AQUAFIN-i380: injection cream for retrospective horizontal barriers
Injecting a horizontal barrier membrane without pressure, retrospectively – with AQUAFIN-i380 that is not a problem. The new injection cream from SCHOMBURG is suitable for producing retrospectively applied horizontal barrier membranes in accordance with WTA data sheet 4-4-04/D against rising damp up to 95% moisture saturation in masonry work e.g. brick, clinker, lime-sand block, natural stone and including joint mortar.
AQUAFIN-i380 is a secure solution for retrospective horizontal barrier membranes. The silane-based injection cream is applied without pressure and acts against rising damp in masonry work. As a rule, classical silification solutions only work up to 60% moisture saturation when applied without pressure. The injection cream from the East Westphalian building product specialist achieves full functionality at a saturation level of 95% even without pressure application.
The active ingredient is very finely absorbed via special manufacturing and does not react with the water but exclusively with the substrate. The active ingredient is extremely hydrophilic, i.e. it loves water, so that it rapidly disperses in the water present in the substrate. Over time, this leads to 100% saturation of the pores. A so-called self injection occurs. Following the reaction with the substrate, the capillary walls become water repellent, which prevents absorption and rising damp so the substrate dries out.
Remove old damaged render, paints or coatings from the substrate up to a height of 80 cm above the neighbouring area of damage either visibly or through examination. Rake out crumbly pointing to a depth of 2 cm deep and mechanically clean the area.
The distance between bore holes as well as their positioning (single or double row) is determined by the absorption of the masonry work. The closer the bore holes are together, the greater the degree of success. Electro-pneumatic drills, which operate as free from vibration as possible, are suitable for boring the holes. As a rule, 12 mm diameter holes or greater are drilled at 10.0 cm to 12.5 cm spacings (axis-to-axis) and at an inclined angle above 0° and up to 45° measured to the horizontal plane. The depth of the holes should be approx. 5 cm shorter than the masonry work thickness. Ensure that the positioning of the bore holes penetrates at least one horizontal masonry joint (or two for thicker masonry works). With substrates of low or no absorption it is recommended that the bore holes are positioned on two levels within the joints. The height difference being less than 8 cm. Thoroughly remove dust or debris resulting from the drilling before commencing with the injection works. This is to ensure the greatest uptake of the active ingredients into the masonry works. Injection must be carried out with a suitable handoperated barrel gun with an appropriate attachment. Slowly squeeze AQUAFIN-i380 out into the bottom of the bore hole – whilst gradually moving the injection tube out to ensure the bore holes are completely filled. Plug the bore hole openings with ASOCRET-BM.