| S.No. | Checkpoint | IS Requirement | Status |
|---|---|---|---|
| A. MATERIAL VERIFICATION & CERTIFICATION | |||
| A1 | Sealant/waterproofing material has valid product datasheet and safety certificate Acceptance: Datasheet provided; Material grade specified; Expiry date valid; Proper storage verified | Cl. 3 — Material certification | OK NC NA HOLD |
| A2 | Sealant type compatible with metal substrate (non-corrosive, adhesive properties confirmed) Acceptance: Compatible per datasheet; No staining or corrosion on test surfaces; Proper primer applied | Cl. 4 — Material compatibility | OK NC NA HOLD |
| A3 | Sealant stored in dry, cool location; containers sealed and protected from UV exposure Acceptance: Storage <25°C; Containers unopened until use; No skin formation; Within shelf life (typically 12 months) | Cl. 5 — Storage conditions | OK NC NA HOLD |
| B. JOINT & SEAM PREPARATION | |||
| B1 | All roof joints, seams, and overlaps identified and marked for waterproofing treatment Acceptance: All laps, ridge caps, eaves, and penetrations marked; No joints missed | Cl. 6.1 — Joint mapping | OK NC NA HOLD |
| B2 | Joint surfaces cleaned: dust, rust, paint chips, and loose material removed Acceptance: Surfaces swept/wire brushed; No loose scale or paint; Visual inspection confirms cleanliness | Cl. 6.2 — Surface cleaning | OK NC NA HOLD |
| B3 | Joint surfaces wiped with solvent/cloth to remove dust and moisture residue Acceptance: Surfaces dry; No visible moisture; Wiped with clean lint-free cloth post-cleaning | Cl. 6.3 — Moisture removal | OK NC NA HOLD |
| B4 | Primer application where required per sealant datasheet (typically for metal surfaces) Acceptance: Primer applied per datasheet; Even coverage; Drying time observed (typically 10-30 min) | Cl. 6.4 — Priming requirement | OK NC NA HOLD |
| C. SEALANT APPLICATION | |||
| C1 | Sealant applied in continuous bead along entire joint length; no gaps or skips Acceptance: Continuous bead observed; No gaps >2mm; All seams fully covered | Cl. 7.1 — Continuity requirement | OK NC NA HOLD |
| C2 | Bead width and depth appropriate for joint type (typically 10-20mm wide, 5-10mm deep) Acceptance: Width 10-20mm; Depth 5-10mm for metal joints; Uniform cross-section | Cl. 7.2 — Bead profile specification | OK NC NA HOLD |
| C3 | Sealant adheres fully to joint sides; no air bubbles, voids, or poor bonding visible Acceptance: Full adhesion to sides; No voids; Probe test shows solid contact (no separation) | Cl. 7.3 — Bond quality | OK NC NA HOLD |
| C4 | Sealant cured per datasheet time (typically 24-48 hours before water exposure) Acceptance: Minimum cure time observed; Surface tack-free; No premature water/moisture contact | Cl. 7.4 — Curing duration | OK NC NA HOLD |