The “Ultra” version is mixed with cold water from +5 to +20 °C and sets almost instantly even when the inflowing water is cold. At +20 °C setting starts after 30 s and ends after 1 min, at +5 °C after 30 s and 1.5 min. In water the compound reaches 7.0 MPa in an hour and 35.0 MPa in 28 days, and after a day it withstands a pressure of 1.0 MPa, which corresponds to W10. After the leak is stopped, the remaining volume of the hole is filled with LAKHTA joint waterproofing.
| Manufacturer | Rastro (LAKHTA, SLAVYANKA, Izhora) — ZAO “Rastro”, Bolshaya Izhora |
|---|---|
| Type | hydraulic plugs |
| Use | leak repair, foundations and basements, joints and junctions, tunnels and metro |
| Base | non-shrink rapid-hardening one-component cement compound (dry mix): Portland cement, quartz filler, active chemical additives; for mixing with cold water |
| Colour | grey dry mix |
| Packaging | plastic buckets of 5 and 10 kg with sealed lids |
| Application method | chase out cracks, butt joints and holes to a depth of at least 60 mm and a width of at least 20 mm (“dovetail”), clean; mix with water at +5…+20 °C as per the label, knead by hand for no more than 30 s; prepare a portion to be used within 1 min; press into the hole and hold until the leak stops (at least 1 min); the plug fills half the depth, fill the rest with LAKHTA joint waterproofing |
| Application temperature | +5…+35 °C (surface and ambient); mixing water from +5 °C to +20 °C |
| Curing | at +20 °C: initial set 30 s, final set 1 min; at +5 °C: 30 s and 1.5 min; no special curing required |
| Key properties | maximum aggregate size 0.63 mm; compressive strength when cured in water: 1 h — 7.0 MPa, 1 day — 11.0 MPa, 28 days — 35.0 MPa; bond strength to the substrate: 1 h — 0.2 MPa, 28 days — 2.0 MPa; after 1 day withstands water pressure of 1.0 MPa (W10); corrosion resistance pH 4…13; service up to +250 °C; non-shrink; hazard class 4 |
| Consumption | 1.7 kg/dm³ |
| Shelf life | 12 months from the date of packing; in dry rooms in the manufacturer's packaging; at temperatures above +30 °C protect from direct sunlight |
| Standards | TU 5775-006-11149403-2001 |
Data from the manufacturer’s technical data sheet. The coating system, number of coats and quantity are selected for your project on request.
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