Dry-Fix Is Not X18: A ₩13,000 Lesson in Material Character

Day fifty-three. Today’s theme announced itself early: use materials for what they are, not what you wish they were.

The experiment that failed usefully. For the eave plastering campaign we tested Ssanggom Dry-Fix (₩13,000 per 20 kg) in place of our usual Ardex X18 — same family of cement product, friendlier price. On the brush-finish method it failed on both counts that matter: adhesion dropped (patches releasing from the substrate) and the material slumped downward before it could set. The diagnosis is simple in hindsight: Dry-Fix is engineered as a tile adhesive — it wants to be sandwiched under pressure, not sculpted on an exposed face. X18’s tackiness, the very property that makes it exhausting to mix, is what lets a brushed surface hold its shape overhead. Verdict, permanent: eave and ceiling plaster is X18 territory. No substitutes.

The pro’s leveling trick. In the annex bathroom (now 60% tiled), Cheolsu-hyung demonstrated a sequencing insight for mixed tile formats: where small accent tiles are planned, he sets the surrounding large-format tiles first — using their big, easily-leveled faces to establish the true plane — then fits the small tiles into the remaining zone, matching the plane the large tiles already fixed. Small tiles conform; large tiles govern. Order of operations as quality control.

Quiet fill-in work. Around the professionals, we closed our own gaps: the un-boarded wall sections in front of the bathroom finally got their GCS panels, and the substrate along the future window line was faired flat. Inside, the courtyard-facing eave plastering continued — cracks and voids pre-packed with foam and board scraps before cement, per doctrine — reaching about 40% of the zones needing repair.

Not a dramatic day. But renovation is mostly this: a hundred small surfaces, each moved one state closer to done — and one cheap experiment you’re glad you ran on a test patch and not a whole wall.