Material reference

Start with what the joint is actually touching.

Coatings, porosity and movement matter. These are the surface groups currently understood by the finder.

Glazed wall and floor tile.

Window, shower and architectural glass.

Bare, anodized or coated aluminum trim.

Cast concrete and cementitious surfaces.

Fired clay brick and similar porous masonry.

Sound, fully cured painted timber or trim.

Acrylic bath and shower surfaces.

Rigid PVC pipe, frames and trim.

Painted interior gypsum board.