Fillers are used to repair cracks, holes, and dents in surfaces such as plaster, wood, and MDF, creating a solid base ready for sanding and painting. Caulk, on the other hand, is ideal for sealing joints and gaps—particularly where movement may occur—helping to create clean, finished lines between surfaces.

Choosing the Right Filler or Caulk

The right product depends on the type of repair and the surface you’re working on. Fillers are best suited to fixing damage such as cracks, holes, and uneven areas, as they dry hard and can be sanded smooth before painting.

Caulk is ideal for finishing work, such as sealing gaps between skirting boards and walls or around architraves, where slight movement can occur over time. Its flexibility allows it to expand and contract without cracking, helping maintain a neat finish.

For best results, ensure surfaces are clean, dry, and free from dust before application, and allow adequate drying time before sanding or overpainting.

Types of Fillers & Caulk

General Purpose Fillers: Ideal for repairing cracks, holes, and surface damage in walls and ceilings
Lightweight Fillers: Easy to apply and sand, perfect for small repairs and quick fixes
Wood Fillers: Designed for repairing dents, nail holes, and imperfections in timber, creating a smooth, paintable surface
Powder Fillers: Suitable for deeper repairs and larger holes, offering strong, durable results
Decorators’ Caulk: Flexible, paintable sealant for filling gaps between skirting boards, walls, and trim

Benefits of Using Fillers & Caulk

Smooth, professional finish: Fillers create a flat, even surface ready for painting or decorating
Improved paint results: Proper preparation helps improve coverage, adhesion, and final appearance
Durable repairs: Fillers harden to provide long-lasting repairs that can withstand everyday wear
Flexible gap sealing: Caulk remains flexible, preventing cracks forming in joints over time
Versatile applications: Suitable for walls, ceilings, woodwork, and interior trim

Recommended for Walls, Ceilings & Woodwork

Walls & Ceilings: Use fillers to repair cracks, holes, and damaged plaster before painting
Woodwork & Trim: Apply wood filler to fix dents and imperfections in doors, skirting boards, and joinery
Skirting & Architraves: Use decorators’ caulk to seal gaps and create clean, finished edges
Preparation Work: Essential for achieving a high-quality finish on any decorating project

For best results, pair with products from our Paint range for topcoats, and explore our full selection of Tools and Preparation products to complete your project.