EverBuild Caulk Once Flexible Filler White - 295ml

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£0.98 £3.85


Caulk Once is a premium quality acrylic caulk that has been formulated to outperform all other conventional decorating caulks and fillers. Fast-drying and permanently flexible, Caulk Once can be over painted in 1 hour with all paint types or covered over with wallpaper. Caulk Once has been manufactured using an advanced high quality polymer to offer superior adhesion, low shrink as well as tooling down smoothly.

  • A durable, long lasting product that copes with joint movement over time
  • Fast drying and can be overpainted in just 1 hour
  • Remains permanently flexible with excellent slump resistance
  • Apply once and never have to think about it again!
Technical Data & Application


  • Fast drying - can be overpainted in 1 hour.
  • Permanently flexible. • Easy water clean up.
  • Excellent slump resistance. • Conforms to ISO11600 12.5P
  • Certified under the harmonized European standard EN15651 for façade interior and exterior applications in compliance with the Construction Product Regulation

Areas For Use

  • For sealing and filling cracks and gaps prior to decorating.
  • For use around skirting boards, ceiling cornices, window and door frames, stair treads and risings and fixtures adjoining walls.
  • Can be used to fill damaged plaster.


  • Not for use in conjunction with bitumen or asphalt.
  • Do not attempt to abrade when cured.
  • Do not overpaint until a surface skin has formed.
  • Note: this product is a flexible. Certain poor quality paints (especially certain vinyl matts) have very little movement in the dry film. It is possible for the dry paint film to crack if movement is excessive.

Surface Preparation
All surfaces must be clean, dry and dust free. All loose or flaking surface coatings, and old sealant and mastic joints, should be removed before application. Highly porous substrates such as new plaster should first be primed with a dilution of CAULK ONCE with water at a ratio of 1:2. Can be applied to slightly damp surfaces.

Cut the tip of the cartridge taking care not to damage the thread. Apply nozzle and cut cleanly at an angle of 45’ with an opening slightly larger than the gap to be sealed. Apply using a standard sealant gun. Best results will be obtained by keeping an even pressure on the gun trigger and keeping the gun at a constant angle to the surface being sealed. Smooth down within 20 minutes of application using a wetted spatula, piece of wood or wetted finger. Care should be taken at this point not to saturate the surface as this will delay drying. Any excess sealant etc., can be removed using a sponge and warm water. Can be overpainted after @ 1 hour

Curing Times

  • 15 to 60 mins, dependent on thickness, ambient temperature and humidity
  • 3 to 5 days, dependent on thickness, ambient temperature and humidity

Store in cool dry conditions and protect from frost

Shelf Life
36 months from date of manufacture when stored according to manufacturers instructions

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