Spakfilla Heavy Duty
Features
- Tough, durable ready‑mixed filler
- Interior & exterior use
- Easy to sand
- Light grey colour
Important Information
- Suitable for mortar, wood, brick, masonry, stone, plaster, concrete, and primed metal
- Surfaces must be clean, dry, and free of loose material
- Exterior surfaces should be primed and painted over
- Not suitable for application below 5 °C or in wet conditions
Downloads
- Technical Details
- Limitations
- Directions For Use
Technology |
Water‑based filler |
Appearance |
Paste, light grey |
Packaging |
435g / 385mL Tub |
Dry / Paint Time |
2‑3 hours for 2 mm application; longer for thicker layers or in cold conditions |
Sanding |
Sand to a feathered edge once completely set |
- Not for use in wet conditions or below 5 °C
- Exterior surfaces must be painted to protect from rain
- Not recommended where building movement is expected — use a flexible sealant instead
- Clean and dry surfaces; remove loose material. Prime exterior surfaces.
- Press filler firmly into cracks/holes with a flexible spatula; smooth off.
- For deeper gaps, build up in 6 mm layers, allowing each layer to dry.
- Allow ~2‑3 hours drying for 2 mm applications (longer for thicker or in cold conditions).
- Sand smooth once set; feather edges.
- Paint over with water‑ or oil‑based paints, undercoat if needed.
- Clean tools with water before filler sets.
Product Range
Spakfilla Rapid
- Fast-drying (paintable in 30 minutes in thin applications)
- Lightweight, ready-mixed filler
- Virtually non-shrinking, non-cracking
Spakfilla Heavy Duty
- Tough, durable ready‑mixed filler
- Interior & exterior use
- Easy to sand
Spakfilla Colour Smart
- ColourSmart indicator: goes on pink, dries off-white
- Ready-mixed formula (no mixing required)
- Minimal shrinkage; single application for many fills
Spakfilla Wall Repair Kit
- All-in-one kit (patch, filler, spatula, sanding block)
- Can repair holes/cracks up to ~8 cm wide
- Uses Spakfilla Rapid included in kit
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