The many roles of a filler
Filling & repairing
Purpose: to fill holes, grooves and cracks
Thickness: unlimited when using a powder filler. Up to 1 cm with ready mixed filler.
Surface area: small (locally).
Treating before applying filler
Purpose: to deal with any underlying substrate issues and irregularities before filling (for example, cracks, damp, corrosion...).
Thickness: various, from fractions of a millimetre to 5mm.
Surface area: small to large
Examples: Wall Hardener, Wood Hardener, Anti-Damp Treatment
Skim coating (levelling)
Purpose: to level out damaged or uneven surfaces.
Thickness: up to 5 mm
Surface area: Medium and large
Fine finishing (smoothing)
Purpose: to eliminate small irregularities before finish is applied.
Thickness: up to 1 mm or (locally) 2 mm
Surface area: medium and large
Shaping & formwork
Purpose: to reshape, reconstruct, make forms
Thickness: unlimited when using a powder filler.
Surface area: small (locally).
