How to Repair a Chipped Bathtub? | Refill, Sand, Match

Fixing a chipped bathtub is a straightforward DIY job: clean, sand, fill with a two-part epoxy repair compound, cure fully, then wet-sand smooth.

For the full breakdown, see our best Bathtub Chip Repair Kit guide.

A chipped bathtub is an eyesore that invites rust and further damage, but the fix takes about an hour of active work and a day of patience. Below is the step order that works, the common mistakes that sabotage the job, and where to find a color-matched repair kit if you’d rather grab one than hunt for supplies.

What You’ll Need Before You Start

Gather the supplies first because some repair compounds set in under ten minutes. You’ll need a two-part epoxy repair kit matched to your tub’s material — most run $15–$30. Prep tools include painter’s tape, fine-grit wet/dry sandpaper in 400, 600, and optionally 1000 grit, degreaser or rubbing alcohol, lint-free cloths, disposable gloves, and a small spatula, plastic knife, or brush for applying the filler.

How to Fix a Bathtub Chip: The Step-by-Step

Follow the order below and your patch will blend in well enough that only you’ll know where it was.

Step 1: Clean and degrease the chip
Wash the chip and a few inches around it with a degreaser, rubbing alcohol, or acetone on a lint-free cloth. Soap scum, conditioners, and body oils are the #1 cause of failed adhesion — a clean surface is non-negotiable.

Step 2: Sand to create tooth
Once dry, lightly sand the inside of the chip and the immediate edges with 400-grit wet/dry sandpaper. This roughens the surface so the filler bonds firmly. Wipe away all dust with a clean damp cloth and let the area dry completely.

Step 3: Mask the area
Apply painter’s tape around the chip, about half an inch from the edge. This protects the surrounding finish from accidental epoxy smears and makes cleanup easier.

Step 4: Mix and apply the filler
Mix the two-part epoxy repair compound exactly per the kit’s instructions — usually until the color and consistency are uniform. Work in thin layers, slightly overfilling the chip rather than trying for a perfectly flush surface in one pass.

Step 5: Let it cure fully
The filler will feel dry in a few hours, but multiple repair guides strongly recommend waiting the full 24 hours before sanding. A half-cured patch sands unevenly and may pull away from the edges.

Step 6: Wet-sand flush
Keep both the sandpaper and the repair area wet. Start with 600-grit to level the patch with the surrounding tub surface, then switch to 1000-grit for a smoother blend. Sand gently — the goal is to flatten the patch, not grind down the tub’s glaze. Wipe the area clean and dry when done.

Step 7: Touch up the color if needed
If the cured patch looks slightly off, apply a thin coat of color-matched epoxy or porcelain touch-up paint. Smooth it on lightly and let it cure again before using the tub.

Three Mistakes That Ruin a Bathtub Chip Repair

Skipping the degrease. Even a faint film of conditioner or soap residue prevents the epoxy from bonding. Spend the extra 30 seconds with alcohol or acetone.

Sanding too early or too dry. Wet-sanding is slower and safer — dry sanding can scuff the surrounding finish. Wait the full 24-hour cure time before sanding.

Mixing too much compound. Two-part epoxies begin setting in minutes. Mix small batches and apply quickly; you can always make more for a second thin coat.

For larger cracks, holes through the metal, or chipped areas larger than a quarter, professional resurfacing is the better route. But for the common small chip or scratch, the method above will restore the tub’s appearance and stop further damage.