CLASSIC BONDING LIQUID™ provides good bonding properties with excellent sealing properties for interior and exterior surfaces of concrete, brick, plaster, hardboard and fibre cement.

  • Provides good adhesion for Universal Undercoat over absorbent surfaces;

  • Bonding Liquid is designed to penetrate and bind surfaces previously painted with distemper, lime wash and cement paints before overcoating with Emulsion paints.


Recommended on interior and exterior masonry or plaster to provide a sound base for subsequent coats of emulsion paint.

  • Sealer for porous surfaces such as gypsum plaster, concrete, cement stone, hardboard, paper-faced boards and various other types of composition boarding;

  • Bonding Liquid for penetrating and binding chalked, but sound PVA or lime wash to the original surface for subsequent coats of emulsion paint.


All above technical data, coverage/spreading rate of CLASSIC BONDING LIQUID™ depend on condition and porosity of the surface and the manner in which CLASSIC BONDING LIQUID™ is applied and used. For best results, do not exceed a spreading rate of 12 sq. m. per litre.

  • TYPE  -  Selected blend of penetrating alkyd resins;

  • DRYING TIME  -  Surface: 3 - 4 Hours (23° Celsius and 50% relative humidity);

  • HARD DRY  -  Hard dry: 14 - 16 Hours (at 23° Cesius and 50% relative humidity);

  • OVERCOATING  -  Min. 16 Hours (overnight) at 23° Celsius and 50% relative humidity);

  • VISCOSITY  -  80 - 82 KU;

  • SPECIFIC GRAVITY  -  0.84 - 0.86;

  • FINISH  -  Glossy;

  • WEIGHT SOLIDS  -  34% - 36%;

  • VOLUME SOLIDS  -  26% - 28%;

  • SPREADING RATE  -  14 - 15 m²/litre (to obtain a continuous film without full coverage);

  • COVERAGE (THEORETICAL)  -   5 - 12m²/litre;

  • FLASH POINT  -  Over 21° Celsius;

  • COLOUR RANGE  -  Clear;

  • PACKING SIZE  -  1 Litres and 5 Litres.


  • READY   -  For use with brush. Brush application preferred to ensure adequate penetration;

  • SPRAY  -  For spray application thin with Mineral Turpentine;

  • THINNING  -  Not recommended - Bonding Liquid is supplied ready for use;

  • EQUIPMENT CLEANING  -  Mineral Turpentine.



  • Remove dust, dirt and plaster splashes;

  • Cut out large cracks and imperfections;

  • Fill with a Classic Crack Fix™ and sand smooth when dry;

  • Apply one coat of CLASSIC BONDING LIQUID™;

  • Allow to dry before overcoating.


  • Chalked surfaces must be thoroughly wire brushed and washed down;

  • All loose flaking paint must be removed;

  • Apply one coat of CLASSIC BONDING LIQUID™, allow to dry before overcoating;

  • Surfaces must always be dry before applying CLASSIC BONDING LIQUID™.

NOTE: Bonding Liquid will not penetrate a multiplicity of coats of powder and it is essential to prepare the surface prior to the application of CLASSIC BONDING LIQUID™.


  • Not suitable as a primer for metal surfaces;

  • Not suitable on alkaline surfaces. In these conditions, Classiseal Plaster Primer should be used;

  • When CLASSIC BONDING LIQUID™ is dry, there should be little or no gloss. A glossy surface indicates that CLASSIC BONDING LIQUID™ has been applied too liberally;

  • Conversely, a loose or powdery surface after application of CLASSIC BONDING LIQUID™ indicates that it has been applied too sparingly and a further application is required;

  • Do not use Lacquer Thinner or Methylated Spirits for diluting as this will alter or destroy the quality and performance of CLASSIC BONDING LIQUID™;

  • Clean all equipment and tools with Mineral Turpentine after use.


  • 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.


26/05/2022 - 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.

Download as Pdf Document