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Buying Guide
This guide explains what to check before using a two-part filler on pool-table slate seams. Confirm the seam method with the table manufacturer or installer before choosing a product.
Bondo is a family of two-part repair fillers. Use only a formulation and seam method accepted by the table manufacturer or specialist installer. A filler can finish a correctly supported joint; it cannot guarantee permanent alignment or make the table immune to movement.
Materials You'll Need
- Bondo and Hardener
- Putty Knife or Paint Scraper
- Mixing Board
- Disposable Gloves
- Eye protection and any respiratory protection specified by the product safety instructions
- Finishing tools specified by the installer and filler instructions
- Vacuum Cleaner
- Damp Cloth
- Stickers or Tape
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Step-by-Step Instructions
Level Your Slates First
Before filling, have the supporting frame and slate sections leveled and their seams brought into the same plane. Filler cannot repair a moving frame or replace correct shimming and fastening.
Identify Screw Holes to Fill
Have the installer identify which countersunk holes need filling under the cloth and confirm the method for preserving future access to fasteners.
Prepare Screw Holes
If the installer specifies tape or another barrier over fasteners, apply it by that method. Keep the covering below the finished plane and preserve future access to the screws.
Protect Your Work Area
Lay down cardboard or a blanket under the table edges to catch drips. Work in a well-ventilated area due to fumes.
Clean the Slate Surface
Use a damp cloth to remove dust and debris. Ensure the surface is completely dry before proceeding.
Mix the Bondo
Follow the exact product label. 3M lists a 3–4-minute working time for Bondo Original Filler; other formulas and conditions differ. Mix only a small amount you can place within its stated working time.
Apply the Bondo
Press Bondo into screw holes and spread it over slate joints. Aim for smooth coverage with minimal excess.
Remove Excess Bondo
While still pliable, gently scrape off excess with the putty knife. Be careful around slate edges.
Allow to Harden
Follow the product’s sanding and cure instructions rather than treating “hard to the touch” as full cure. 3M lists approximately 20 minutes before sanding Original Filler under its stated conditions; temperature and hardener ratio affect timing.
Sand the Surface
Have the installer finish the filler flush without removing surrounding slate. Aggressive power sanding can alter the playing plane. Follow the product safety instructions for dust control and protective equipment.
Clean Up
Remove dust using the product’s recommended dust-control method, then ensure the prepared surface is clean and dry before the cloth is fitted.
Final Inspection
Have the installer check that the finished seams are flush with the adjoining slate and that the bed remains level. A hand-feel check alone does not establish a precise playing plane.
Additional Tips
- Bondo sets quickly — have a clear plan before applying.
- Use a separate mixing board to avoid staining the slate.
- Proper ventilation and protective gear are essential.
- Dispose of unused Bondo according to local regulations.
For a visual example, Average Joes Pool has a video on this process. Treat it as an example of one installation method and follow the instructions approved for the actual table and filler.
Comparing Seam Materials?
Check out our alternative guide to sealing with beeswax.
