User Guide

Product:
3M™ SR Radial Bristle Discs, 2" and 3" diameter, are plastic particle filled bristle products. The SR
Radial Bristle Disc has a curved radial design for greater conformability.
Applications:
3M SR Radial Bristle Discs are designed to remove thin layers (1/16” or less) of sealants and soft
cross-linked adhesives with minimal or no damage to underlying coatings and surfaces, especially in
aerospace applications. Examples of sealants are polysulfide, polythioether, polyurethane, silicones,
and RTV’s.
Ad
vantages:
Increases Productivity
• Sealant removal without the need to repaint/reprime damaged coatings
• Remove sealants and residues quickly; no waiting for chemicals to act or handling of liquid
hazardous waste
• No resharpening of blunted plastic scrapers
• Protects sensitive metal surfaces; no more gouging or scratching with metal scrapers.
• Unique bristle pattern provides conformability and accesses hard-to-reach areas that are difficult
to scrape
• Non-loading
• Cool running
Easy To Use
• Mount a 3M™ 990 or 991 Mandrel in a straight shaft or right angle pneumatic tool, preferably
rated at 12,000 RPM or less.
• Use plastic 1" 3M™ Roloc™+ Mandrels and No. 7 buttons where metal mandrel and work
surface contact is unavoidable and unacceptable.
• Install multiple discs with hubs interlocking and embossed arrows in direction of tool rotation
onto mandrel.
• Apply light pressure to discs while operating tool. Start at one end of sealant and work to the
end.
• Use a light brush and vacuum to remove debris. Any visible residues may be removed with a
solvent, such as isopropyl alcohol, and wipe.
Product Availability:
Disc Converted Forms: 2" and 3" radial bristle discs with 3/8" center hole.