Sandtex Smooth Masonry Paint

Sandtex Microseal Ultra Smooth Masonry Paint is a smooth exterior wall coating designed to protect and refresh weathered masonry surfaces. Its breathable Microseal technology helps prevent water ingress while allowing trapped moisture to escape, helping reduce peeling, blistering and flaking caused by harsh weather conditions. Ideal for exterior walls, render, roughcast, concrete, stone and previously painted masonry surfaces.

The smooth matt finish helps improve the appearance of tired render, uneven walls and ageing exterior surfaces while providing a durable, dirt resistant coating that stands up to the changing UK climate. Shower resistant in just 1 hour, it is suitable for a wide range of exterior projects where a long lasting, low maintenance finish is required.

For rough or uneven masonry surfaces, or to help disguise hairline cracking, see Sandtex Microseal Textured Masonry Paint.

Choosing the Right Colour

Exterior colours can appear very different depending on lighting conditions, surrounding buildings and surface texture. We recommend testing your chosen shade in a small, inconspicuous area before starting your project to check the final appearance throughout the day.

For the most accurate result, view the colour during bright daylight, overcast conditions and late afternoon light, as exterior colours can appear lighter or darker depending on the weather and time of day.

Please note: It can take up to 7 days to be fullly cured time to ensure maximum durability and weatherability.

All surfaces must be sound, clean, dry and free from dirt, grease, dust and any loose material that may affect adhesion. Proper preparation is essential to achieve a smooth, long lasting finish on exterior masonry surfaces.

• New render, concrete and masonry surfaces should be fully cured and completely dry before painting
• Remove all loose, peeling or flaking coatings by scraping and brushing with a stiff bristle brush
• Repair cracks and damaged areas with Sandtex Ready Mixed Masonry Filler before application to create a smooth, even surface
• Treat mould, algae and organic growth with Sandtex Fungicidal Wash before painting
• Weathered, chalky and porous surfaces should be brushed down and treated with a suitable stabilising solution, such as Sandtex Quick Drying Stabilising Solution before application
• Coverage will vary depending on the texture and porosity of the masonry surface

We recommend trialing a test area before starting your project to check suitability, coverage and colour appearance. Colours may appear different depending on lighting conditions and surface texture, so testing in an inconspicuous area is always best practice. For consistent colour, intermix packs before application if using more than one batch.

For best results, apply in dry conditions when temperatures remain above 10°C during application and drying. Do not apply during rain, frost or in damp conditions. Although shower resistant in as little as 1 hour, longer drying times may be required during cooler or humid weather.

Please Note: This product is not suitable for common, fletton or engineering type bricks.

• Stir thoroughly before use and periodically during application to maintain an even consistency and colour.
• Apply evenly using a good quality masonry brush, long pile exterior roller or suitable airless spray system.
• Apply 2 full coats for a smooth, durable finish with consistent colour and protection.
• Allow approximately 3-4 hours drying time between coats under normal drying conditions.
• Additional coats may be required on highly porous surfaces or when covering darker colours.
• Clean brushes, rollers and equipment with clean water immediately after use.

Regular cleaning and basic maintenance will help keep exterior masonry surfaces looking fresh and protected for longer. Remove dirt, algae and organic growth as it appears using a soft brush and a suitable exterior cleaner to help maintain the appearance of the finish.

Periodically inspect painted surfaces for cracks, damaged areas or signs of weathering, particularly on exposed walls and roughcast surfaces. Repair any defects before touching up with additional coats of Sandtex Microseal Ultra Smooth Masonry Paint to maintain long term protection and appearance.

Can Sandtex Microseal Ultra Smooth Masonry Paint be applied with a spray system?
Yes, Sandtex Microseal Ultra Smooth Masonry Paint can be applied using a good quality masonry brush, long pile exterior roller or suitable airless spray system.

Can Sandtex Ultra Smooth Masonry Paint be used on monocouche render?
Monocouche render can usually be painted to refresh or change its appearance. As surface conditions and formulations can vary, we recommend trialling a test area first to confirm suitability and adhesion.

Can this paint be used on exterior wood?
No, this product is designed for exterior masonry surfaces rather than exterior wood. For exterior timber projects, see Sandtex 10 Year Exterior Multi-Surface Gloss Paint.

Can Sandtex Ultra Smooth Masonry Paint be used on interior brick or block walls?
Yes, it can be used on sound, dry interior brick and breeze block walls, including garages, sheds and utility areas where a durable masonry finish is required.

What does breathable masonry paint mean?
The Microseal coating helps prevent water ingress while allowing trapped moisture within the wall to escape. This helps reduce peeling, blistering and flaking caused by damp and changing weather conditions.

Can Sandtex Ultra Smooth Masonry Paint be used on exterior concrete floors?
No, this product is not designed for foot traffic or vehicle traffic. For exterior concrete floors and walkways, a dedicated floor paint would be recommended.

Why can masonry paint coverage vary?
Coverage will vary depending on the texture, porosity and condition of the surface being painted. Roughcast, porous and heavily weathered masonry surfaces may require additional coats for an even finish.