Download PDF<\/a><\/span><\/li>\n<\/ul>\nThe brush-grade compound is suitable for fine, hairline or thread-width cracks in interior and exterior walls and ceilings. Sealing fine cracks helps restrict wind and moisture ingress. In A+ energy-rated buildings, product suitability must be assessed as part of the complete airtightness solution.<\/p>\n
Preparation for both application methods<\/h3>\n
Surfaces must be clean and free from materials that impair adhesion. Allow new concrete to cure for 30 days. The user is responsible for proper substrate preparation and checking product suitability for the specific surface.<\/p>\n
Brush-grade compound<\/h3>\n\n- Apply to fine, hairline or thread-width cracks with a brush or filling knife. For a smoother finish, tool along the full length of the crack with a filling knife, keeping the crack centred beneath the blade.<\/li>\n
- Spread a thin layer approximately 5 cm either side of the centre of the crack. This wider elastomeric layer acts as a patch and distributes stresses more effectively.<\/li>\n<\/ol>\n
Knife-grade compound: cracks up to 0.8 mm<\/h3>\n\n- Apply a wet layer up to 1.5 mm thick using a filling knife or trowel.<\/li>\n
- Spread the compound approximately 5 cm either side of the centre of the crack. Feather the edges into the surface to form a wider elastomeric patch.<\/li>\n<\/ol>\n
Knife-grade compound: cracks wider than 0.8 mm<\/h3>\n\n- Mechanically widen the crack to approximately 6 mm wide and 6 mm deep.<\/li>\n
- Fill the crack and leave a slightly raised layer above it to compensate for shrinkage as the compound dries.<\/li>\n
- Allow to dry for at least 4 hours. Apply an additional layer approximately 1.5 mm thick, extending approximately 5 cm either side of the centre of the crack and feathering the edges. This creates a wider elastomeric patch with greater resistance to stress.<\/li>\n<\/ol>","protected":false},"excerpt":{"rendered":"