Porters Lime Proof Undercoat Sealer is a high‑performance, water‑based primer, sealer and undercoat designed for both interior and exterior painting projects. This ultra‑matte, white undercoat seals porous surfaces and prepares them for top coats, improving adhesion and providing a consistent base for most paints and finishes. Suitable for a wide range of substrates, it is quick drying with excellent masking properties, making it an ideal choice for professional painters and DIYers alike.

Key Features & Benefits

• Water‑based primer, sealer and undercoat in one product

• Suitable for interior and exterior applications

• Ultra‑matt white finish for superior coverage and surface uniformity

• Excellent masking of imperfections

• Thick, quick drying formulation for efficient application

• Prepares timber, masonry, plasterboard and other painted or unpainted surfaces

• Apply easily by brush, roller or spray

• Improves topcoat adhesion and ensures a durable finish