The Superior Quality, Alkali Resistant Pigmented Emulsion Sealer and Excellent Multi Surface Primer on Suitably Prepared smooth cement, plaster, porous brick surfaces, wood, composition boards, galvanised iron and PVC. Alkali resistance combined with high penetration and adhesion power make CLASSISEAL MULTI-PURPOSE PRIMER™ the unique sealer for the subsequent application of high quality emulsion paints.

  • Touch dry 1 hour @ 25° Celsius. Recoat 4-6 hours;

  • Theoretical spreading rate 6-8m²/litre.


CLASSISEAL MULTI-PURPOSE PRIMER™ can be used on interior and exterior surfaces. Recommended for sealing new alkaline surfaces such as fibre cement and plaster and is outstanding for crete stone and surfaces that are highly absorbent such as gypsum board and rhino board are successfully sealed with CLASSISEAL MULTI-PURPOSE PRIMER™ for subsequent coats of high quality emulsion paints.


  • TYPE  -  Acrylic Copolymer/oleoresinous combination resin;

  • DRYING TIME  -  Surface: 1/2 - 1 hour (23° Celsius and 50% Relative Humidity);

  • HARD DRY  -  5 - 8 hours (at 25° Celsius and 50% Relative Humidity);

  • OVERCOATING  -  4 Hours;

  • VISCOSITY  -  98 - 101 KU;

  • SPECIFIC GRAVITY  -  1.38 - 1.40;

  • FINISH  -  Matt;

  • WEIGHT SOLIDS  -  52 - 54%;

  • VOLUME SOLIDS  -  32 - 34% (100u wet film will give 33u dry film);

  • SPREADING RATE  -  10 - 11m²/litre (to obtain a continuous film without full coverage;

  • COVERAGE (THEORETICAL)  -  6 - 8m²/litre;

  • FLASH POINT  -  Not applicable;

  • COLOUR RANGE  -  Off White only;

  • PACKING SIZE  -  1 Litres, 5 Litres and 20 Litres.

All above technical data are based on CLASSISEAL MULTI-PURPOSE PRIMER™ off White. Coverage/spreading rate of colours depend on condition and porosity of the surface and the manner in which CLASSISEAL MULTI-PURPOSE PRIMER™ is applied and used. For best results, do not exceed a spreading rate of 8m² per litre.


  • READY   -  Brush application is preferred to obtain maximum penetration;

  • SPRAY  -   Application is not recommended;

  • THINNING  -  Not recommended;



  • NEW SURFACES: Remove dust, dirt and plaster splashes;

  • Plaster and Cement: Cut out large cracks and imperfections;

  • Fibre Cement: Fill with a recommended Crack Filler and sand smooth;

  • Gypsum-combination board: Apply when dry only. Apply one coat of CLASSISEAL MULTI-PURPOSE PRIMER™; Depending on condition and porosity of surface, a second coat of CLASSISEAL MULTI-PURPOSE PRIMER™ may be required before overcoating with 2 coats of high quality emulsion paint;

  • RE-DECORATION: Remove completely by scraping, wire brushing, hydro blasting to PVA, Emulsion Paint, bare sound surface;

  • Lime Wash, Distemper: Stop and fill all large cracks and imperfections with a recommended in poor condition Crack Filler and sand smooth when dry; Apply one coat or two coats of CLASSISEAL MULTI-PURPOSE PRIMER™ depending on the condition and porosity of the surface.

NOTE: CLASSISEAL MULTI-PURPOSE PRIMER™ will not penetrate multiple coats of lime wash, distemper or cement paints - Overcoat with two coats of CLASSISEAL MULTI-PURPOSE PRIMER™.


Do not apply direct to metal surfaces. Do not dilute with water as CLASSISEAL MULTI-PURPOSE PRIMER™ will loose its binding power on porous surfaces.


  • The ambient temperature must be between 5ºC and 35ºC and humidity between 10% and 85%;

  • Do not paint too early as the wall may still be damp - paint only when the walls are dry;

  • Do not paint in too hot weather, rather paint early morning and after lunch, the slower the paint dries, the longer it lasts;

  • Excessive application thickness and/or rapid drying could lead to cracking;

  • Avoid applying under adverse weather conditions as this could result in poor product performance;

  • Excessively friable surfaces should be cleaned down prior to primer application.


Painting is a relatively user-friendly activity if the proper precautions are taken to ensure safety

  • Always keep out of reach of children and animals;

  • Do not take in orally - harmful if swallowed. Seek medical attention and do not induce vomiting;

  • If accidental contact with skin, wash immediately with soap and water or a good quality skin cleaner;

  • If accidental contact with eyes, rinse immediately with plenty of water and seek medical advice;

  • Do not let a freshly painted room be occupied, particularly not by older people, children, or pets;

  • Wear a respirator if the area being painted cannot be adequately ventilated, and work for short periods only;

  • Ventilate the area to be painted, opening all doors and windows and using fans during application and drying;

  • Protect floors with cloth dropcloths, not plastic, which is far more slippery;

  • Do not paint or store paint near any heat source such as a water heater or fireplace, and never smoke while painting;

  • Make sure your ladder is in good shape. Set the legs on an even surface and lock the cross braces. Do not stand on the top of the ladder nor on the utility shelf. If you are having difficulty reaching a spot, get down from the ladder and move it rather than leaning out;

  • Clean up carefully and thoroughly when you are done for the day;

  • If rags have alkyd paint or thinner on them, leave them to dry outside to avoid any chance of spontaneous combustion;

  • Choose an area inaccessible to children and pets, and when they are thoroughly dry, take them to a toxic-waste dump site.


Different surfaces and environmental conditions require specific painting systems to produce the best possible results - It is, therefore, recommended that you contact a representative from Classic Paints for advice on all your painting requirements, whenever possible.

The information, and, in particular, the recommendations relating to the application and end-use of Classic Paints products, are given in good faith based on Classic Paints’ current knowledge and experience of the products when properly stored, handled and applied under normal conditions. In practice, the differences in materials, substrates and actual site conditions are such that no warranty in respect of merchantability or of fitness for a particular purpose, nor any liability arising out of any legal relationship whatsoever, can be inferred either from this information, or from any written recommendations, or from any other advice offered. The proprietary rights of third parties must be observed. All orders are accepted subject to our current terms of sale and delivery. Users must always refer to the most recent issue of the Product Data Sheet for the product concerned, copies of which will be supplied on request.


No guarantee is implied by the recommendations contained herein since conditions of use, method of application and cleanliness of the substrate prior to painting are beyond our control.


20/05/2022 - This supercedes all previous publications - This technical data furnished is obtained from controlled laboratory tests under ideal application conditions. No guarantee of any performance characteristic is given or implied and we do not hold ourselves responsible for any consequential damage of whatsoever nature that may arise from use of our products. In the event of a proven product fault our liability will be limited to the replacement of the product only. It is the users responsibility to confirm the currency of product data sheets.

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