Pressure Sensitive Adhesives

Pressure Sensitive Adhesives - PSA Backing Sheets for Flat Lap Disc Mounting, 6" and 8"

Our Pressure Sensitive Self-Adhesive (PSA) Backing sheets provide a clean, reliable adhesive layer for mounting diamond laps, smoothing pads, lapping films, and master laps to flat lap machine platens and backing plates. No heat, solvents, or tools required - simply peel and stick for instant attachment, and peel off cleanly for removal. Available in 6" ($5.00) and 8" ($6.00) sizes, sold in 5-piece packs.

Shop Pressure Sensitive Adhesives - From $5.00 / 5-Pack

Available Sizes and Pricing

Size Pack Price
6" x 1/2" 5 pcs $5.00
8" x 1/2" 5 pcs $6.00

Compatible Applications

  • Diamond lap mounting - secure PSA attachment of diamond flat lap discs to machine platens
  • Lapping film disc mounting - PSA backing for silicon carbide, aluminium oxide, and diamond lapping films
  • Smoothing pad mounting - attach resin diamond smoothing pads to flat lap backing plates
  • Master lap mounting - PSA layer between master lap and machine platen for stable attachment
  • Polishing pad mounting - felt, canvas, and leather polishing pads on flat lap machines
  • 6" and 8" flat lap machines - standard sizes for hobby and professional flat lap platens

Key Features

  • No heat or solvents required - Peel-and-stick application and clean removal
  • Versatile compatibility - Works with diamond laps, smoothing pads, lapping films, and master laps
  • 5-piece packs - Economical supply for regular lap changes
  • Secure adhesion - Holds firmly during grinding and polishing without slipping

Related Tools

Frequently Asked Questions

  • Q: What is PSA backing used for on a flat lap machine?
    A: PSA (pressure sensitive adhesive) backing is used to mount diamond laps, smoothing pads, lapping films, and polishing pads to the platen or backing plate of a flat lap machine. The adhesive layer holds the abrasive disc firmly in place during grinding and polishing, preventing slipping or lifting during use.
  • Q: How do I remove PSA-backed laps without damaging them?
    A: Peel the lap off the backing plate slowly from one edge. If the adhesive is stubborn, warm the backing plate slightly with a heat gun or warm water to soften the adhesive before peeling. Clean any adhesive residue with isopropyl alcohol before applying a new PSA sheet.
  • Q: Can PSA backing be used with wet lapidary grinding?
    A: Yes - PSA backing holds securely during wet lapidary grinding. However, prolonged soaking or high-pressure water can weaken the adhesive bond over time. For heavy wet grinding applications, magnetic backing systems provide a more secure attachment unaffected by water.