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    Undercoats & Primers

    Get a stronger, longer-lasting finish with our range of Undercoats & Primers, essential for preparing surfaces before painting. Using the right primer or undercoat helps paint adhere properly, improves coverage, and creates a smoother, more consistent final colour—especially on tricky or porous surfaces. Whether you’re decorating a room, painting woodwork, or tackling a renovation project, proper preparation makes a big difference to both appearance and durability.

    Primers are designed to seal surfaces and improve adhesion, making them ideal for new plaster, bare timber, metal and previously painted surfaces. Undercoats help build an even base layer, improving topcoat coverage and reducing the number of coats needed for a clean finish. Together, these products support better results on walls, ceilings, doors, skirting and trim, helping prevent patchiness, staining and uneven absorption.

    For best results, ensure surfaces are clean, dry and sound before priming, choose products suited to the material and paint type, and follow recommended drying times before applying topcoats. Using the right preparation products helps achieve a professional finish and reduces the chance of peeling or flaking over time.

    Shop online today for undercoats and primers with delivery and collection available.

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    Picture of PT STAIN BLOCK AEROSOL 500ML

    PT STAIN BLOCK AEROSOL 500ML

    Quick-Drying Spray Stain Block Primer for Interior Repairs Polycell Trade Problem Solving Stain Block Aerosol 500ml is a high-performance spray primer designed to permanently seal and cover stubborn interior stains before painting.…
    £22.64 INC VAT