Bathroom Re-Caulking
Bathroom re-caulking is the service that strips every failed bead at the tub, shower, vanity, and toilet base back to clean substrate, treats any visible substrate mildew, and lays a fresh 100% mildew-resistant silicone bead with a 24 to 48-hour water cure — starting at $180 per area. The dark line of mildew along the tub-to-tile seam, the bead that pulled away from the wall at one corner of the alcove, the gap behind the vanity that smells faintly damp every morning — bathroom caulk is the first thing in a bathroom to fail and the last thing most homeowners get around to fixing. Handis strips every old bead to clean substrate (silicone does not bond to silicone), treats visible mildew on the surface with a real disinfectant on the full dwell time, dries everything down, and lays a fresh bead of 100% mildew-resistant silicone. Most master baths finish in 90 minutes.
Service
What Does a Bathroom Re-Caulking Visit Include?
Bathroom re-caulking is the work for every seam in a bathroom that has to keep water on one side — tub-to-tile, tub-to-wall, shower corners, shower-pan-to-wall, vanity-to-wall, vanity-to-backsplash, and the toilet base — stripped completely, treated for mildew, then re-bedded in 100% mildew-resistant silicone with a 24 to 48-hour cure. The fix is mechanically simple and chemically picky. Strip everything. Kill the mildew on the substrate. Dry the joint. Lay a fresh bead in the right product. Tool it dry. Give it the cure time it actually needs.
Strip Every Old Bead to Clean Substrate
Silicone does not bond to silicone — manufacturer technical data sheets (GE, DAP, Dow) are explicit about this. A fresh bead laid over old residue separates inside two months. We strip every joint with a utility blade plus a silicone-specific solvent (3M Caulk Remover or McKanica Silicone Caulk Remover), then wipe the joint with denatured alcohol and dry. The strip-and-prep step takes longer than the application; that is the work.
Mildew Remediation Prep
Visible mildew on the substrate under a failed bead does not disappear when you cover it — it grows back through. We treat the surface with a quaternary ammonium cleaner (the chemistry hospitals use on hard-surface disinfection), let it dwell the full ten minutes the label calls for, rinse, and dry with a heat gun on low or a microfiber towel before the new bead goes down. Bleach alone fades the visible stain but does not kill the organism in the porous substrate.
100% Mildew-Resistant Silicone Where It Gets Wet
Tub, shower, kitchen sink, exterior weather seal — these get 100% silicone (GE Supreme Kitchen & Bath, DAP Kwik Seal Ultra). Standard latex caulk is what most DIYers reach for and what fails inside twelve months in any wet location. Siliconized acrylic is paintable and right for trim — wrong for the tub. We pick by joint, not by habit.
Dry Tooling, Not Wet Finger and Soap
A bead tooled wet with a finger and dish soap leaves a hairline crack down the centerline as it cures. We tool dry with a proper caulk-shaping tool (Cramer profile tool or a Hyde plastic shaper), pulling once in a single motion. The bead profile ends concave, fully adhered to both edges of the joint, no thin spots.
24 to 48 Hour Cure — Stay Dry Until Then
100% silicone needs 24 to 48 hours before water exposure depending on humidity. Most master baths in Seattle in winter need the full 48 because the room never drops below 50% humidity overnight. We tell you on the call which cure window applies to your bathroom and leave a printed note on the bathroom door so a houseguest, a teenager, or a contractor in tomorrow does not run the shower at hour 12 and ruin the bead.
How Bathroom Re-Caulking Works
Six sequential steps from full strip of the old bead to the printed cure-time notice on the bathroom door — the actual sequence we follow on every bathroom re-caulk.
Strip Every Old Bead to Clean Substrate
Silicone does not bond to silicone — manufacturer technical data sheets are explicit. Strip every joint with a utility blade plus a silicone-specific solvent (3M Caulk Remover or McKanica), then wipe with denatured alcohol. The strip-and-prep step takes longer than the application.
Treat Visible Mildew with Quaternary Ammonium
Visible mildew on the substrate under a failed bead does not disappear when you cover it — it grows back through. Treat with a hospital-grade quaternary ammonium cleaner on the full ten-minute label dwell. Bleach alone fades the stain but does not kill the organism in the porous substrate.
Dry the Substrate Down
Rinse the disinfectant residue, then dry with a heat gun on low or a microfiber towel until the surface reads dry to a moisture meter. Fresh silicone laid on a damp substrate fails inside weeks because the moisture under the bead prevents full adhesion.
Lay 100% Mildew-Resistant Silicone
Tub, shower, vanity, and toilet base get 100% silicone (GE Supreme Kitchen & Bath or DAP Kwik Seal Ultra) — mildew-resistant by design, rated for permanent immersion. Standard latex caulk molds and shrinks inside a year in any wet location.
Dry-Tool with a Caulk-Shaping Tool
Pull a Cramer profile tool or Hyde plastic shaper once across each bead in a single motion. The cured surface ends concave, fully adhered, and crack-free. Wet-finger-and-dish-soap tooling leaves a hairline crack down the centerline as the bead cures.
Leave the Cure-Time Notice on the Door
100% silicone needs 24 to 48 hours before water exposure depending on humidity. A yellow sticky note on the bathroom door records the finish time and the earliest safe-shower time so no houseguest or teenager runs the shower at hour 12 and ruins the bead.
Bathroom Re-Caulking Pricing
Final pricing depends on linear footage, how aggressive the old-bead removal needs to be, and whether mildew on the substrate has to be killed and dried before fresh sealant goes on. Request a free estimate for an accurate quote.
Send us the bathroom — tub, shower, vanity — and we will quote the full re-caulk.
Why Handis for Bathroom Re-Caulking
Most bathroom caulking failures we redo are six to twelve months old — a DIY job, a contractor on the last day of a remodel who ran out of time, or a previous service tech who skipped the strip-and-prep step. The fresh bead looked perfect the day it was laid. Then water got behind it because the old residue was still there, or the mildew on the substrate grew through, or the latex caulk in the box was the wrong chemistry for a tub. The strip is 70% of the job and the part everyone wants to skip. We do not skip it.
Strip first, every time
Utility blade plus silicone-specific solvent, denatured-alcohol wipe, dry-down. The new bead bonds to the substrate, not to whatever was there before.
Quaternary ammonium for mildew, not just bleach
Bleach fades the stain but does not kill the mold in the porous substrate. Quaternary ammonium cleaners (the hospital-grade chemistry) on the full ten-minute dwell time, then rinse and dry. The mildew does not grow back through the new bead.
100% silicone, not latex
Standard latex caulk goes black with mildew and shrinks inside a year in any wet location. The tube on the truck is GE Supreme Kitchen & Bath or DAP Kwik Seal Ultra — 100% silicone, mildew-resistant by design, rated for permanent immersion. We do not carry latex caulk for wet jobs.
Dry tool, no soap water
Caulk-shaping tool pulled once in a single motion. No wet finger, no dish soap film on the bead. The cured surface ends concave, smooth, and crack-free.
Printed cure-time notice on the bathroom door
We leave a yellow sticky note on the bathroom door with the time we finished and the earliest safe-shower time. Houseguests, teenagers, and the cleaning service tomorrow do not get to ruin the cure by accident.
Estimate
Tell us which seams (tub, shower walls, vanity, toilet), whether there is visible mildew, and roughly how old the existing bead is — we will quote it.
Customer Reviews
Bathroom re-caulking reviews from real Handis customers.
Master bath alcove tub. The original caulk had gone black in two corners and was lifting at one edge. The tech stripped the whole perimeter with a utility blade and a solvent, treated the mildew, waited the full dwell time, then ran a clean white silicone bead. Showed me the cure-time sticky note on the door. 90 minutes start to finish.
We had tried this ourselves a year ago — the new bead came right off six months later. The Handis tech showed me a small jar of the residue he scraped out and explained that silicone will not stick to silicone. Did the strip properly, treated the mildew. Six months in, nothing has moved.
Walk-in shower, the wall-to-pan seam had cracked at the corner and we were getting a damp spot in the closet behind it. The tech stripped the entire vertical and horizontal seams, killed the mildew, ran the new bead. The damp spot stopped that week. He also pointed out that the grout in two spots needed touch-up later.
Two bathrooms in one visit. Master tub plus hall bath tub plus vanity seams in both. The tech worked through them in order so the cure timing did not stack up. Painted note left on each bathroom door. Two bathrooms, two and a half hours, one cleanup.
1950s tile bath. The grout was original and the caulk between the tile and the cast-iron tub had been redone at least twice without the old stuff being removed. Tech got every layer out, treated some mildew at one corner, ran a fresh bead. Looked like it did the day the bathroom was built.
Frequently Asked Questions
Common questions about bathroom re-caulking.