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Anti-Mould Paints

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Rust-Oleum White Masonry Sealer 8399 is a fast drying, non-yellowing sealer. The product is based on a vinyl acrylic polymer.

Recommended Uses

Rust-Oleum White Masonry Sealer 8399 should be used on mineral substrates like concrete, brick and plastered walls, masonry and mineral fibre board. Intended for brush, roller and spray application and should be recoated with Rust-Oleum 8300 Topcoat(s).
Rust-Oleum 8399 Sealer can be applied on cleaned, sound mineral substrates and sound well prepared previous coatings; porous substrates should be primed with diluted Rust-Oleum
8399 Sealer

Rust-Oleum 8399 Sealer is classified Class 1 Surface Spread of Flame according to BS 476; part 7 : 1987.


Theoretical: 12.4 m²/l at 35 μm dry
Practical: Practical coverage depends on many factors such as porosity and roughness of the substrate and material losses during application.

Surface Preparation

New concrete, plastered or brick surfaces should cure and dry for at least 30 days prior to the application of coatings. Remove grease, oil and all other surface contaminations by using Alkaline ND14 Cleaner/Degreaser or high pressure (steam) cleaning. Wash total surface with plenty of fresh/warm water or high pressure (steam) cleaning in order to remove all remnants of contamination and cleaners. Sand previous coatings, which are in good condition to remove gloss and to roughen the surface slightly. Remove non-adhering old coatings. The surface must be clean and dry during application.


Please read data sheets carefully prior to application.

Please note that delivery lead times for this item may vary. Please feel free to contact the office on 01934 825850 for a confirmed delivery date prior to ordering.

8399 Mould Resistant Solvent Based Primer

Solvent based sealer to be applied prior to the use of Mould resistant paint 8300


Please select a colour to see size/pack options:


Please note that the colour swatches above are representative only. This product's actual colour may differ. For further details please contact us.



Price: £80.05

£96.06 incl VAT

Disclaimer: All products purchased via this website must be used in conjunction with the product data information provided.
Roadcraft Safety Products Ltd cannnot be held responsible for any performance failures where mixing or application instructions have not been adhered to.