Pre‑existing/hidden conditions or prior poor workmanship. Inherent material limits or normal outcomes of cleaning/sealing (e.g. oxidation, high porosity, efflorescence, colour variation, highlighting existing repairs/stains). Non‑compliance with our prep/protection/cure instructions in Clauses 3 and 6, any quote notes, SDS/TDS, or written post‑care. You acknowledge surfaces can be slippery when wet, freshly cleaned, pre‑treated, or freshly sealed – especially during the first 24–72 hours of cure (as advised in writing) and in shaded/damp or pool‑adjacent areas, on stairs/ramps, and with higher‑gloss sealers.