KEPTFIT New Type White Waterproof Sealant Mastic main image, ready-to-use repair clay for quick wall and drain fixes.
KEPTFIT sealing clay in a soft moldable state for easy wall hole repairs.
KEPTFIT sealing clay filling a wall hole with a durable patch.
KEPTFIT sealant clay sealing a drain connection for moisture protection.
KEPTFIT sealing clay blocks odors in damp spaces for cleaner rooms.
KEPTFIT cure time—2–3 days to set before water exposure.
KEPTFIT packaging showing 8 bags per package for easy portioning.

KEPTFIT

KEPTFIT New Type White Waterproof Sealant Mastic – 12-Pack Repair Sealing Clay for Holes, Drains, Walls

High-performance tools and home improvement made for confident daily results

$23.48

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Why customers choose TaskHolt Tools

KEPTFIT New Type White Waterproof Sealant Mastic — versatile, moldable repair clay

Meet KEPTFIT's New Type White Waterproof Sealant Mastic, a soft, moldable repair clay designed for quick, moisture-resistant fixes around the home. Its pale white color blends with many wall surfaces, and the pliable texture makes it easy to shape to irregular gaps. Once dry, it forms a waterproof layer that helps protect vulnerable areas from moisture and dampness without a heavy toolkit.

This sealant clay serves multiple purposes: it can fill small wall holes, seal drain connections, patch gaps around ducts, and act as a waterproof insulating sealant. Its flexible composition supports a range of tasks, offering a practical, low-mess solution for everyday repairs.

What it can do

  • Hole filler for walls and masonry
  • Duct sealant for small gaps in ceilings and walls
  • Wall putty for temporary repairs and patching
  • Waterproof insulating sealant for moisture-prone surfaces
  • Odor blocking in damp spaces to improve room feel

How to use for best results

  • Clean and dry the surface before applying the clay
  • Shape the clay by hand to fit the gap or hole
  • Apply and allow to dry for 2-3 days to set
  • For optimal performance, avoid water exposure and let full cure occur over 3-5 days

Packaging and convenience

The kit is designed with multi-pack options for storage and value. Each package includes 8 bags of sealing clay, with individual bags weighing 30 g. A 6-pack style setup can help you keep a portion handy for future repairs.

Why choose KEPTFIT

Designed to tackle everyday repair tasks with a straightforward, low-muss approach. The sealant clay remains soft for easy shaping and becomes sturdy once cured, delivering a reliable moisture barrier on a variety of surfaces. It is a practical addition to a home toolbox for quick fixes and ongoing maintenance.

FAQ

Q: What surfaces is KEPTFIT New Type White Waterproof Sealant Mastic suitable for?

A: Suitable for walls, holes, drains, ducts, and moisture-prone surfaces; clean and dry the area before applying, and allow full cure.

Q: What is the drying and curing time for this sealant mastic?

A: Initial set in 2-3 days; avoid water exposure until fully cured in about 3-5 days.

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