Caulk Tube Ooze Fix
Venting the trapped factory air behind a caulk tube’s plunger with a small X cut so the bead stops when the trigger does.
Caulk Tile's Inside Corners — Grouted Corners Are Built to Crack
Technique: Caulk Tile Corners, Not Grout
The Problem
Cracked grout lines running up a shower's inside corners aren't bad luck — they're physics. A tile assembly expands and contracts with temperature and moisture, and it moves most where two planes meet. Grout is rigid, so when you pack it into a corner, you've locked the assembly against movement it's going to make anyway. The corner cracks first; locked in hard enough, the failure can go deeper than cosmetics.
The Technique
The tile standard (ANSI) is explicit — every change of plane gets a flexible joint, not grout:
- Grout the field, caulk the corners. Wall-to-wall corners, wall-to-floor, wall-to-tub, around penetrations — any place the plane changes, the joint gets sealant.
- In wet areas, use 100% silicone. Urethane and polysulfide sealants are also standards-approved; silicone is the common choice for showers.
- Backer rod first in wider joints. The foam rod fills the depth so the sealant forms a proper joint that can stretch, instead of a solid plug that can't.
The flexible joint absorbs the movement, the grout in the field stays uncracked, and the shower ages the way the tile promised it would.
Pro tip: "I've grouted corners for 20 years and never had a callback" is the standard objection — but as the creator points out, homeowners don't call the tile setter when a corner cracks years later; they call it aging. Color-matched caulk in sanded and unsanded textures exists for nearly every grout line, so the corner doesn't even have to look different.
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