PU Adhesive for Wood Bonding
Single-component, moisture-cure polyurethane adhesive (MPU-20) for bonding wood to wood, wood to steel and wood to fireproof / decorative board — used in door manufacturing, lightweight building boards, construction timber, stainless countertops and panel fabrication.
One adhesive for wood, metal and board
PUGLUE MPU-20 is a single-component, moisture-cure polyurethane that bonds wood to wood, and wood to steel, stainless and fireproof / decorative board — reaching ≥15 MPa metal-to-metal strength (on board the substrate fails before the bond). It is surface-dry in under 1 hour, cures in 4–8 h, resists high and low temperatures, and is toluene-free and formaldehyde-free. After curing the glue line is insoluble and non-melting.
Bonds Wood to Wood, Metal & Board
One polyurethane adhesive covers solid wood, engineered panels and mixed wood-to-metal / wood-to-board builds.
Wood & panels
- Solid wood & construction timber
- Plywood & multi-layer wood
- MDF, particleboard & OSB
- Veneer & decorative overlays
Bonds to
- Wood-to-wood (self-bonding)
- Galvanized / color steel
- Stainless steel countertops
- Fireproof & decorative board
Build types
- Wooden & steel-wood doors
- Lightweight building boards
- Furniture & cabinetry
- Vehicle & ship interiors
Types of Wood Adhesive — and Which to Choose
Wood is bonded with several adhesive chemistries. PUGLUE’s single-component MPU-20 polyurethane is the choice for strong wood-to-wood and wood-to-metal / board bonds.
| Adhesive type | Components | Best for | Notes |
|---|---|---|---|
| 1K PU (MPU-20) | Single-component | Wood-to-wood, wood-to-metal / board | Moisture-cure, ≥15 MPa, formaldehyde-free, fire-rated grade. PUGLUE core product. |
| PVA / white & yellow glue | 1K | Interior furniture, edge-gluing | Low cost and easy, but limited water resistance and creeps under sustained load or heat. |
| Two-component PU / EPI | A + B | Structural laminating, glulam | High water resistance; needs accurate metering. Available on request. |
| Hot-melt (EVA) | 1K | Edge-banding, fast set | Softens / re-melts with heat — not for structural or load-bearing joints. |
Most wood-and-panel plants run the single-component MPU-20 — tell us your boards and substrates and we’ll confirm the grade.
Where PUGLUE Wood Adhesive Is Used
From wood-to-steel doors to furniture and stainless countertops, MPU-20 bonds wood across woodworking and building-products sectors.
Engineered Performance
Strong, clean and durable — the profile wood and panel lines require.
High bond ≥15 MPa
Metal-to-metal tensile strength ≥15 MPa; on wood and board the substrate fails before the glue line.
Fire-rated
GB 8624-2006 type-tested with low-flame-spread report and smoke toxicity grade ZA1 (GB/T 20285-2006).
Toluene & formaldehyde-free
Certified free of added toluene and formaldehyde — suited to indoor air and green building, unlike urea-formaldehyde glues.
Insoluble & heat-stable
Once moisture-cured the glue line is insoluble and non-melting, with high and low-temperature resistance.
How to Apply MPU-20
A simple single-component workflow — no mixing, cured by ambient moisture.
Clean the surface
Remove oil and dust from both surfaces to be bonded.
Apply single-side
Spread evenly with a toothed scraper, or single-side coat with a roll coater, at 120–160 g/m².
Composite & press
Lay up the parts and press. To speed cure, spray a little water mist on the glue line first.
Cure
Surface-dry in ≤1 h, full cure in 4–8 h (adjustable). Clean tools with ethyl acetate.
Technical Parameters
Single-component MPU-20 polyurethane — datasheet values, customizable to your line.
| Property | Value |
|---|---|
| Type | MPU-20 single-component polyurethane (moisture-cure) |
| Appearance | Dark brown / tan viscous liquid |
| Density | 1.15 ± 0.05 g/cm³ |
| Viscosity | 8000–9000 mPa·s (adjustable) |
| Solid content | 94% |
| Coating weight | 120–160 g/m² |
| Surface-dry time | ≤1 h |
| Cure time | 4–8 h (adjustable) |
| Bond strength | Metal–metal ≥15 MPa; metal–non-metal: substrate fails first |
| Dilution / cleanup | Ethyl acetate |
| Packaging | 25 kg plastic drum / 200 kg iron drum |
Curing principle: single-component, cured by moisture in the air and on the bonded surface.
Coverage, Cure & Storage
Practical figures to plan your bonding run.
Coverage
Single glue line; tune to wood porosity. Too little weakens the bond.
Surface dry
Handleable quickly; a light water mist on the glue line speeds cure.
Cure time
Full cure, adjustable to your line speed and press cycle.
Packaging
25 kg plastic drum and 200 kg iron drum. Keep sealed against moisture.
Certifications & Compliance
MPU-20 is type-tested to Chinese national fire and indoor-air standards — documentation available for export.
Fire performance
GB 8624-2006 type test (nine indicators meet the national standard) and a low-flame-spread test report.
Smoke toxicity
Smoke toxicity grade ZA1 to GB/T 20285-2006.
Indoor-air safety
National coating-quality reports certify no added toluene and no added formaldehyde.
Cold-storage tested
Tested by the Ministry of Agriculture cold-storage & refrigeration equipment quality centre.
Structural strength
Metal-to-metal bond ≥15 MPa; on wood / board the substrate fails before the bond.
Export documentation
TDS, certificates and test reports supplied for overseas wood and panel plants.
A Manufacturer You Can Build On
A dedicated polyurethane adhesive manufacturer — not a trading reseller — supplying wood and panel plants worldwide since 2010.
Consistent, tested quality
In-house QC on every lot so viscosity, cure speed and bond strength stay repeatable.
Full technical support
TDS, certificates, free trial samples and engineer support to match your boards, substrates and line speed.
OEM & private label
Manufacturer-direct pricing, your branding and stable supply — no middleman.
Packaging, Samples & OEM Supply
Manufacturer-direct supply built around wood- and panel-plant procurement.
Packaging
25 kg plastic drum and 200 kg iron drum — trial quantities on request.
Free trial sample
Trial samples with full TDS so you can validate bond and cure before committing.
OEM / private label
Your brand, your spec — manufacturer-friendly MOQ and repeatable batches.
Global export
Export-ready documentation, certificates and logistics support.
Frequently Asked Questions
Wood adhesive (MPU-20) — technical answers for wood and panel manufacturers.
What adhesive bonds wood to wood and wood to metal?
A single-component moisture-cure polyurethane — PUGLUE MPU-20. It self-bonds wood boards and bonds wood to galvanized / color steel, stainless steel and fireproof / decorative board, with ≥15 MPa metal-to-metal strength and a formaldehyde-free glue line.
Is it formaldehyde-free and toluene-free?
Yes — national coating-quality reports certify no added formaldehyde and no added toluene, so it suits indoor-air and green-building requirements, unlike urea-formaldehyde wood glues.
What does it bond besides solid wood?
Plywood, MDF, particleboard and OSB, plus wood-to-steel, wood-to-stainless (countertops) and wood-to-fireproof / decorative board. Widely used in door, furniture, lightweight-building and vehicle / ship manufacturing.
How strong is the bond?
Metal-to-metal tensile strength is ≥15 MPa. On wood and board substrates the material itself fails before the glue line.
How much adhesive do I need (coverage)?
Coating weight is 120–160 g/m² on a single side, tuned to wood porosity. Too little weakens the bond; too much extends cure time.
How long is the surface-dry and full cure time?
Surface-dry in ≤1 hour and full cure in 4–8 hours (adjustable). A light water mist on the glue line accelerates the moisture cure.
How is it applied?
Clean off oil and dust, spread the glue single-side with a toothed scraper or roll coater, composite the parts and press. Tools clean up with ethyl acetate.
Is it fire-rated?
Yes — MPU-20 is type-tested to GB 8624-2006 with a low-flame-spread report and smoke toxicity grade ZA1, suitable for fire doors and fire-rated boards.
What is the shelf life and how should it be stored?
Store in an ordinary indoor warehouse. Because it is moisture-cure, reseal drums after use and keep them away from humidity; nitrogen-blanket for long-term storage.
Do you offer samples, TDS, certificates, MOQ and OEM?
Yes. We provide a full TDS, certificates, free samples, and OEM / private-label supply with manufacturer-friendly MOQs. Contact us for a quote matched to your boards and substrates.
The PUGLUE Grade for This Application
The matched adhesive grade for wood & OSB panels.
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