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    Car Body Fillers

    Dents, dings, and deep scratches are an unfortunate reality of the road, but they don't have to be a permanent feature of your Vehicle. The secret to a flawless, showroom-quality repair lies in the preparation, and that starts with a high-quality car body filler. At Nebula Paints, we supply a professional range of automotive body fillers, trusted by body shops and restoration experts to perfectly smooth out imperfections and create the ideal surface for Paint.

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    On saleRelo Super 2K Polyester Universal Putty (1kg)
    Relo

    Relo Super 2K Polyester Universal Putty (1kg)

    Sale priceFrom £4.99 Regular price£8.46
    On saleP85 FIller 0.25 Kg - Mipa Fine White Filler canister for automotive refinishing and repairs.
    Save 38%Nautic Ultra Light Epoxy Filler product image showing two cans of epoxy filler and hardener for boat repair.
    Save 37%Airo-Chemie Nautic Epoxy Filler 4.5kg - Light Grey can with epoxy hardener and filler components.
    P51 1Kg Glass Fibre Filler Incl. Hardener (1KG) in a tin container by Mipa, green polyester filler for automotive repairs.
    N30 Nitrocombi Stopper 0.25 Kg in a tube for automotive refinishing, superior adhesion and quick drying.
    Save 54%Mipa 2K Primer Kit including 2K Multifiller, H 10 hardener, and silicon remover for automotive priming.
    Mipa Paints Limited

    Mipa 2K Primer Kit

    Sale price£19.99 Regular price£43.87
    Mipa P60S Grey Polyester Spray Filler with Hardener 1Ltr in canister, ideal for automotive and industrial filling applications.
    On saleRelo 4+1 2K HS Acrylic Filler
    Relo

    Relo 4+1 2K HS Acrylic Filler

    Sale priceFrom £9.99 Regular price£16.94
    On saleRelo Glass Fibre Bodyfiller 500g in a round container with a transparent lid.
    Relo

    Relo Glass Fibre Bodyfiller (500g)

    Sale priceFrom £3.99 Regular price£6.12
    On saleMonofil Bridging Filler inc Hardener - Glass Fibre Reinforced Putty for Automotive & Marine Repairs
    On saleMipa RAL Spray Paint (400ml) and grey paint can in a professional painting setup.
    2 colors available
    On saleMonofil Fine Stopper including Hardener (1LT) - Professional 2K Finishing Putty for Metal & GRP
    Monofil

    Monofil Fine Stopper including Hardener (1L)

    Sale priceFrom £14.99 Regular price£16.15
    Millaco Stop Compact AC 815 2K Filler
    3 colors available
    Save 42%Relo Spray Polyester-Spray Filler (1 kg) in a can, designed for filling deep sanding scratches and surface imperfections.
    Relo

    Relo Spray Polyester-Spray Filler (1kg)

    Sale price£6.99 Regular price£11.97
    Save 38%Nautic Epoxy Filler Light Grey + Spatula in a container, ideal for fiberglass boat repairs and water-resistant applications.

    Car Body Fillers Frequently Asked Questions

    Can body filler be applied over paint?

    For a permanent and professional repair, the answer is no. Body filler must be applied directly to a properly prepared bare metal surface. Paint provides a weak, unstable foundation that will prevent the filler from bonding securely to the steel or aluminium underneath. Applying filler over paint will almost certainly lead to future peeling, bubbling, or cracking as the paint itself lifts away from the metal.

    The correct procedure is to always sand the area down to clean, bare metal. We recommend using 80-grit sandpaper to remove all paint and create a coarse, scratched surface that gives the filler a strong mechanical grip for maximum adhesion and a truly durable, long-lasting repair.

    Can body filler be applied over primer?

    Body filler should not be applied over primer. The correct and essential order of operations for a lasting repair is Metal > Body Filler > Primer > Paint.

    Think of it this way: the filler’s job is to shape the repair on the bare metal, while the primer’s job is to seal the porous filler and the surrounding metal, creating a perfect, non-absorbent surface for the topcoat of paint to adhere to. Applying filler on top of primer reverses this process, creating a weak foundation. For tiny pinholes or minor scratches in the primer itself, a very thin layer of glazing putty is the correct product, but for all standard shaping and dent repair, the filler must go on the bare metal first.

    Can body filler get wet?

    No, body filler should be kept dry at all times. While modern body fillers are water-resistant once fully cured, they are also hygroscopic, meaning they can absorb moisture from the air.

    If cured filler gets wet or absorbs humidity before being sealed, that moisture becomes trapped underneath the primer and paint. When the panel heats up in the sun, this trapped moisture can cause blistering, bubbles, and eventual paint failure from the inside out. For this reason, you must:

    • Ensure the filler is fully cured before sanding.
    • Always seal your sanded body filler with a quality automotive primer as soon as possible. The primer creates the essential waterproof barrier that protects your repair work.

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