Lamella Impact Packer 18mm

Plastic lamella drive-in injection packer (18 × 120 mm) with flat-head nipple and cross-slider valve. Designed for veil and curtain injection of gels, resins, and microemulsions to seal ground-contact structures such as cellars, tunnels, and channels. Includes a gel-pipe holder for direct connection of 10 mm gel injection pipes.

Key Features

Drive-in installation — hammered into pre-drilled 18 mm hole, no spanner required
Flexible plastic lamellae grip the borehole wall on insertion
Flat-head nipple (16 mm) — low profile, accepts standard quick-connect couplings
Cross-slider valve for clean opening and closing — no dripping between injections
Includes gel-pipe holder with M15 × 1.5 thread for direct connection of 10 mm gel injection pipes
Designed for gels, resins, and microemulsions
Ideal for veil / curtain injection behind walls and slabs
Lightweight, single-piece plastic body — no metal parts to corrode
European market standard

Technical Specifications

Material	Engineering plastic with flexible barbed lamellae
Type	Drive-In (Impact) Injection Packer — Veil / Curtain Injection
Head Nipple	Flat head, 16 mm diameter
Valve System	Cross-slider (slide-open / slide-close, no dripping)
Cross Slider Passage	4 mm
Length	120 mm
Diameter	18 mm
Recommended Drill Bit	18 mm SDS
Gel Pipe Holder	M15 × 1.5 threaded clamping for 10 mm gel pipe
Compatible Resins	Acrylic gel, Polyurethane resin, Cement microemulsion, Silicate gel
Installation Tool	Hammer or rubber mallet (with impact aid)
Standard	European market (DIN/EN)

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Product Description

The Lamella Impact Packer 18mm is the larger-diameter member of the lamella drive-in packer family. Like the 14 mm version, it is driven into a pre-drilled hole with a hammer — flexible barbed lamellae running along the body compress against the borehole wall on insertion and lock the packer into the substrate with no mechanical tightening required.

What distinguishes the 18 mm version is the purpose it was engineered for: veil (curtain) injection of gels, resins, and microemulsions behind ground-contact concrete structures. The combination of larger 18 mm diameter, cross-slider valve, flat-head nipple, and integrated M15 × 1.5 gel-pipe holder makes this the right packer when the job is not simple crack injection through a wall, but rather subsequent post-construction sealing of an existing structure that is already taking on ground water through its earth-facing face.

In a curtain-injection workflow, packers are installed in a grid pattern from the dry side of the structure (the basement interior, the tunnel inside) and gel or microemulsion is injected through them — passing right through the concrete and forming a continuous waterproofing curtain in the soil immediately behind the structure. The curtain becomes the new permanent seal between the structure and the surrounding groundwater.

Why a Different Packer for Veil / Curtain Injection?

Curtain injection has different equipment needs from ordinary crack injection, and the 18 mm packer is built around those needs:

Requirement	How the 18 mm packer addresses it
High injection volumes — curtain injection moves litres, not millilitres, of gel through every packer	Larger 18 mm body and matching drill hole provide much higher flow capacity than 14 mm packers
Gel injection — acrylate and silicate gels are injected through dedicated 10 mm gel pipes, not standard injection guns	Integrated M15 × 1.5 gel-pipe holder clamps onto a standard 10 mm gel pipe directly on the packer head
Multiple sequential injections at the same packer	Cross-slider valve opens and closes with a clean slide — no dripping between injections, no risk of resin curing inside the packer
Long curtain runs — packers must accept resin returning from neighbouring packers in the grid	Generous 4 mm cross-slider passage handles the higher flow rates
Flush surface finish after injection	Flat 16 mm head nipple sits low against the substrate; easy to skim or plaster over once the cross slider is closed

For ordinary crack injection on a single crack line, the 14 mm version is the right choice — smaller drill hole, less substrate damage, and the non-return-valve variant is well suited to that workflow. The 18 mm version is the right choice when the job is a grid of packers feeding a continuous gel curtain behind the structure.

Characteristics and Advantages

Drive-in installation — hammered into the 18 mm drill hole with an impact aid; the lamellae do all the sealing work, no tightening or curing time
Cross-slider valve — slide-open to inject, slide-close to stop. No dripping between injections, no resin curing inside the valve body, no need to disconnect-and-reconnect between rounds in a sequential injection
Flat-head 16 mm nipple — accepts standard quick-connect injection couplings; low profile makes for a clean surface finish after curing
Integrated gel-pipe holder — the M15 × 1.5 threaded clamping fitting accepts a 10 mm gel injection pipe directly, eliminating the need for adapters between the packer and the gel pump
Larger body, higher flow — the 18 mm diameter and 120 mm length give significantly more internal volume than the 14 mm packer, important for the high flow rates of gel and microemulsion injection
All-plastic construction — no corrosion in the wet, chemically aggressive environment behind a ground-contact wall
Compatible with the full range of veil-injection resins — acrylic gels, silicate gels, polyurethane resins, and cement microemulsions

Application Instructions (Veil / Curtain Injection)

Lay out the grid pattern on the dry side of the wall or slab. Curtain injection typically uses a diagonal grid with packers spaced 200–500 mm apart, depending on the resin type and the thickness of the substrate. The resin supplier will specify the spacing.
Drill the holes with an 18 mm SDS bit, angled inward at 30–45° so the bottom of the hole reaches through the substrate into the soil beyond. This is critical — the gel must exit on the earth side of the wall to form the curtain.
Vacuum or blow out the drill holes thoroughly. Soil and concrete dust will block the cross-slider valve if not removed.
Insert the packer by hand until the first lamella enters the hole.
Drive the packer home with a hammer and impact aid until it sits flush with the substrate surface. Confirm the cross-slider is in the closed position before proceeding.
Connect the gel pump to the packer:
- For gel injection: Screw the gel pipe into the M15 × 1.5 gel-pipe holder. The packer is now ready to receive gel directly from the gel pipe distributor.
- For resin or microemulsion injection: Connect a standard quick-connect coupling to the flat-head nipple.
Open the cross slider by sliding it across to the open position. The packer is now flowing.
Inject the gel, resin, or microemulsion at the working pressure specified by the resin manufacturer. Watch for gel return at adjacent packers — this confirms the curtain is forming.
Close the cross slider when the packer has accepted its specified dose. The slider stops the flow cleanly; there will be no dripping.
Move to the next packer in the grid and repeat. Because the cross slider closes cleanly, you can leave previously injected packers in place without back-flow or curing inside the body.
Allow the curtain to cure as specified for the resin type — typically 4–24 hours for acrylic gels, longer for polyurethane.
Re-injection (if required) — for acrylic gel curtains, the same packer can be re-opened and re-injected at a later date by sliding the cross slider open and connecting the gel pipe again. This is one of the key reasons curtain-injection systems are preferred for long-life waterproofing.

Applications

Veil / curtain injection behind cellar and basement walls — Post-construction waterproofing of existing structures taking on ground water
Tunnel curtain injection — Sealing segmental or shotcrete tunnel linings from the inside via curtain injection through the lining into the surrounding ground
Shaft, channel, and pit waterproofing — Buried structures where re-excavation from the outside is impossible
Subsequent sealing of ground-contact slabs — Underside leaks in basement slabs sealed by injection through the slab into the underlying soil
Soil consolidation and ground-water cut-off — Microemulsion injection to stabilise loose soils or create a hydraulic cut-off in granular ground
Gel injection through embedded gel pipes — The M15 × 1.5 pipe holder lets the packer act as a surface termination for embedded 10 mm gel pipes in re-injectable curtain systems