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Building renovation system


Injections  provide comprehensive building protection against water when horizontal insulation is absent or ineffective.

We offer two products: an injection cream (Ceresit CR 82) and a dual-purpose injection fluid (Ceresit CO 81) to optimally address specific needs. The range of injection products includes a mineral smooth consistency, shrinkage-free mortar (Ceresit CR 65) for filling injection holes and voids in masonry. Additional options include a bitumen waterproofing agent, a self-adhesive membrane, and a solvent-free coating insulation.

Injections work

During injection work, precise hole preparation is essential. Use drills dedicated to specific materials and a template to prevent axial deviations, minimizing the risk of insulation gaps (discontinuity). Discontinuity area increases with the angle of hole axis deviation.

Ceresit Renovation System Injections graph 01 mobile

Discontinuity of secondary horizontal masonry membrane caused by a failure to maintain paralell injection holes

Prepare for injection work by cleaning the masonry surface and removing damaged plaster up to at least 80 cm above the damp or saline zone. Mark injection hole locations for drilling, ensuring holes end 5–7 cm away from the masonry's edge. It is recommended to make a control drill to verify its the actual thickness before proceeding.

When drilling injection holes, ensure they pass through at least one horizontal joint. For thick masonry (over 60 cm), it's advisable to go through two joints. Use pneumatic or low-impact core drills that cause as little shock as possible. Walls exceeding 100 cm in thickness should be drilled from both sides. Adjust the drilling depth to ensure injection holes overlap at a distance of at least 10 cm. Be especially cautious when planning holes in wall corners and nodes.

Injecting masonry with moisture content above 20% or with voids

In such scenarios, CR 82 injection cream is highly effective. It is suitable for masonry with cracks and/or voids, eliminating the need for prefilling voids with mineral mortar. Note that CR 82 injection cream spreads much better in masonry with a significant degree of dampness; its effectiveness in partitions with low moisture may be limited. In this case, it is recommended to prefill injection holes with water. CR 82, a silane-based injection cream designed for horizontal membranes, has an active ingredient content of around 80%, which makes it suitable for use in partitions with moisture levels of up to 95%.

Application of the material is simple and does not require specialized equipment. Adjust the drilling depth, ensuring the hole ends 3 cm before the masonry's edge. Maintain injection holes at axial intervals of up to 15 cm, arranged in one or two rows, spaced approximately 10 cm apart. In case of a double-row injection, offset the second row by half the distance between the holes. Keep the diameter of the holes between 12 and 18 mm. Drill in the joints horizontally or with a slight inclination. If a hole is not in a joint, make sure it intersects at least one horizontal joint. Use pneumatic drills or core drills to minimize shock during drilling.

Step by step

Ceresit Renovation System Injections step 1

Drilling holes

Ceresit Renovation System Injections step 2

Control of depth and angles during drilling

Ceresit Renovation System Injections step 3

Application of CR 82 injection cream using a garden sprayer


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