C-TEC FC1 Ultimate Patch & Fill Compound 1 ltr

C-TEC FC1 Ultimate Patch & Fill Compound

Professional High-Strength, Lightweight Repair Filler – Smooth Finish, No Shrinking or Sagging

FC1 Ultimate Patch & Fill Compound from C-TEC is a revolutionary, high-strength, lightweight filling and repair solution designed for professional decorators, tradespeople and DIY enthusiasts.

Ideal for filling and repairing wider gaps, larger and deeper depressions up to 75mm, fine surface scratches and preparation before painting or wallpapering.

Its advanced formula provides excellent adhesion, outstanding coverage and a super-smooth finish, making it perfect for both interior and exterior surface repairs.

Key Features & Benefits

• No Slumping or Sagging – Ideal for overhead applications and ceilings.

• No Shrinking – Provides a reliable, long-lasting repair.

• Incredible Bonding Properties – Excellent adhesion to suitable surfaces.

• Exceptional Coverage – Covers up to 1.75m² at 3mm depth.

• Fast Painting Time – Paintable in as little as one hour.

• Easy to Sand – Can be sanded by hand when required.

• Super-Smooth Finish – Reduces preparation time before decorating.

• Drillable When Fully Cured – Suitable for applications requiring drilling after curing.

• Lightweight Formula – Easy to apply and work with.

Ideal Applications

FC1 Patch & Fill Compound is suitable for a wide range of decorating, maintenance and repair tasks, including:

• Filling cracks, holes and surface imperfections.

• Repairing larger gaps and deeper depressions.

• Smoothing walls and ceilings before decorating.

• Filling fine scratches and damaged surfaces.

• Overhead repairs where sagging must be avoided.

• Preparing surfaces for painting and wallpapering.

Application Instructions

FC1 is supplied ready to use and can be applied directly from the tub.

1. Apply using a straight-edged filling knife or spatula that has been dipped in water.

2. Work the filler firmly into cavities and damaged areas.

3. For a professional finish, dip the filling knife in water again and smooth the product level with the surrounding surface.

4. Avoid overworking the application and do not over-wet the filler.

5. Recommended sanding time is once dry. Sand with a fine-grade abrasive pad or sandpaper, or use a damp sponge for a smooth finish.

6. The product can be drilled once fully cured, if required.

7. Wash tools in warm water immediately after use.

Surface Preparation

For best results, ensure all surfaces are clean, dry and free from loose material, dust, grease and other contaminants.

• Slightly enlarge hairline cracks to allow adequate filler penetration.

• For very dusty surfaces, pre-application of a diluted PVA solution (5 parts water to 1 part PVA) is recommended.

• Lightly abrade gloss surfaces to provide a suitable key.

• Metal surfaces, including screw heads and beading, should be treated with a suitable rust-inhibiting oil-based paint.

• Do not apply to permanently wet or damp surfaces.

Drying & Overpainting

FC1 can be overpainted in as little as one hour, depending on application thickness and environmental conditions, using water-based primers and paints.

When using oil-based paints after the filler has fully cured, apply two coats of a suitable water-based primer, allowing temperatures to remain below 5°C during curing to be avoided. Then seal with an oil-based paint to protect against weathering.

Always ensure the filler is sufficiently dry or fully cured, as appropriate, before sanding, drilling or applying subsequent finishes.

Storage & Shelf Life

Replace the internal plastic cover securely after use and store in a cool, dry location.

• Protect from frost.

• Keep the container tightly closed when not in use.

• Shelf Life: 12 months.

Product Specifications