Polyurethane Mastic Gun

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عددی

Polyurethane adhesive pump or mastic pump is designed to facilitate the use of sausage-type polyurethane adhesives. With its aluminum body, this pump is lightweight and convenient for repeated use. The polyurethane adhesive gun helps you easily and uniformly fill and seal gaps and joints. This pump is suitable for sausage-type polyurethane adhesives in 300ml, 400ml, and 600ml volumes, as well as sausage-type silicone adhesives and mastics.

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Features of Polyurethane Mastic Injection Pump

Suitable for high-viscosity adhesives
Easy and simple operating mechanism
Ergonomic handle design for hand comfort during use
Lightweight aluminum body suitable for humid conditions
High quality for long-term use
No dripping of adhesive, mastic, or paste from the pump

Applications of Sausage-Type Polyurethane Adhesive Injection Pump

Bonding fiber cement boards
Use in sandwich panels
Application in construction projects and building industry, concrete and aluminum structures
In the automotive industry for windshield installation and other uses

Physical Specifications of Polyurethane Mastic Gun

Body Material: Mainly made of durable metal (steel, aluminum, or stainless alloys) to withstand high injection pressure.

Weight: Between 0.8 to 2.5 kg depending on the type (manual, industrial, pneumatic, or electric).

Mechanism Type:

Manual (simple lever or geared)
Pneumatic
Electric (with motor for uniform injection)

Nozzle and Output Type: Equipped with a plastic or metal cuttable nozzle at desired angles for precise output control.

Cartridge Compatibility: Suitable for 310ml, 400ml, or sausage-type (600ml) cartridges. Some models feature interchangeable adapters for multiple sizes.

Ergonomic Design: Non-slip handle and soft trigger to reduce hand fatigue during prolonged use.

Chemical Specifications (Material Properties)

Chemical Resistance: Metal and internal parts must resist corrosion and solvents when exposed to polyurethane, epoxy, or silicone-based mastics.

Anti-Rust Coating: Industrial models typically use electrostatic paint, galvanization, or chrome plating to prevent corrosion.

Non-Reactive with Adhesive: Body and components do not chemically react with mastic compounds and are designed to resist curing damage.

Temperature Tolerance: Metal guns typically operate reliably within a temperature range of -10 to +50°C without deformation or performance loss.

Steps for Using Polyurethane Mastic Gun

Surface Preparation: The target surface must be dry, clean, and free of dust, grease, and oil. For concrete or porous surfaces, use a polyurethane primer if needed.
Gun Preparation: If using tube-type mastic:

Remove the plastic cap from the tube.
Attach the nozzle to the tube and cut it at the desired angle.
Insert the tube into the gun and pull back the pressure rod to secure it.

If using sausage (foil) mastic:

Cut the tip of the aluminum foil.
Place the foil into the special gun.
Attach the plastic nozzle and cut it in a V-shape or angled form.
Secure the gun cap and position the rod properly.

Mastic Injection: Gently and evenly press the gun trigger to release mastic from the nozzle. Move the nozzle along the joint or gap continuously without stopping to prevent air entrapment.
Tooling the Mastic: Immediately after injection, smooth the mastic surface using a plastic spatula or a finger moistened with soapy water. This improves adhesion and gives a neat finish.
Tool Cleaning: At the end of the job, clean the nozzle and any remaining mastic on the gun. If the mastic hasn’t dried, it can be cleaned with a cloth soaked in polyurethane thinner or mild solvent.