Soudal Purocol Express D4 Transparent Adhesive | 12 Pieces

Soudal Purocol Express D4 Transparent Wood Adhesive – Case of 12

Soudal Purocol Express D4 is a one‑component, moisture‑curing polyurethane wood adhesive classified as EN 204 D4 — the highest water‑resistance rating. It forms a fully transparent bond and is engineered for timber joints requiring exceptional resistance to water and humidity, performing reliably in both interior and exterior applications and delivering rapid strength build‑up even on thick sections. Supplied in standard 310 ml cartridges, this case of 12 units provides a consistent, cost‑effective supply for professional teams, joinery workshops, and furniture manufacturers.

Technical Specifications

• Brand: Soudal
• Product Name: Purocol Express D4 Transparent
• Chemistry: One‑component polyurethane — cures by reaction with moisture
• Colour: Transparent / Clear — completely invisible once cured
• Standard: EN 204 D4 — Highest water‑resistance class
• Pack Format: 310 ml Standard Cartridge
• Case Contents: 1 Case = 12 Cartridges
• Application Temperature: +5 °C to +35 °C
• Flash Point: >100 °C — Non‑flammable
• Lap Shear Strength: ≥ 10 N/mm² (fully cured)
• Temperature Resistance: -30 °C to +100 °C
• Open Time: Approx. 45–60 minutes (@ +20 °C)
• Fast Cure Profile: Handling strength in 3 hours; full cure in 24 hours
• Shelf Life: 12 months in unopened cartridge

Applications

• Timber window, door, and joinery manufacture — mandatory D4‑class projects
• Interior and exterior furniture — components subject to persistent moisture
• Woodwork for bathrooms, kitchens, and wet‑area fit‑outs
• Staircase, handrail, and balustrade assembly
• Solid timber panels, glued‑laminated beams, and structural timber joining
• Boatbuilding, garden furniture, and exterior timber cladding
• Multilayer boards, plywood, and MDF assemblies
• Structural timber construction and beam reinforcement

Product Advantages

• EN 204 D4 Highest Water Resistance: Maximum durability against continuous water contact, prolonged dampness, and full outdoor exposure; the preferred choice where D1/D2 adhesives are insufficient
• Completely Clear Cured Film: Unlike white/yellow wood glues, it dries fully transparent; no discolouration, staining, or visible joint line on light‑coloured timber, veneered, or varnished surfaces — for a flawless finish
• Rapid Strength Development: Express formulation reaches handling strength in 3 hours and full cure in 24 hours; accelerates production flow and reduces component holding time
• Flexible, Durable Bond: Does not become brittle; accommodates timber movement caused by humidity and temperature changes — joints won’t crack or loosen over time
• Broad Material Compatibility: Reliable across all solid timber species, plywood, MDF, particleboard, laminated boards, and veneered surfaces — no adhesive selection complexity per wood type
• Simple Application: Ready to apply directly with a standard sealant gun; no mixing, preparation, or special tools required — simply trim the nozzle and dispense
• High Bond Strength: Penetrates deeply into wood fibres to create a mechanical interlock; the joint becomes stronger than the timber itself — failure occurs in the wood, not the adhesive line
• Economical Case of 12: Ideal stock quantity for workshops and factories with ongoing production; lower unit cost and assured supply

Application Guidelines

• Surfaces must be dry, clean, and free from dust; oil, old adhesive, and loose debris will weaken the bond
• Timber moisture content should be 8–12 %; bond strength may be reduced on excessively dry or damp material
• Trim the cartridge nozzle to the required bead size; apply to one or both faces as specified by the project
• Spread adhesive to an even thickness; 100–150 g/m² is typically sufficient — thick layers will extend cure time
• Clamp and assemble within the open time window (approx. 45–60 min); bond strength drops significantly if this period is exceeded
• Distribute clamping pressure evenly; 0.3–0.5 N/mm² is optimal — firm enough for good contact without deforming the timber
• Minimum clamping time: 3 hours @ +20 °C; extend duration at lower temperatures or on thicker sections
• Remove excess adhesive with a damp cloth before it sets; cured residue can only be removed mechanically
• Provide adequate ventilation during cure; prevents accumulation of carbon dioxide gas released during reaction

Frequently Asked Questions

What does D4 mean?
EN 204 D4 is the highest water‑resistance class, confirming the adhesive withstands continuous water contact, prolonged dampness, and exterior weather exposure — superior to D1 and D2 grades.

Why is being transparent important?
It leaves no visible joint line, darkening, or staining on light timbers such as oak, beech, and maple; completely invisible under varnish for a premium, seamless appearance.

How does it differ from other Soudal wood adhesives?
Purocol Express D4 offers far superior water and humidity resistance compared to water‑based PVA glues; being one‑component, it requires no mixing — unlike two‑part systems — and is ready to use straight from the cartridge.

Can it bond materials other than wood?
Formulated primarily for timber; for wood‑to‑metal or wood‑to‑glass assemblies, please consult the full product data sheet to confirm suitability.