✓【BLACK PUTTY — UNDERWATER REPAIR FOR DARK SURFACES】Hand-kneadable 2-part epoxy putty that can be applied directly underwater and on wet surfaces — even on pipes under active water pressure. The black cure color matches boat hulls, dark pipe fittings, marine hardware, and metal surfaces where gray or white putty would stand out. 2 × 60g tubes included.
✓【BLACK BLENDS INTO DARK SURFACES】Gray and white putty are visible on boat hulls, black pipe, and dark metal hardware. This black formula cures to a color that matches fiberglass hulls, iron fittings, and dark-painted marine surfaces — the repair disappears into the surrounding area rather than drawing attention. No need to paint over for visual blending on dark substrates.
✓【5-MINUTE WORKING TIME】Cut the amount you need, knead by hand until uniform (3–5 minutes), and apply. The putty begins to harden within 5 minutes, giving you enough working time for emergency fixes on boats, pipes, and tanks. Full cure in 24 hours delivers steel-like hardness that can be drilled, sanded, and painted.
✓【BONDS METAL, FIBERGLASS, PVC & MORE】Adheres to metal, PVC, wood, glass, ceramic, fiberglass, stone, and many hard plastics. Especially effective on marine hardware, below-waterline fittings, pipe joints under pressure, and tank seams where water presence makes ordinary adhesives fail. Oil-resistant after full cure.
✓【BOAT, MARINE, PIPE & TANK REPAIR】Ideal for below-waterline hull patching, through-hull fitting repair, boat deck hardware, black pipe joints, water tank seams, and outdoor metal fixture fixes. Works underwater — no need to drain or dry. Must knead until completely uniform gray-black (streaks = weak cure). Wear gloves. Not for PE, PP, PTFE, or silicone.