LAKHTA F-100 — polyurethane injection resin for stopping leaks

LAKHTA F-100 is a two-component hydro-active polyurethane resin free of organic solvents, pumped through packers into water-bearing cracks, joints and voids. On contact with water it starts to react after 10…20 s and within 2…3 min turns into a dense fine-pored foam, increasing in volume up to 30 times. The resin is used to stop active leaks in concrete, reinforced concrete, brick and stone, and to fill voids in water-saturated soil behind tunnel linings. Once the water inflow has stopped, the crack is sealed with LAKHTA R-200 elastic resin.

Specifications

Manufacturer	Rastro (LAKHTA, SLAVYANKA, Izhora) — ZAO “Rastro”, Bolshaya Izhora
Type	injection waterproofing
Use	leak repair, foundations and basements, tunnels and metro, joints and junctions
Base	two-component foaming (hydro-active) polyurethane injection resin of low viscosity, free of organic solvents; components A and B — transparent liquids
Colour	components transparent
Packaging	44 kg kit: component A — 20 kg metal euro bucket, component B — 24 kg euro bucket
Application method	a two-component pump is recommended (a single-component one — by agreement with ZAO “Rastro”); stir the components separately for at least 1 min with a 300 rpm mixer (for a single-component pump — mix A:B 1:1 by volume); for very active leaks, injection beyond the outer contour of the structure is permitted (curtain injection, through holes); caulk large cavities with LAKHTA water plug; inject until the water inflow stops completely, then inject LAKHTA R-200; mechanised only, with an injection pump; packers from Ø10 mm; drill holes at 30…45° intersecting the crack/joint in the middle of the thickness, depth usually 2/3 of the thickness, spacing not more than 1/2 of the thickness (15…30 cm), most often in a staggered pattern; clean the holes with compressed air or water; inject from bottom to top or from right to left; raise the pressure gradually, not above Pmax = 10 atm × concrete class / 3 (for B45 — not more than 150 atm); after polymerisation remove the packers and fill the holes with LAKHTA joint waterproofing or LAKHTA repair compounds; flush the equipment with diesel fuel or motor oil; condition the material at +17…+22 °C for one day beforehand; do not allow moisture to get into the components
Application temperature	not lower than +5 °C (surface and air)
Curing	pot life of the mix at least 60 min (+20 °C); start of reaction with water 10…20 s; end of foaming 2…3 min
Key properties	dynamic viscosity of the mix 200 mPa·s (+20 °C); maximum foaming ratio 30 (when mixed with 7…10 % water, +20 °C); density of the mix 1.1 kg/dm³; ratio A:B 1:1.2 by weight, 1:1 by volume; forms a dense, watertight, rigid-elastic fine-pored foam; works only in the presence of water
Shelf life	12 months from the date of manufacture; in dry rooms at +5…+30 °C in the manufacturer's packaging
Standards	TU 20.16.56-029-11149403-2018

Data from the manufacturer’s technical data sheet. The coating system, number of coats and quantity are selected for your project on request.