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Description
Product Overview
QMH® Metal Primer is a CFC free surface primer, designed to pair perfectly with QMH® Cold bonding Glue. It solves weak bond issues when joining rubber to metal and plastic to metal substrates.
Many bonding projects fail because metal surfaces cannot give enough grip for rubber or plastic materials. This primer builds a reliable intermediate layer between metal and your target material, greatly boosting bonding strength and long term connection stability. It works for on site assembly, repair jobs and workshop production use.
Product Specifications
| Item | Parameter |
| Color | Gray |
| Viscosity | 90 170 mPa·s |
| Density | 0.92 0.96 g/mL |
| Surface Curing Time | Around 30 minutes |
| Coverage | 50 200 g/m² per single coat |
| Storage Conditions | Keep in sealed barrels. Store in dry, cool area. Recommended room temperature: 20 25℃; humidity ≤ 50% |
| Shelf Life | More than 12 months under proper storage |
| Packaging | 700 g per can |
Key Benefits
- Zero CFC ingredients, meets common industrial environmental requirements
- Made for cold bond workflow, no high heat treatment needed during application
- Forms uniform grey priming layer on clean metal parts; improves glue anchoring performance
- Flexible coverage range, fits small repair pieces and large area metal workpieces
- Long shelf life with correct storage, good for factory stock and periodic maintenance use
Simple Application Tips
- Fully clean metal surface: wipe away oil, rust, dust before applying primer. Dirty surfaces will cut bonding performance.
- Apply one even coat of QMH® Metal Primer onto prepared metal surface.
- Wait roughly 30 min for surface cure. Do not use cold bonding glue before surface curing completes.
- Once surface is cured, apply QMH® Cold bonding Glue and complete your rubber metal or plastic metal bonding process.
Note: Coverage 50 200 g/m² varies, depends on metal surface roughness. Rougher metal consumes more primer per square meter.
FAQ
Q1: Can I use this metal primer without QMH® Cold bonding Glue?
A: This primer is formulated to work with QMH® Cold bonding Glue. Using other glues may not get expected adhesion results. We suggest matching the full QMH bonding system for best bond strength.
Q2: What will happen if storage humidity goes higher than 50%?
A: High humidity storage may shorten shelf life. Moisture can get inside once the can seal is broken. Always keep cans tightly sealed when you do not use them.
Q3: Is 30 minute surface cure time fixed for all environments?
A: 30 min is reference data under standard room conditions. Low temperature or high air moisture can slow surface curing. Check the primer surface is dry to touch before adding adhesive.
Q4: What substrates does this primer suit?
A: Mainly for metal base, to bond rubber and plastic onto metal. It is not designed to act as standalone protective paint for long term anti rust purposes.
Q5: How much primer do I need for my project?
A: Calculate area first. Smooth metal uses near 50 g/m²; rough, textured metal may go up to 200 g/m² for each coat. Adjust quantity based on actual workpiece surface condition.
Important Notes
- Only for industrial bonding use, not for consumer household DIY without proper operation protection.
- Keep good ventilation while handling. Avoid long term skin contact.
- Seal the can tightly right after each use.
Products
Base belt
Unlike standard belts, our base belts feature enhanced transverse stiffness to prevent deformation at deflection points, while maintaining longitudinal flexibility for smooth operation around pulleys. Manufactured strictly in accordance with international standards (DIN/ISO/EN), our base belts ensure long-term stability and reliable performance across demanding bulk handling applications.
Sidewall
This reinforced sidewall features premium rubber compound and integrated fabric reinforced structure to boost flexing fatigue resistance and prevent corrugation cracks. Validated by dynamic fatigue tests, it offers diverse rubber properties and multiple standard/custom sizes, delivering reliable long term performance under complex working conditions.
Pulley Lagging
High-performance ceramic pulley lagging addresses belt slip, fast wear, material buildup and short pulley life. This cold-bond type allows on-site installation without factory hot vulcanization. Combining 92% alumina ceramic tiles and rubber backing, it offers superior friction even under wet, muddy conditions for mining, quarry and port bulk-handling applications.
Rubber Wear Lining
Our rubber wear lining is a high-toughness protective rubber layer engineered for industrial equipment interiors. Featuring outstanding abrasion, impact and corrosion resistance, it effectively safeguards mills, chutes and hoppers from long-term material scouring. Lightweight, durable and fully customizable, it cuts maintenance costs and reduces noise, ideal for mining, cement and chemical industrial applications.
Sidewall Conveyor Belt
QBF rubber specializes in designing and manufacturing high-quality steep incline conveyor belts for bulk material lifting across industries such as harbors, metallurgy, tunneling, power plants, chemicals, cement, and metro. As the only Chinese manufacturer using full European molds and standards, QBF rubber provides complete solutions covering belt selection, production, installation, commissioning, and trouble shooting.
EPDM High Temperature Sidewall Conveyor Belt
Custom EPDM high temperature sidewall conveyor belt resists 300℃ instant thermal shock. Ideal for cement, metallurgy, power plant hot bulk material conveying.
Recent news
QBF rubber&MONSHTECH at China-ASEAN Mining Forum 2026 | Booth B052, Nanning
out 30, 2026
See you in Nanning.
The 14th China-ASEAN Mining Cooperation Forum kicks off November 6–8 at the Nanning International Convention and Exhibition Center. We’re taking booth B052. MONSHTECH — the bulk-handling brand we run under QBF rubber — will have our core conveyor lineup on the stand.
Why this forum, why now. Southeast Asian miners keep coming back to Nanning because it’s the one event where Chinese conveyor builders, EPC houses and the operators themselves end up in the same room. So we’re not flying out just for banners. We want to talk through actual projects.
What we usually end up fixing on site.
Walk onto a mine and the same three problems show up.
Routes that snake across hills and ravines — trucking that ore gets expensive fast, and one rainy season wrecks the budget.
Vertical lifts. Open-pit benches and underground shafts don’t play nice with a flat belt; you need something that holds material on a 40–60° incline.
And dust. Coarse, abrasive rock leaking at every transfer point — environmental teams aren’t forgiving about that anymore.
Our product line answers those three directly.
Ropetrackand overland conveyors take the load off trucks across broken ground.
Sidewallconveyor belts, sandwich belts and internal pocket belts handle the lift.
Pipe conveyors and continuous ship loaders close the loop from concentrator to port, with far less spillage.
What’s on the stand at B052.
ROPE-TRACK sidewall conveyor belt. Pipe conveyor belt. Open-pit and underground steep-angle belts. Underground internal bucket lift. Concentrator steep-angle belts. Sandwich belts. Continuous ship-loader sidewall units. Stackers and reclaimers for mine and port yards.
We scope single machines, system integration, and full EPC. Front-end survey up front, then supply, install, commission — and we don’t disappear after handover. Maintenance and upgrades are part of the deal.
If you’ve got a layout on your laptop, a site brief on your phone, or just a rough tonnage and a lift number — come find us. The engineers on stand will run through it with you: tonnage, material size, lift angle, route profile, power budget. Most of the mines we chat with leave with a haulage option that costs less than the truck-plus-standard-belt default they walked in with.
Event quick facts
14th China-ASEAN Mining Cooperation Forum & Exhibition (co-located with Guangxi International Mining Exhibition 2026)
November 6–8, 2026
Nanning International Convention and Exhibition Center
Booth B052
MONSHTECH is the bulk material handling brand of QBF rubber. We build conveyor systems, engineered products, EPC delivery and lifecycle service for mines, ports and stockyards.
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QBF rubber Custom Hot-vulcanized Cleated Belt
out 29, 2026
QBF rubber has shipped a new batch of custom cleated conveyor belts out of its plant this month. Built on hot-vulcanized construction, custom cleat design and special rubber compounds matched to each application, the belts are made for inclines where a flat belt loses its grip.
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Tunnel Shield Project | QBF rubber Anti-stick Sidewall Conveyor Belt Installation Service Delivered
out 20, 2026
Recently, the engineering service team from QBF rubber was dispatched to a tunnel project site and successfully completed on-site installation guidance for the sidewall conveyor belt. Supported by one-stop full-process technical services, the project’s conveying equipment achieved stable commissioning and high-efficiency operation.
Tunnel construction presents tough site conditions, featuring steep conveying angles and considerable risks of material back-sliding and spillage. Breaking away from the traditional product-only supply model, QBF rubber provides a full-chain custom service package for this project. The service scope includes preliminary site survey, working-condition analysis, custom belt selection and design, bespoke belt manufacturing, on-site hot-splicing joint execution and full-cycle installation technical guidance. This complete set of services fully meets the operational demands of steep-angle material handling for tunnel construction.
Shield tunnel jobs have tight working spaces, limited on-site manoeuvring, high muck volumes and wet excavated spoil. These conditions commonly cause spoil and fines to stick and pile up on conveyor belts. For this project, QBF rubber Anti-stick Sidewall Conveyor Belt was selected to tackle such field-proven issues. The belt’s special surface treatment resists sticking and enables good self-cleaning capability. It keeps damp tunnel muck and fine sand from clinging to the belt surface, helping avoid common problems triggered by material build-up: belt mis-tracking, slippage, faster-than-normal wear and reduced conveying capacity. Built with heavy-duty sidewalls and cleats, the belt is robust in structure, offers high tensile properties and holds up well against abrasion. It runs reliably for both vertical and steep inclined conveying work, cutting down significantly on material fallback, spillage and leakage. This brings tangible savings in on-site cleaning work and lowers the frequency of equipment maintenance.
Having expanded from standalone product supply to end-to-end technical services, QBF rubber keeps addressing practical tunnel conveying challenges through professional, custom-built solutions. Moving ahead, QBF rubber will keep focusing on shield-tunnel muck transport and steep-angle material handling applications. Continuous upgrades to product performance and service frameworks will deliver reliable support for the efficient, eco-friendly and safe running of more engineering projects.
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