C1 vs C2 tile adhesive — what is the difference? C1 is standard adhesive; C2 is high-performance. C1 cement adhesive suits ceramic wall and floor tiles in dry areas. C2 has stronger bond strength (≥1 N/mm²) and is needed for porcelain, large-format tiles, wet areas and outdoors. Use C1 for basic ceramic; use C2 for […]