How to Refinish a Bathtub Yourself
Complete step-by-step guide to DIY bathtub refinishing. We'll show you exactly how to do it — and why 68% of DIY jobs fail within 2 years.
DIY Bathtub Refinishing: Step-by-Step
Here's exactly how to refinish a bathtub yourself. Follow these steps carefully.
Gather Materials
You'll need: refinishing kit ($30-80), 400-grit sandpaper, trisodium phosphate (TSP), painter's tape, drop cloths, respirator mask (N95 minimum), chemical-resistant gloves, and good ventilation.
Deep Clean the Surface
Mix TSP with water per package directions. Scrub the entire tub surface to remove soap scum, body oils, and residue. Rinse thoroughly and let dry completely. This is the most critical step — any residue will cause peeling.
Sand the Entire Surface
Using 400-grit wet/dry sandpaper, sand the entire tub surface to create "tooth" for the new coating to grip. Sand in circular motions. Wipe clean with tack cloth.
Repair Chips and Cracks
Fill any chips or cracks with the epoxy filler included in your kit (or buy separately). Let dry per instructions, then sand smooth and flush with surrounding surface.
Tape and Mask Everything
Apply painter's tape to all edges, drain, overflow, faucet, and any area you don't want coated. Cover floor and surrounding surfaces with drop cloths. Be thorough — overspray travels.
Apply Primer (If Included)
If your kit includes primer, apply a thin, even coat using the roller or spray provided. Let dry completely per instructions (usually 1-2 hours). Don't rush this step.
Apply Refinishing Coating
Apply 2-3 thin coats of the refinishing coating. Thin coats are critical — thick coats cause drips, bubbles, and peeling. Wait the recommended time between coats.
Let Cure Completely
Remove tape carefully. Let the tub cure for 24-72 hours (follow kit instructions). Don't use the tub, run water, or let anything touch the surface during this time. Full cure takes 7 days.
Why 68% of DIY Refinishing Jobs Fail
We fix DIY refinishing jobs every week. Here's why they fail.
Inadequate Surface Prep
Even tiny amounts of soap residue or body oil prevent adhesion. Pros use acid etching and industrial cleaners that consumer kits don't include.
Wrong Conditions
Temperature and humidity must be in a specific range. Too cold, too hot, or too humid and the coating won't cure properly.
Thin Consumer Coatings
DIY kits use coatings 1-2 mils thick. Professional coatings are 5-8 mils thick — 3-5x more durable and chip-resistant.
Rushing the Process
Most DIYers rush between coats or use the tub too soon. This causes peeling within weeks or months.
DIY vs Professional Refinishing
DIY Kit
- ✗ 1-3 year lifespan
- ✗ 68% failure rate
- ✗ No warranty
- ✗ Toxic fume exposure
- ✗ 4-8 hours of work
- ✗ No primer, thin coatings
- ✗ Can't touch up — strip to redo
- ✗ If fails: $1,200-$1,700 to fix (2x cost)
Professional
- ✓ 10-15+ year lifespan
- ✓ Professional-grade coating
- ✓ 5-year warranty
- ✓ True 2-part epoxy + primer
- ✓ $80-$120 touch-up visits if needed
- ✓ We handle ventilation
- ✓ Done in 3-4 hours
- ✓ Chip/crack repair included
Get professional results with a 5-year warranty. Free quote in 2 minutes. why DIY reglazing fails
DIY Refinishing FAQs
How much does it cost to refinish a bathtub yourself?
DIY bathtub refinishing kits cost $30-$80 at Home Depot or Amazon. Add $20-40 for sandpaper, tape, drop cloths, and respirator. Total: $50-$120 plus 4-8 hours of your time.
How long does DIY bathtub refinishing last?
DIY refinishing typically lasts 1-3 years before peeling, yellowing, or chipping. Professional refinishing lasts 10-15+ years because pros use industrial coatings and proper surface preparation techniques. DIY vs professional
Why does DIY bathtub refinishing peel?
DIY refinishing peels due to: inadequate cleaning (most common), not sanding thoroughly, wrong temperature/humidity during application, coats applied too thick, or using the tub before full cure. Even one mistake causes peeling.
Can I refinish over old refinishing?
Not recommended. If the old coating is peeling, you must strip it completely before refinishing. This adds $100-200 to professional jobs. DIY stripping is difficult and involves harsh chemicals.
Is DIY bathtub refinishing worth it?
For most homeowners, no. You save $500-750 upfront but risk: peeling within 1-2 years, toxic fume exposure (even with ventilation), and potentially paying a professional to strip and redo the work. The "savings" often become a sunk cost.