Injection Packers

Home » Injection Packers

We offer a wide range of injection packers, from diameter 6mm brass injection packers to diameter 25mm steel injection packers.

Injection Packers Manufacturer in China

Injection packers are essential tools that are used in high-pressure injection grouting applications across civil engineering, construction, and geotechnical projects. They are designed for the injection of polyurethane, epoxy, acrylate, or microfine cement, ensuring accurate material delivery into concrete cracks, masonry voids, and subsurface formations. Whether applied for waterproofing basements and tunnels, sealing structural cracks, or strengthening underground foundations, injection packers provide reliable performance and long-lasting results. Available in various types—including mechanical, surface-mounted, and inflatable types—they can meet the demands of diverse jobsite conditions.

At RUBOR, we can build custom injection packers to meet your specific specifications. Different materials, diameters, lengths, and valve locations can be customized depending on your detailed requirements. Our injection packers are manufactured from high-strength steel, aluminum, and reinforced plastic, and non-return valves to prevent grout backflow. With pressure resistance up to 500 bar (7,250 psi) and a variety of thread options (such as M6, M8, and M10 etc. ). These injection packers are widely used by contractors, engineers, and infrastructure specialists. They are also a vital component of any injection system, ensuring consistent performance in both above-ground and below-ground applications.

Injection Packers Application

When a structure has **water leakage, cracks, voids, loosened concrete, or unstable soil**. We should use injection packers to inject chemical grouting materials to fix them. The injection packers are commonly applied in **basements, tunnels, bathrooms, water tanks, retaining walls, and other underground structures** to stop leaks. When **active water seepage** occurs and surface waterproofing cannot solve the problem, high-pressure injection of polyurethane or acrylate through injection packers can seal the area from the inside. They are also essential when concrete or soil has **loose or honeycombed sections** that require epoxy or cement grout to restore structural strength.

Injection Packers By Nipple

We provide grouting packers with cone-head nipples, flat-head nipples, button-head nipples, and removable-head nipples.

Removable-head Injection Packers

13x110mm removable-head grouting packers

Flat-head Injection Packers

13X110MM flat-head concrete packers

Cone-head Injection Packers

13x110mm cone-head grouting packers

Injection Packers By Materials

We supply various injection packers with different material, with aluminum, steel, brass, plastic, etc.

Aluminum Injection Packers

14x110mm aluminum injection packers

Steel Injection Packers

13x115mm steel injection packers

Plastic Injection Packers

1/2” Bang-In ports injection packers

Brass Injection Packers

10x55mm brass injection packers

Surface Injection Packers

Plastic surface injection packers

Custom Injection Needles

Custom injection packers as per clients need.

Injection Packers

An injection packer is a device used to inject chemical grouting materials, such as epoxy or polyurethane (PU), acrylate gel, and microfine cement into cracks in concrete and other substrates. It is for crack injection and leak sealing. It is typically a metal or plastic port, it is installed into a hole and creates a seal to allow pressure to be build up, so the material can be forced deep into the cracks.

What Is An Injection Packer

Components and Structure of Injection Packers

Injection packers are precision-engineered devices used to inject grouting materials—such as polyurethane, epoxy, or cement—into cracks, joints, or voids in concrete structures. Each packer consists of several key components that work together to ensure effective sealing, high-pressure resistance, and reliable injection performance.

1. Body (Steel or Aluminum Tube)

The body serves as the central component of the packer, typically constructed from carbon steel, stainless steel, or aluminum alloy. It provides the structural integrity needed to withstand high injection pressures and acts as the conduit through which grout is delivered.

Steel mechanical injection packers: Offer high-pressure capacity and long-term durability.
Aluminum injection packers: Lightweight and easy to install, ideal for lower-pressure applications.

2. Rubber Sleeve (Sealing Element)

The rubber sleeve surrounds the body and expands when tightened or hammered into place, forming a secure seal against the borehole wall.

Made of natural rubber (NR) or neoprene (CR) to ensure elasticity and chemical resistance.
Prevents grout leakage during injection.
Provides effective sealing even in wet or irregular holes.

3. Washer and Expansion Nut

In mechanical injection packers, the expansion nut and washer work in tandem to compress the rubber sleeve when tightened. This action securely anchors the packer in the drilled hole and ensures a leak-free connection to the structure.

4. Ball Valve or Non-Return Valve (Check Valve)

Mounted at the front of the packer, the check valve permits one-way grout flow into the structure while preventing backflow.

Typically made of steel or brass, incorporating an internal steel ball and spring mechanism.
Enables controlled injection and safe pressure release after grouting.

5. Injection Head (Grease Nipple / Zerk Fitting)

The injection head, also referred to as a button head or grease fitting, connects the injection hose or coupler from the grout pump. It provides a secure, quick-connect point for high-pressure grout injection.

Standard thread sizes include M6, M8, M10, or 1/4″.
Compatible with common grouting system couplers such as grease or button head couplers.

6. End Cap or Plug (Optional)

Some packers are equipped with an end cap or sealing plug to close the injection port after use, preventing material backflow. This feature is particularly useful in projects that require multiple or sequential injections.

Injection Packers Working Principle

The injection packers, also known as the grouting nozzles, use high-pressure chemical grouting technology to stop leaks. The principle is to use the continuous high pressure generated by the injection grouting machine (injection pump) to inject chemical materials, such as polyurethane and epoxy resin into the internal gaps of the concrete, completely squeezing out the water in the gaps and filling them up, thereby achieving efficient water stopping and ensuring the waterproof performance of the building structure.

How to Use Injection Packers

Locate and Mark Cracks

For damp substrates, we should remove any hydrops from the surface. Once the substrate is thoroughly cleaned and slightly dried, please carefully inspect for cracks and mark their full length using a colored pen or chalk.

As regards the dry substrates, we should use an air pump or blower to remove surface dust so that we can accurately identify the cracks.

Drilling Holes

Based on the thickness of the concrete structure, we should drill holes at a distance of approximately 15–35 mm from the cracks, spaced alternately on both sides along its length.

To ensure the effective convergence of grout injected from adjacent holes within the crack, it is essential to determine the appropriate hole spacing based on site conditions. We generally recommend an initial spacing of 300 mm.

The hole diameter should match the type of injection packer used. For example, when we use diameter 13mm injection packers, we typically require 14 mm drill bits.

Drill at an angle of 45° to 60° to the surface, intersecting the crack at mid-depth (one-third of the slab thickness).

Install the Injection Packers

The injection packer is a critical component in the injection process, responsible for delivering grout materials into cracks. To install the injection packers, utilize an appropriate tool and tighten it securely until the rubber sleeve compresses firmly against the borehole wall. It is essential to ensure a tight seal between the rubber section of the injection packers and the hole to prevent any leakage during the injection process.

Sealing After Injection and Site Management

Upon completion of grouting and after the material has initially cured, all injection packers shall be removed. The vacant holes shall be sealed with non-shrink mortar or an epoxy patching compound to reinstate structural integrity and surface aesthetics.

All waste materials, including the used injection packers and grouting equipment, must be collected and disposed of in compliance with applicable environmental regulations and project specifications.

Finally, all the debris should be cleared from the work area, and the completion of grouting operations shall be properly documented.

Injection Packers Types and Features

Diverse Types:

We offer four distinct types of injection packers: brass, aluminum, steel, and plastic. The first three types are designed as ring pressure devices that operate on the principle of ring pressure fastening. A one-way stop valve is installed at the head to effectively prevent chemical grouting materials from flowing back under high pressure. The ring pressure expansion component utilizes a rubber sleeve with a diameter of 13mm, which fits into a grouting hole measuring 14mm in diameter. By tightening the ring pressure bolts, the rubber sleeve is compressed, securely anchoring the grouting nozzle within the grouting hole. The plastic injection packers offer easy installation; for certain models, they can be directly tapped into place within the grouting hole.

Outstanding Performance

Stable and High Pressure: Typically, these systems can achieve pressures exceeding 20MPa, enabling chemical grouting materials to penetrate deeply into minute cracks within concrete structures and delivering an exceptional water-stopping effect. Whether addressing minor cracks or larger gaps, our products handle both scenarios effortlessly.

Mature Injection Grouting Chemicals:

The technology for grouting chemicals is thorough and has with comprehensive range of varieties. It essentially facilitates single-component chemical grouting material production—eliminating on-site mixing requirements. Stable and reliable quality that allows immediate use upon opening the container—significantly reducing construction time and labor efforts. Furthermore, our chemical grouting material shows resistance to chemical corrosion, it remains non-toxic and environmentally friendly, also achieves permanent waterproofing capabilities. It is suitable for various construction projects with environmental protection mandates.

Convenient and Efficient Construction:

Our construction process is straightforward to implement, with rapid execution speed along with immediate and long-lasting water-stopping effects while minimizing labor intensity.

Versatile Applications:

Injection packers are independent of seasonal changes or weather conditions, making them suitable for a wide range of projects. These include maintenance tasks, emergency repairs, and potable water initiatives. Regardless of whether faced with frigid winters or sweltering summers, whether in arid climates or humid environments, the chemical injection works can proceed seamlessly to facilitate uninterrupted project advancement.

Normal Size Injection Packers Specifications

Product Model	Length	Applicable Drill Bit Diameter	Suitable Scenarios
A8	8 cm	14 mm	Standard concrete structures, such as basements and top slabs
A10	10 cm	14 mm	General concrete structures; frequently used for preventing leaks in concrete
A15	15 cm	14 mm	Leak prevention projects for thick concrete structures
A20	20 cm	14 mm	Structural applications including continuous walls and beam-columns
B8	8 cm	10 mm	Standard concrete structures such as basements and top slabs

Injection Packers Advantages

We supply high-quality crack injection packers in various types and materials to meet your specific project requirements.

High Pressure Resistance

The grout packers withstand high injection pressure, ensuring stable grout delivery into deep or fine cracks without leakage or failure.

Excellent Sealing Performance

New rubber sleeve provides a tight seal between packer and borehole, preventing backflow and maximizing grouting efficiency.

Durable Construction Materials

Manufactured from carbon steel, stainless steel, or aluminum, with optional galvanization for corrosion resistance and long service life.

Wide range of Sizes and Types

Available in various diameters and lengths to fit different substrate thicknesses and project needs, including mechanical and hammer-in types.

Customized Solutions Available

OEM/ODM services are offered to meet specific project requirements in size, material, or connection type

Compatible with Multiple Grouting Materials

Suitable for polyurethane, epoxy, acrylate, and microfine cement, making them versatile for both waterproofing and structural repair.

Injection Packers Assembly

Injection Packers assembly simply involves attaching the necessary components, the rubber sleeve, the bolt, the body, and fitting zerks.

We have tens of automatic assembly machines to assemble the injection packers to guarantee fast delivery.

Injection Packers Production Process

Step 1