Mastic was applied too thick and messy
Mastic should be applied cleanly over a mechanically sound joint. Too much gloop wastes material, slows cure time, and makes inspection/cleanup harder.
Stop if
- You're painting with mud. Don't cake the mastic on three inches thick. Lay down a clean two-inch swipe, bed your mesh tape inside it, and skin it over clean so it cures tight without wasting material.
Watch out
- Do not use a bucket of sealer to hide bad assembly.
Check
- Confirm the mechanical joint is closed first.
- Brush a clean band centered on the seam.
- Use mesh where the pressure class/shop detail calls for it.
- Avoid sagging globs and open ridges.
- Let it cure per product direction before testing/cover.
Steps
- Confirm the mechanical joint is closed first.
- Brush a clean band centered on the seam.
- Use mesh where the pressure class/shop detail calls for it.
- Avoid sagging globs and open ridges.
- Let it cure per product direction before testing/cover.
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