PU Adhesive for XPS & EPS Foam Boards
Two-component, solvent-free polyurethane adhesive (PU-50) for bonding XPS and EPS insulation boards to calcium-silicate board, foamed-cement board, steel, aluminum and stone — the core adhesive for external-wall-insulation decorative integrated panels.
A solvent-free board adhesive for insulation panels
PUGLUE PU-50 is a two-component, solvent-free polyurethane (A : B = 5 : 1) that bonds XPS and EPS foam boards to rigid facings — calcium-silicate board, foamed-cement board, steel, aluminum and even marble and granite. It cures at room temperature, is thixotropic (no sag, no flash-off needed), reaches ≥99% solids with no benzene, formaldehyde or solvent, and gives boards excellent water, cold and weather resistance — the right adhesive for external-wall-insulation (EWI) decorative integrated panels. On peel the board itself fails before the bond.
Bonds Insulation Board to Every Substrate
One two-component system bonds foam insulation boards to the full range of rigid facings used in insulation panels.
Foam boards
- XPS extruded polystyrene
- EPS expanded polystyrene
- Rigid PU / PIR board
- Phenolic foam board
Rigid facings
- Calcium-silicate board
- Foamed-cement board
- Steel & aluminum sheet
- Marble & granite
End builds
- EWI decorative integrated panels
- Insulation & decoration boards
- Building & facade insulation
- Cold-room & equipment insulation
Types of Insulation-Board Adhesive — and Which to Choose
Foam insulation boards are bonded with several chemistries. PUGLUE’s two-component PU-50 is the choice for structural board-to-facing bonds in insulation panels.
| Adhesive type | Components | Best for | Notes |
|---|---|---|---|
| Two-component PU (PU-50) | A + B, 5:1 | Foam board to rigid facing | Solvent-free, room-temp cure, ≥99% solids, no benzene / formaldehyde. PUGLUE core product. |
| Single-component PU | 1K moisture-cure | XPS-to-XPS board bonding | For foam-to-foam bonding, as recommended for like-on-like boards. |
| Cement / mortar | Powder | Board-to-wall dot bonding | For sticking boards to a wall, not for decorative integrated panels. |
| Water-based / hot-melt | 1K | Light / temporary | Lower water and weather resistance — not for structural insulation panels. |
For decorative integrated insulation panels, plants run the two-component PU-50 — XPS-to-XPS bonding uses a single-component PU. Tell us your board and facing and we’ll confirm.
Where PUGLUE Foam-Board Adhesive Is Used
From external-wall insulation panels to cold-room insulation, PU-50 bonds foam board to rigid facings across the building-insulation industry.
External Wall Insulation (EWI) Panels
Bonding XPS / EPS to decorative facings for insulation-and-decoration integrated wall panels.
Insulation Decorative Integrated Boards
One-step structural bond for factory-made insulation + decoration composite boards.
Foam Board to Calcium-Silicate / Cement
XPS / EPS bonded to calcium-silicate and foamed-cement board for fire-safe panels.
Foam Board to Steel & Aluminum
Metal-faced insulation panels for facades, partitions and equipment.
Foam Board to Marble & Granite
Lightweight stone-faced insulation and decorative panels.
Building & Cold-Room Insulation
Facade insulation, cold rooms and equipment insulation needing water and weather resistance.
Engineered Performance
Solvent-free, strong and weatherproof — the profile insulation-panel lines require.
Solvent-free & clean
≥99% solids with no benzene, formaldehyde or solvent — safe, low-emission room-temperature curing.
High bond strength
On peel the foam board itself fails before the glue line — a true structural bond.
Water, cold & weather resistant
Keeps panels stable through moisture, cold and outdoor weathering.
Thixotropic — no sag
Holds on vertical and overhead joints with no run or flash-off needed before pressing.
Mixing & Application
A two-component 5:1 system for board lamination.
Clean the surface
Make sure the board and facing surfaces are free of oil and dust.
Mix A : B = 5 : 1
Mix components A and B at 5:1 by weight with a power stirrer until uniform (stir settled A first).
Apply 150–300 g/m²
Spread with a toothed scraper or roll coater. For roller use, pour in small batches to avoid set-up on the roller.
Composite & press
Lay up and press within the <15 min pot life; cure at room temperature (time varies with temperature).
Technical Parameters
Two-component PU-50 — representative values.
| Property | Value |
|---|---|
| Type | PU-50 two-component, solvent-free polyurethane |
| Appearance | A: white viscous liquid | B: dark brown liquid |
| Viscosity (25°C) | A: 9000 ± 50 mPa·s | B: 2100 ± 20 mPa·s |
| Mixing ratio | A : B = 5 : 1 (by weight) |
| Density | 1.30 ± 0.11 g/cm³ |
| Solid content | ≥99% (solvent-free) |
| Bond strength | On peel: non-metal (board) substrate fails first |
| Pot life (mixed) | < 15 min |
| Coating weight | 150 – 300 g/m² |
| Cure | Room temperature (time varies with temperature) |
| Packaging | A: 25 kg iron drum | B: 5 kg plastic drum (5:1) |
Mixed pot life is about 15 min at room temperature — mix only what you can use. Choosing a foam-board adhesive? Read: Best adhesive for XPS & EPS foam boards.
Coverage, Pot Life & Storage
Practical figures to plan your board-lamination run.
Mixing ratio
A : B by weight. Off-ratio mixing weakens cure and bond — meter accurately.
Coverage
Single glue line; tune to board and facing porosity.
Pot life
Use mixed adhesive within ~15 min at room temperature.
Packaging
A in 25 kg iron drum, B in 5 kg plastic drum. Store away from direct sunlight.
A Manufacturer You Can Build On
A dedicated polyurethane adhesive manufacturer — not a trading reseller — supplying insulation-panel plants worldwide since 2010.
Consistent, tested quality
In-house QC on every lot so viscosity, pot life and bond strength stay repeatable.
Full technical support
TDS, free trial samples and engineer support to match your boards, facings 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 insulation-panel procurement.
Packaging
Component A in 25 kg iron drums, component B in 5 kg plastic drums (5:1 set).
Free trial sample
Trial samples with full TDS so you can validate bond and pot life before committing.
OEM / private label
Your brand, your spec — manufacturer-friendly MOQ and repeatable batches.
Global export
Export-ready documentation and logistics support.
Frequently Asked Questions
XPS / EPS foam-board adhesive (PU-50) — technical answers for insulation-panel makers.
What adhesive bonds XPS / EPS foam board to other materials?
A two-component, solvent-free polyurethane — PUGLUE PU-50 (A : B = 5 : 1). It bonds XPS and EPS boards to calcium-silicate board, foamed-cement board, steel, aluminum and stone, curing at room temperature for insulation-and-decoration integrated panels.
What is the mixing ratio and pot life?
Mix A : B = 5 : 1 by weight. The mixed adhesive has a pot life of under 15 minutes at room temperature, so mix only what you can apply in time.
Is it solvent-free and low-emission?
Yes — it is ≥99% solids with no benzene, no formaldehyde and no solvent, and cures at room temperature.
How strong is the bond?
It is a structural bond — on peel testing the foam board itself fails before the glue line.
How much adhesive do I need (coverage)?
Coating weight is 150–300 g/m², tuned to board and facing porosity.
Can I bond XPS board to XPS board with it?
For foam-to-foam (XPS-to-XPS) bonding we recommend a single-component PU; the two-component PU-50 is for bonding foam board to rigid facings such as board, metal and stone.
Is it suitable for exterior / weather exposure?
Yes — the cured bond is water-, cold- and weather-resistant, suited to external-wall insulation panels and facades.
How is it applied?
Clean the surfaces, mix A : B 5:1 with a power stirrer, spread 150–300 g/m² with a toothed scraper or roll coater, then composite and press within the pot life. Cure at room temperature.
What is the packaging and storage?
Component A ships in 25 kg iron drums and component B in 5 kg plastic drums (5:1 set). Store away from direct sunlight; stir settled component A before use.
Do you offer samples, TDS, MOQ and OEM?
Yes. We provide a full TDS, free samples, and OEM / private-label supply with manufacturer-friendly MOQs. Contact us for a quote matched to your board and facing.
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