Fillers & Caulk
Smooth, Seal & Prepare with Confidence
At C Fixings, we supply a comprehensive range of fillers, caulks, sealants, and surface repair solutions to help decorators, builders, and DIYers prepare surfaces to a professional standard. Whether you're filling holes, sealing gaps, or finishing joints, our high-performance products deliver clean lines and long-lasting results.
Decorator’s Caulk
Acrylic Decorator’s Caulk
Flexible gap filler for cracks and joints in walls, ceilings, and trim
Paintable within 1 hour
Excellent adhesion on plaster, wood, brick, and concrete
Available in white, magnolia, grey, and black
High Flexibility Caulk
Ideal for areas prone to movement, including door frames, skirting boards, and window trims
Low shrinkage and easy to smooth
Excellent crack-resistance
Interior Fillers
Multi-Purpose Ready Mixed Filler
Smooth finish, easy sanding
For small cracks, dents, and surface imperfections
Ideal for walls and ceilings
Ready-to-use tub, no mixing required
Powder Fillers
Mix-as-you-go for large areas or deep repairs
Suitable for plaster, masonry, brickwork
Fast drying and shrink-resistant
Available in standard and lightweight formulas
Fine Surface Filler
For ultra-smooth finishes before painting
Perfect for smoothing hairline cracks and cosmetic surface defects
Exterior Fillers
Weatherproof Masonry Filler
Flexible, durable filler for brick, render, concrete, and stone
Resistant to rain, frost, and temperature changes
Can be sanded and painted over
Two-Part Fillers
For deep repairs, timber filling, and long-term durability
Suitable for wood, masonry, and metal
Hardens fast - ideal for high-traffic or load-bearing repairs
Available in white, natural wood, and stainable variants
Wood Fillers
Ready-Mixed Wood Filler
Ideal for repairing holes, splits, and imperfections in timber
Sandable and stainable
Available in light oak, dark oak, mahogany, white, and more
Two-Part Wood Filler
Strong and quick-setting for structural repairs
Perfect for windows, doors, and furniture
Compatible with nails, screws, and paint
Flexible & Silicone-Based Fillers
Bathroom & Kitchen Caulk / Sanitary Silicone
Waterproof and mould-resistant
Designed for wet areas like sinks, baths, and showers
Available in white, clear, and colour-matched options
Frame Sealant & Gap Filler
Exterior-grade, flexible filler for frames, sills, and expansion joints
High weather and UV resistance
Excellent adhesion to concrete, metal, uPVC, and brick
Specialist Fillers
Fire-Rated Sealants - For fire-safe installation around cables and pipework
Metal Fillers - For dents, rust holes, and surface repairs
Plaster Repair Compounds - Fast drying for patching walls and ceilings
Stain-Blocking Fillers - For covering water damage or nicotine stains before decorating
Trusted Brands We Stock
We supply industry-leading products from:
Toupret, Everbuild, Polycell, Ronseal, Bostik, Soudal, Gorilla, and more.
Key Applications
- Wall and ceiling crack repair
- Skirting and architrave sealing
- Wood repairs and trim filling
- External wall and masonry patching
- Silicone sealing in kitchens and bathrooms
- Fire safety and structural sealing
Why Buy Fillers & Caulk from C Fixings?
- Professional-grade products for trade and DIY
- Large range always in stock
- Colour-matched and specialist options
- Bulk orders and trade pricing available
- Fast UK-wide delivery