Selleys Spakfilla Heavy Duty is a multi-purpose, tough and durable, light grey ready-mixed filler. 

Features
Suitable for interior and exterior applications
Good adhesions to most surfaces
Water and weather resistant
Fill cracks and holes in a single application
Pre-mixed and ready to use
Minimal shrinkage so no need to overfill
Very fast drying allowing sanding and painting in a short time period
Comes complete with a filling spatula for ease of use
Water-based, so can be cleaned up with water
Paintable with oil and water-based paints

Where can this product be used?
Filling holes, dents, cracks or chips in interior and exterior applications where no structural movement occurs 
 

What materials is this product suitable for?
Mortar
Masonry
Concrete
Wood
Stone
Primed metal surfaces
Brick
Plaster

Ensure surfaces are clean, dry and free of loose material. Using the flexible spatula provided on the lid, press the filler firmly into the crack or hole and smooth off surface; there is no need to overfill. For deeper cracks, apply in 6mm layers allowing each layer to dry before applying the next.
Lightly sand back any excess filler from the surface after product dries (2-3 hours for 2mm applications).
Dust off any loose dust before applying undercoat and painting with water-based paints or oil-based paints. 

Limitations:

Product is not flexible so not suitable for use between surfaces that are subject to the structural movement - use Selleys No More Gaps.
Avoid using below 5°C or in wet conditions.

Painting with oil-based paints is not recommended until 24 hours after the filler has been applied.
Water-based paints may be used immediately after the filler has set.
If the filler is found to have stiffened prior to use, stir product. The product that has actually hardened should be discarded. If still too dry add one teaspoon of water and stir again to desired consistency.

Application tools may be cleaned with water.
Before painting, clean dust and filler particles using Selleys Sugar Soap or Selleys Super Kleen.
In exterior applications, protect from rain until dry and painted over with 2 coats of paint.
Some paints may temporarily discolour when applied over the filler, but will revert to the correct colour once dry.
For applications more than 2mm deep, or in cold or humid conditions, expect longer drying times.
Keep container closed when not in use.