Solid H&L vs PSA Resin Discs: Which Backing Suits Your Sander?
By Supergrit Abrasives | Published: 2026-11-01
Category: Comparisons
Compare solid hook-and-loop red resin discs with PSA roll discs on backing, size range, grit options, and changeover speed so you can pick the right setup for your sander.
Quick answer
Choose solid hook-and-loop red resin discs when you change grits often and want a wide size and grit range; choose PSA roll discs when you want a thin, firm adhesive bond for a single grit run on a 5-inch sander.
Backing attachment changes how you work, not just how the disc sticks
Hook-and-loop discs press onto a compatible backup pad and peel off by hand, so grit changes take seconds and the disc can be reused if it still has life. PSA discs rely on pressure-sensitive adhesive: you press them onto a smooth pad face and peel them off when worn, which gives a low-profile bond but usually means the disc is done once removed.
The practical difference shows up in workflow. Frequent grit steps favor hook-and-loop; long single-grit runs favor PSA because there is no loop layer between the abrasive and the pad.
Size and grit range favor the hook-and-loop lineup
The solid H&L red resin discs come in 5-inch, 6-inch, and 8-inch dimensions with grit options from 36 through 220 depending on size, so one backing system can cover coarse stock removal through finer finishing on several sander sizes. The PSA roll discs are listed only in 5-inch 100F grit, which makes them a focused option rather than a full-range system.
If you run more than one sander size or need to step through several grits on the same part, the narrower PSA offering will force you to keep a second system on hand.
Where PSA has the edge, and where it falls short
PSA discs sit flat against the pad with no loop interface, which can suit finishing passes where you want a firm, thin bond and are not swapping grits mid-run. The trade-off is commitment: once the adhesive is set and the disc is worn, removal ends its life, and adhesive residue can build up on the pad if you are not careful.
Hook-and-loop is the more forgiving choice for mixed work, but it depends on a compatible backup pad and the loop layer adds a little thickness compared with PSA.
Trade-offs to weigh before you buy
- Changeover speed vs bond profile: Hook-and-loop peels off by hand for fast grit changes; PSA presses flat with no loop layer but is effectively single-use once removed. Count how many grit changes a typical job needs before deciding.
- Range vs focus: The solid H&L red resin discs cover 5-inch, 6-inch, and 8-inch sizes and grits from 36 to 220 depending on size; the PSA roll discs are listed only as 5-inch 100F. If you need more than one size or a grit progression, the H&L range is the broader fit.
- Pad compatibility: Hook-and-loop discs require a compatible backup pad; PSA discs need a smooth pad face and careful removal to limit adhesive residue. Check your existing pad before committing to either system.
Product facts at a glance
- 5", 6" & 8" SOLID H&L RED RESIN DISCS: Available in 5-inch, 6-inch, and 8-inch sizes with grit options from 36 to 220 depending on size, in packs of 50 (one 8-inch 150E option in a pack of 25). You can build a full grit progression across multiple sander sizes from one hook-and-loop system.
5", 6" & 8" SOLID H&L RED RESIN DISCS - 5" SOLID PSA (3M 363I) ROLL DISCS 100F GRIT: 5-inch solid PSA roll discs in 100F grit, available in packs of 100 or 200. This is a focused PSA option for 5-inch sanders running a single 100F grit, not a multi-grit kit.
5" SOLID PSA (3M 363I) ROLL DISCS 100F GRIT
Which setup fits you?
Choose solid H&L red resin discs if
- You change grits often and want reusable, hand-peel discs.
- You work across 5-inch, 6-inch, or 8-inch sanders and need a broad grit range.
Choose PSA roll discs instead if
- You run long single-grit sessions on a 5-inch sander and prefer a thin adhesive bond.
- You do not need multiple sizes or a full grit progression.
