Bathtub re-sealing caulk

Which brands AI mentions

Pro-Tips for a Lasting Seal:

1. Strip the old caulk completely : Use a scraper and a chemical caulk remover. Any leftover mold or old residue will prevent the new caulk from sticking.
2. Clean and dry : Scrub the joint with rubbing alcohol or a bleach solution and let it dry completely (at least 24 hours) before applying.
3. Fill the tub with water first : If it's an acrylic or fiberglass tub that flexes when filled, fill it with water before you caulk and keep it filled until the caulk cures. This weights the tub down so the caulk doesn't stretch and tear when you use it later.

If you'd like, tell me:

• What material is your tub (acrylic, cast iron, fiberglass)?
• Do you prefer a caulking gun or a squeeze tube?

I can give you a step-by-step application guide tailored to your setup.

$11.58

Why I’d choose it

• 100% silicone — ideal for a joint that gets repeatedly wet.
• 100% waterproof and permanently flexible, so it handles the small movements of a tub without cracking.gesealants.com+1
• Has 10-year mold-free product protection.
• It's water-ready in about 30 minutes under the manufacturer's specified conditions, although I'd still follow the package's full cure instructions before using the tub.gesealants.com+1
• Available in white, clear, almond and light gray, making it easy to match the existing tub/surround.gesealants.com

A good alternative

DAP Silicone Max Kitchen & Bath

$12.48

DAP Silicone Max is also 100% silicone, waterproof, flexible, and specifically designed for tubs/showers.www.dap.com

One important tip

Don't put new caulk over the old caulk. Remove all of the old bead, clean off soap/mildew residue, let the joint dry completely, and then apply the new silicone. GE specifically recommends replacing old sealant rather than simply covering it.gesealants.ca

Bottom line: For a typical tub-to-tile or tub-to-surround joint, I'd buy GE Advanced Silicone 2, 100% silicone, Kitchen & Bath. Avoid ordinary painter's caulk or basic acrylic caulk for this job.

If you tell me whether your tub is acrylic, fiberglass, porcelain/enamel, or tile, I can also tell you which color and application technique will give you the cleanest, longest-lasting seal.

2. Best alternative: DAP Silicone Max Kitchen & Bath

Another excellent 100% silicone option. It is waterproof, stays flexible, and offers mold and mildew resistance.www.homedepot.com+1

Typical listed price: about $12.50.

View at Home Depot

3. Best alternative for a quick return to water: Gorilla 100% Silicone Caulk & Seal

A waterproof, mold-resistant silicone that advertises readiness for water exposure in 30 minutes. Verify the specific package instructions and surface compatibility before use.www.homedepot.com

Typical listed price: about $10.

View at Home Depot

How to make the new caulk last

1. Remove all the old caulk. New silicone generally won't adhere reliably to old silicone or residue.
2. Clean and dry the joint completely. Remove soap scum, dirt, and mildew; let the seam dry before applying the new bead.
3. Apply a continuous, even bead. Use painter's tape on either side of the seam if you want crisp edges.
4. Let it cure before using the tub. Follow the exact product label. Some products advertise 30-minute water readiness, while others require longer; don't assume they're interchangeable.www.plumbinguide.com+2

One important exception: If your tub is acrylic or fiberglass, check the tub manufacturer's recommendations and the sealant's compatibility before buying. Also, 100% silicone is not paintable.

My bottom line: I'd buy GE Advanced Silicone 2 Kitchen & Bath in white for a typical white bathtub, or clear if you want the seam to be less noticeable.