Repairing Cracks in Plaster

Key Takeaways: 

  • Use paintable fillers to achieve a smooth, flawless finish when repairing plaster cracks.
  • Choose the right drying time, Quick Dry for speed, Light Speed for precision and a sandable result.
  • The Pro Gaps range delivers excellent adhesion, minimal shrinkage, and seamless paint compatibility.
  • Designed for small surface cracks, dents, and imperfections in walls and ceilings, ensuring a durable, professional look. 

Repairing Cracks in Plaster:

Filling light cracks in plasterwork is a key step in achieving a clean, even surface before painting. For these types of repairs, paintability and flexibility are essential. Soudal’s Pro Gaps range is purpose-built for this task, ensuring a professional finish every time. 

Pro Gaps Fill & Paint is the go-to multipurpose filler for general crack and gap repair, offering smooth application and excellent paint adhesion. When speed matters, Pro Gaps Quick Dry is immediately paintable with gloss, semi-gloss, and low sheen paint. Flat and ceiling paints can be painted after only 10 minutes. Due to its unique composition, it minimises the risk for mud cracking or paint crazing, even with difficult highly filled and covering paints. 

For a superior, sandable result, Pro Gaps Light Speed is light weight suitable for detailed work. 

Each product is formulated for professional results, delivering easy application, quick drying, and long-lasting flexibility, perfect for interior repairs where precision matters. 

International Standard Tests:

There is an ISO (international standard) test for assessing staining on natural stone: 

  • ISO 16938-1 – the critical test with compression.
  • ISO 16938-2 – the same test without compression. 

If a sealant passes ISO 16938-1, it can be classed as non-staining on specific stone types. Soudal has tested several sealants on Carrara marble and Belgian Blue stone, confirming that they meet the required standards. Products intended for use with natural stone are noted in their Technical Data Sheets as: 

“Tested according to ISO 16938-1 (Testing for staining on natural stone by sealants).” 

FAQs

Which Pro Gaps product is best for quick touch-ups?

Pro Gaps Quick Dry is immediately paintable with gloss, semi-gloss, and low sheen paint. Flat and ceiling paints can be painted after only 10 minutes. Due to its unique composition, it minimises the risk for mud cracking or paint crazing, even with difficult highly filled and covering paints.

Can I sand Pro Gaps Light Speed?

Yes, it cures by evaporation of moisture content and can be easily sanded for a smooth, seamless finish.

Are these fillers suitable for large cracks?

For deeper cracks, it’s best to apply in layers to ensure proper curing and adhesion.

Do they work on ceilings as well as walls?

Absolutely! All Pro Gaps products can be used on both walls and ceilings for a consistent finish. Just keep in mind that thicker applications may require a longer curing time before painting, so the paint adheres properly and the finish stays smooth.