Steel Wedge Packer

Compact steel wedge packer with a screwed-in steel M5 cone nipple and integrated check valve. Driven directly into the crack — no drilling required. Suitable for crack injection in concrete, granite, hollow block, brick, sandstone, and wood. Rated for injection pressures up to 50 bar.

Key Features

Driven directly into the crack — no drilling into the substrate required
Solid steel body with screwed-in steel M5 cone nipple (DIN 71412)
Integrated check valve prevents resin back-flow
Rated for injection pressures up to 50 bar with a tight wedge fit
Suitable for substrates that cannot be drilled — natural stone, masonry, wood
Removable after injection — packer is recovered, not consumed
European market standard, M5 thread (DIN 71412)

Technical Specifications

Material	Solid steel body with steel M5 cone nipple (DIN 71412)
Type	Drive-In Wedge Injection Packer
Connection	M5 cone nipple with integrated check valve
Length	25 mm
Internal Thread	M5 DIN 71412
Minimum Crack Width	1.5 mm
Maximum Injection Pressure	50 bar (with tight wedge fit)
Compatible Resins	Epoxy resin, Polyurethane resin, Micro cement suspension, Wood preservatives
Installation Method	Driven directly into the crack with a hammer
Removable	Yes — packer is extracted after injection

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Product Description

The Steel Wedge Packer is a compact, solid-steel injection packer that is driven directly into the crack rather than installed in a drilled hole. A screwed-in steel M5 cone nipple (DIN 71412) with an integrated check valve provides the injection connection.

This drives-into-the-crack design is the defining advantage: it eliminates the entire drilling step from the workflow, and — critically — it enables crack injection in substrates that cannot be drilled. Natural stone (granite, sandstone), hollow brick or block, fragile heritage masonry, and even wood are all amenable to wedge-packer injection because the packer enters through the existing crack, not through a new bore hole that could damage the substrate.

The steel construction supports injection pressures up to 50 bar when the wedge is driven tightly into a crack of at least 1.5 mm width — substantially higher than plastic wedge packers can sustain.

Why a Wedge Packer Instead of a Drill Packer?

Drill packers require a clean, intact substrate that can accept a 10–14 mm drill hole without damage. Many substrates do not:

Substrate Issue	Wedge-Packer Advantage
Hollow brick / block — drill bit punches into the cavity	Wedge enters via the existing crack on the surface
Natural stone — drilling risks splitting, especially in granite, sandstone, limestone	No new drill hole means no new split
Heritage / listed building — drill marks are visually unacceptable	Crack is repaired without leaving any visible drill traces
Pre-stressed / post-tensioned concrete — drilling risks hitting tendons	Crack-line installation has no risk of contacting reinforcement
Wood consolidation — drilling cracks the timber further	Wedge drives directly into the timber crack
Thin elements — drilling can perforate through to the other side	No drilling required

This is also the fastest workflow for crack repair when the crack is already wide enough (≥1.5 mm) to accept the wedge — no drilling, no vacuuming dust, no tightening, just hammer, inject, remove.

Characteristics and Advantages

No-drill installation — wedge is driven directly into the existing crack with a hammer; no drilling required
50 bar pressure rating — solid steel body sustains high injection pressures when the wedge is tightly seated
Integrated check valve — built into the M5 cone nipple; resin cannot flow back out after the gun is disconnected
Recoverable — after the resin cures, the packer is extracted from the crack and reused on the next job. There is no consumable cost per packer (only the resin).
Universal substrate compatibility — works in concrete, granite, hollow block, brick, sandstone, masonry, and wood
Wood-consolidation capable — the same packer is approved for pressure impregnation of wood preservatives and epoxy-resin wood consolidation
European market standard — M5 thread per DIN 71412, compatible with every M5 injection coupling and check-valve hose

Application Instructions

Identify the crack and measure its width. The minimum crack width for the steel wedge packer is 1.5 mm.
Clean the crack of loose material and dust with a wire brush and compressed air. The wedge cannot seal against loose debris.
Position the wedge packer at the injection point along the crack — typically every 100–200 mm depending on crack width and substrate.
Drive the wedge into the crack with a hammer, using a protective punch on the M5 nipple to avoid damaging the threads. Stop driving when the wedge feels firmly seated and resistance increases sharply.
Connect the injection gun to the M5 cone nipple.
Inject the resin at the working pressure for the resin and substrate (up to a maximum of 50 bar) until resin returns from the next packer along the crack.
Close the adjacent packer’s check valve and move along the crack.
Disconnect the gun — the integrated check valve in the M5 nipple closes automatically and traps the resin.
Allow the resin to cure as specified on the resin data sheet.
Extract the wedge by tapping it sideways with a hammer or pulling it out with pliers, depending on crack geometry. The packer is then cleaned and reused.

Applications

Concrete crack injection at high pressure (up to 50 bar)
Natural stone repair — Granite, sandstone, limestone, marble — where drilling would split the stone
Hollow brick and block walls — Where a drill hole would punch into the cavity
Heritage and listed buildings — Where the absence of drill marks is a planning requirement
Wood consolidation with epoxy — Drive directly into the timber crack; epoxy stabilises the wood from the inside
Wood preservative impregnation — Pressure injection of preservative chemicals into timber
Micro-cement suspension injection — High-pressure injection of cementitious grouts into stone masonry