Everything you need to fill holes and rust-outs on your vehicle or boat. Ready mix pouches include the original 2-part formula of filler and hardener. Save time with guess-free, ready-mix pouches that eliminate the need to measure filler and hardener. Two-part techology chemically bonds to the surface for permanent repair. Top coat of Bondo Glazing and Spot Putty is recommended to fill pin holes and small imperfections for a smooth finish.