Technical Reference
Treatment Procedures.
Step-by-step waterproofing, structural repair and rehabilitation methods, grouped by the chemistry they use, each mapped to the Armstrong products that carry it out. Select a treatment to view the full procedure and product recommendations.
Treatment · Joint, crack & leak sealing
Masonry Crack Treatment
Acrylic latex sealing for masonry wall cracks
Applications
Masonry wall cracksPlaster cracksTile and pipe jointsBrick-to-beam junctions
Procedure
- Prepare the surface thoroughly.
- Open the crack to a U-groove at least 6 mm wide and deep.
- Where the crack is deep, fill the groove to half depth with a polymer cement putty of ROOFCRETE AR 576 or ROOFBOND SBR 401 with cement and fine sand at 1:1:1.
- Seal the groove with WONDERSEAL XL acrylic latex sealant.
- Paint over once cured.
Important Suggestions
For hollow, shrinkage or wide dead cracks, treat both faces and add injection grouting for complete sealing.
Why This Treatment?
Masonry walls move with weather. A cement filler cracks again, while acrylic latex sealant stays elastic and paintable, backed by a polymer cement putty for strength.
Recommended Products
Dosage & Coverage
WONDERSEAL XLDepends on crack width and depth
ROOFCRETE AR 576500 ml to 2 litres per 50 kg cement
Related Solution Guides
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