Alcolin Crackfiller – Exterior 500g


In stock



Alcolin Outdoor Crackfiller.

Designed with non-slag properties which give it excellent consistency for weatherproofing, mending, sealing and filling cracks and gaps. It has excellent workability and water-resistant properties. It is specially designed to be compatible with wider than average cracks.


  • Mends cracks, gaps and cavities of up to 10mm on an upright concrete surface. Can also be used for renovating stone and cement surfaces or masonry block surfaces.

  • Perfect for outdoor use.


  • Smooth and even finish.

  • Designed with low shrinkage properties.

  • Excellent non-sag and anti-slump characteristics.

  • Superb workability.

  • Highly waterproof

  • Outstanding properties to accommodate painting and sanding.

  • Perfect for weatherproofing.

  • Can be used for indoor and outdoor projects.


  • Product Type: Construction

  • Brand: Alcolin

  • Moisture resistance: Good


  • Optimum gap width: 2-10 mm

  • Setting time: Approximately 24 hours.


  • 1 x Alcolin Crackfiller Exterior


Priming and bonding

  • Gypsum surfaces or friable and chalking surfaces, as well as wide cracks, should be primed with Alcolin Permobond.

  • For narrow cracks dampen the area with water.

Surface preparation

  • Ensure that surfaces are clean, dry and dust and dirt free.

  • Smooth the crack with a utility knife or something similar so that there are no jagged edges. Utility knives are for sale at FarmAbility.

  • Paint over any rusted nail heads.

Mixing instructions

  • Mix 3 parts of the Crackfiller with 1-part water.

  • Mix until a lump-free paste has formed.

  • Let the mix settle for 5 minutes.

  • Stir the contents again before use.

  • Do not mix more Crackfiller than can be used in one hour.

Application or directions for use

  • Apply and work the Crackfiller into the crack with a putty knife or trowel. Putty knives can be found here.

  • Fill the crack completely and slightly above the surface level.

  • Smooth off the excess Crackfiller with your putty knife. Clean the putty knife throughout the application with a damp cloth.

  • For cracks deeper than 10 mm you should apply different layers allowing each layer to dry before applying the next one.

  • The repaired crack must dry for 24 hours before sanding or painting over it can be done.

  • Protect the crack from direct sunlight and harsh weather elements for the first 24 hours of curing.


  • Clean mixing and application tools immediately after use with water.


  • Store in a dry place out of direct sunlight in the original container.

  • Keep the container tightly sealed.

  • Keep out of reach of children and pets.


  • If stored correctly the product has a shelf life of approximately 9 months.


  • Avoid direct skin contact or eye contact. In the event of contact rinse thoroughly with clean cold water. Seek medical attention if irritation persists.

  • Do not ingest the product. In the case of ingestion, seek medical attention immediately. Do not induce vomiting.

  • Allow any unused product to dry before disposing of the container.


  • Should not be used to renovate structural instability like foundation movements.

  • The product dries too fast to be effective for mending small indentations or imperfections.

  • Not recommended for use as skimming plaster.

  • Should not be used on flexible surfaces.


The above information is only offered, as a guide to the use of this product. Furthermore, users should satisfy themselves that it is suitable for their needs. Since we have no control over the conditions under which it is used, we cannot accept responsibility for problems caused by the use and/or application of this product.


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