abrasives to make sure you're purchasing the appropriate product for your requirements.

4. Effects Of Temperature And Humidity 

Sanding disc adhesive qualities can be affected by environmental conditions such as humidity and temperature. Low temperatures might make the glue too stiff to attach correctly, while high humidity can make it tacky and lose its grip. Your sanding discs might not stick as well if you're operating in an area with high or low levels of moisture or temperature.

Solution: To preserve the adhesive quality of your sanding discs, store them in a cold, dry location. If you work in a humid area, use a dehumidifier in your workspace to manage the moisture. Likewise, to enhance adhesion when working in cold weather, attempt to warm up the discs a little before using them.

5. Inappropriate Method Of Application

Occasionally, the way the disc is used presents the issue rather than the disc or the surroundings. It could not stick as well as it should if you're not aligning it correctly or if you're not using enough pressure when adding the disc. Poor adhesion might also result from applying the disc too quickly without taking the time to make appropriate contact.

Solution: When using sanding discs, go slowly. Before pressing the disc down, make sure the backing pad is clean and that it is properly aligned. To ensure a strong binding, apply hard, even pressure all the way across the surface. In the long run, the right application can save you time and frustration, so don't rush this stage.

6. Low-Quality Or Outdated Adhesive 

Adhesives have a shelf life like any other material. If your sanding discs have been in your workshop for an extended period, they may not stick as well because the adhesive may have deteriorated. Similarly, even when everything else is done perfectly, utilizing inferior adhesive and sanding discs might lead to problems.

Solution: Inspect your sanding discs' quality and age. It may be time to replace them with fresh ones if they are old or have been stored incorrectly. Purchasing premium discs with dependable adhesive can significantly impact how well you sand.

7. Unsuitable Discs And Backing Pads

Adhesion issues may arise when the sanding discs and the backing pad are not compatible. For instance, correct adhesion will be impeded if a PSA disc is used with a hook-and-loop pad or vice versa. Despite the disc's first appearance of sticking, it could break away while being used, causing delays and possibly damaging your workpiece.

Solution: Always ensure that your sanding discs and backing pad are suitable. If you're using a hook-and-loop pad, use hook-and-loop discs. If you prefer PSA discs, use a flat, smooth backing pad made specifically for PSA goods. Prior to beginning your project, make sure everything is compatible. This will help you avoid problems and wasted time.

8. Sanding Discs Stored Improperly 

How you store your sanding discs can significantly impact their adhesive quality. If they are exposed to dampness, high temperatures, or direct sunlight, the adhesive may eventually deteriorate, making it more difficult for the discs to adhere correctly. Additionally, improper storage may cause the discs to bend or curl, making adherence even more difficult.

Solution: Keep your sanding discs out of direct sunlight and in a cool, dry environment. To keep them safe from moisture and dust, store them in their original packing or in a sealed container. You may make sure that your discs are in excellent shape when you're ready to use them by keeping appropriate storage conditions.

9. Overheating While Sanding 

Heat is produced while sanding, particularly when employing aggressive grits or working with tougher materials. Overheating during the sanding process may cause the adhesive on the disc's back to weaken and lose its grip on the backing pad. This may cause the disc to slip or fly off while in use, endangering your safety and damaging your work.

Solution: Sand at slower speeds and with a gentler touch to minimize heat accumulation. Try to take rests between sanding sessions to give the backing pad and disc time to cool down. Additionally, begin sanding with a coarser grit and work your way up to a finer grain. This method minimizes heat generation and lessens the requirement for high pressure.

10. Not Enough Surface Area 

The place where the disc and backing pad come into touch can occasionally be the source of the issue. Poor adhesion may occur if the backing pad is too tiny for the disc or if its shape isn't exactly matched with the disc. Insufficient contact may result in the disc lifting or peeling away while being used, which could cause damage and uneven sanding.

Solution: Verify that the sanding discs and backing pad are the appropriate size and shape for one another. To establish a solid binding, the disc's whole surface needs to come into touch with the backing pad. If required, replace your backing pad with one that better fits the dimensions and form of your discs. 

11. Buildup Of Residue On The Backing Pad

Over time, the backing pad may gather residue from various materials, adhesives, and dust. This accumulation may act as a barrier, preventing the pad and new sanding disc from adhering correctly. In addition to affecting the connection, residue buildup can result in uneven sanding and early disc wear.

Solution: To remove any residue, clean your backing pad frequently. Use a small amount of rubbing alcohol or a specific adhesive remover to clean the pad. Make sure the pad has dried fully before reattaching the disc. Regular tool maintenance can increase the life of your backing pad and sanding discs.

12. Inappropriate Sanding Method 

Using the wrong sanding techniques can cause your sanding discs to lose their adhesion during use, even if they are sticking well at first. Disc slippage or peeling can be caused by sanding at the incorrect angle, applying too much pressure, or using too much speed.

Solution: Use appropriate sanding processes to guarantee consistent outcomes. Instead of driving the disc into the material, apply a moderate amount of pressure and let the sander do its job. Keep your speed and angle constant to prevent excessive heat or pressure that could weaken the adhesive bond. Proper technique enhances adhesion and also produces superior overall sanding outcomes.

TROUBLESHOOTING GUIDE FOR EXTENDED ADHESION ISSUES

There are a few more actions you may take to identify and resolve the issue if you've attempted the aforementioned fixes but the sanding discs are still not sticking:

• Test Various Discs: Adhesion issues can occasionally be fixed by transferring to a new brand or variety of sanding discs. Try out a few different combinations to see which works best for your sander and job. 
• Examine Pad Wear: If you have an outdated backing pad, it might be time for a replacement. A new pad can significantly alter the disc adhesion.
• Examine Environmental Factors: If you're operating in extremely high or low temperatures, consider the potential effects these conditions may have on the glue on your sanding discs. You may need to modify the setup of your work area or use sanding discs made especially for difficult situations. 
• Examine Your Equipment: Make sure your backing pad and sander are regularly checked for wear and damage. The backing pad's minor flaws can impact how well your sanding discs adhere. If you find any problems, changing the backing pad or making any required repairs can enhance your sanding experience. 
• Speak With Experts: If you're still having issues despite trying these fixes, it may be time to consult a professional. Experts from manufacturers such as Red Label Abrasives can assist you in troubleshooting your particular scenario and suggest the finest goods and procedures for your needs.

CONCLUSION

It can be annoying to deal with sanding discs that won't stick, but if you have the necessary information and skills, you can fix the issue and continue working on your tasks. Making the necessary adjustments to your workstation, cleaning your backing pad, or choosing the best disc will all help you save time and effort when dealing with adhesion issues.

Benchmark Abrasives has a great assortment of high-quality sanding discs that offer dependable adherence and excellent performance. We welcome you to check them out. Our products are made with the needs of do-it-yourselfers, metalworkers, and woodworkers in mind, so you always receive the greatest results. Our team of professionals can help you with selecting the appropriate disc or debugging any issues you may be having.