sia 6120 siafleece 6" Grip Nonwoven Abrasive Discs, Ultra Fine (Gray)

Product Overview sia Abrasives 6120 siafleece 6" Grip Discs – Ultra Fine (Gray) are premium nonwoven finishing discs engineered for ultra‑smooth surface refinement in both manual and machine sanding. The 6120 series offers exceptional conformability, low clogging, and consistent performance throughout its entire service life, making it ideal for ultra‑fine finishing, polishing, and final surface preparation. The open nonwoven structure adapts easily to contours, edges, and complex shapes while maintaining a controlled, even finish. A hook‑and‑loop (grip) backing ensures fast, secure attachment to orbital sanders and finishing tools. Part #: 1245.3717.8712 Grade: Ultra Fine (Gray) Quantity: 25 discs per box Features & Benefits Highly flexible nonwoven construction adapts to contours and edges Ultra‑fine finishing capability for controlled surface refinement Low tendency to clog; suitable for dry or wet sanding Produces smooth, uniform finishing results Grip (hook‑and‑loop) backing for fast disc changes Ideal for manual sanding or portable machine sanding Technical Notes 6120 siafleece uses a mechanically coated nonwoven fiber structure that maintains cutting consistency as the disc wears. The resin‑over‑resin bonding improves durability and reduces fiber shedding during machine use. The Ultra Fine grade is equivalent to a gray nonwoven finishing disc and is ideal for ultra‑smooth surface refinement prior to painting, coating, or polishing. Recommended Applications Ultra‑fine finishing and blending Final surface preparation before painting or coating Light polishing and cleaning Discoloration removal Surface refinement on metals and alloys Suitable Materials Unalloyed and low‑alloy steel Non‑ferrous metals High‑alloy steels Aluminum Stainless steel Comparison Advantage Unlike many nonwoven finishing discs on the market, sia 6120 siafleece discs feature a backing specifically engineered for use with grip (hook‑and‑loop) backup pads. This purpose‑built design provides: More secure attachment to the pad Reduced slippage during use Improved disc stability and control Longer usable life compared to generic nonwoven grip discs More consistent finishing results across the entire surface This gives 6120 siafleece a performance advantage over traditional nonwoven discs adapted from hand pads or sheets. Product Specifications Series: 6120 siafleece Type: Nonwoven finishing disc Grade: Ultra Fine (Gray) Size: 6" disc Backing: Nonwoven with grip (hook‑and‑loop) Coating: Mechanical Bonding: Resin over resin Suitable for: Dry or wet sanding Quantity per Box: 25 discs Part Number: 1245.3717.8712 SMSDistributors Expert Notes The sia 6120 siafleece series stands out in the nonwoven finishing category because it is engineered specifically for machine use. Many competing nonwoven discs—such as Mirka Mirlon, Norton Bear‑Tex, and 3M Scotch‑Brite—are adapted from hand pads or sheet material, which can lead to slippage, premature wear, and inconsistent finishing when used on orbital sanders. In contrast, 6120 siafleece discs feature a purpose‑built grip backing designed for hook‑and‑loop backup pads. This results in: Superior disc stability during machine sanding Reduced slippage compared to generic nonwoven grip discs Longer disc life due to improved backing durability More consistent finishing across the entire surface Better edge control when working on contours or tight areas The Ultra Fine (Gray) grade is ideal for final surface preparation, polishing, and ultra‑smooth finishing. It produces a refined, uniform finish that is noticeably smoother than many competing nonwoven discs. For shops accustomed to Mirlon or Bear‑Tex, 6120 siafleece offers a noticeable upgrade in both performance and longevity—especially when used on orbital sanders with grip backup pads. Video FAQ What is the 6120 siafleece series used for? The 6120 siafleece series is designed for fine and ultra‑fine finishing, blending, polishing, and surface preparation on metals. It produces a uniform, controlled finish and adapts easily to contours and edges. What grade is this disc? This product is the Ultra Fine (Gray) grade, ideal for ultra‑smooth finishing and final surface refinement. What is the part number for this disc? The manufacturer’s part number is 1245.3717.8712. How many discs come in a box? Each box contains 25 discs. What type of backing does this disc use? These discs use a grip (hook‑and‑loop) backing designed specifically for use with orbital sanders and grip backup pads. This provides better stability and longer disc life compared to nonwoven discs adapted from hand pads. Is this disc suitable for wet sanding? Yes. The 6120 siafleece series is suitable for both dry and wet sanding applications. What materials can I use this disc on? These discs work well on unalloyed and low‑alloy steel, stainless steel, aluminum, non‑ferrous metals, and high‑alloy steels. How does this compare to Mirka Mirlon or Norton Bear‑Tex? Unlike many nonwoven discs adapted from hand pads, sia 6120 siafleece discs feature a backing engineered specifically for grip backup pads. This provides more secure attachment, better control, reduced slippage, and more consistent finishing results. What machines are these discs compatible with? These discs are compatible with any 6" orbital sander or finishing tool that accepts hook‑and‑loop discs. About Us SMSDistributors.com is an authorized distributor of sia Abrasives, supplying professional‑grade grinding, sanding, and finishing products for automotive, marine, metal fabrication, woodworking, and industrial applications. We provide accurate technical data, fast shipping, and expert support to help customers choose the right abrasive for every job. Category Category: Nonwoven Finishing Discs, Surface Conditioning Discs, siafleece 6120 Series