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Würth PUR Rapid Structural Adhesive

Würth PUR Rapid Structural Adhesive

24 in stock

Key Features

  • Rapid polyurethane (PUR) structural adhesive for high-strength bonded joints in trade and industry.
  • Tested to stress group D4 (DIN EN 204) by ift Rosenheim - excellent water resistance for exterior and interior use.
  • Meets DIN EN 14257 (WATT 91) requirements for window construction.
  • Adheres reliably to a wide variety of materials including wood, metals, plastics, ceramics, and construction substrates.
  • Paste-like, thixotropic consistency - non-drop formula allows precise application on vertical surfaces.
  • Mildly foaming during curing, filling slight irregularities and ensuring good contact on uneven surfaces.
  • Can be sanded and painted over after full curing.
  • Resistant (short-term) to diluted acids, alkalis, and solvents.
  • Silicone- and solvent-free - safe for bodyshop, construction, and industrial environments.
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Description

High-Strength Industrial Adhesive

High-Strength Industrial Adhesive
Würth PUR Rapid Structural Adhesive is a professional-grade polyurethane adhesive designed for structural bonding applications. Its fast-curing, high-strength formula makes it ideal for demanding environments such as window and door construction, staircase manufacturing, and general joinery.

Certified Performance

  • DIN EN 204 D4 Classification - suitable for interior and exterior joints exposed to frequent water contact and condensation.
  • DIN EN 14257 (WATT 91) - proven heat resistance for window and door applications.

Versatile Bonding Range

The adhesive demonstrates excellent adhesion on:

  • Wood and wood-based materials (chipboard, MDF, plywood, solid timber).
  • Metals including aluminium, stainless steel, brass, and copper (with appropriate pre-treatment).
  • Plastics such as ABS, hard PVC, polycarbonate, GRP, and decorative laminates (with suitable primers where required).
  • Construction substrates including concrete, cement fibre boards, natural stone, and tiles.

Paste-Like Consistency

The thixotropic, paste-like formula prevents dripping, enabling precise application even on vertical or overhead surfaces. The adhesive also foams slightly during curing, improving gap-filling ability on uneven bonding surfaces.

Durable and Weather Resistant

Once cured, PUR Rapid offers long-term resistance to moisture, heat (up to +110 °C), and short-term exposure to diluted acids, alkalis, and solvents. It can be sanded, painted, and powder-coated (200°C/30 min) after curing.

Notice:

  • Adhesion performance depends on correct surface pre-treatment.
  • Direct UV exposure can discolour the adhesive but does not impair strength.
  • Not suitable for bonding larch wood outdoors (due to arabinogalactan content).
  • Aluminium, copper, and brass must be pre-treated or coated for permanent, age-resistant bonding.
  • Bonding gaps >2mm significantly extend curing times; >3mm gaps are not recommended.
  • Avoid coating bonded workpieces before full adhesive curing - premature coating may cause blistering.
  • Stainless steel and zinc-plated surfaces must be properly cleaned and/or mechanically abraded before bonding.

More Information

Application Instructions

  1. Ensure surfaces are clean, dry, and free of grease. Pre-treat according to the optimisation table (cleaners, abrasion, primers as necessary).
  2. Apply adhesive as a continuous bead or spread with a toothed spatula (max. layer thickness: 3mm).
  3. Join parts within 5 minutes of adhesive application.
  4. Apply pressure: >= 0.015 N/mm^2 for surface bonding, >= 1 N/mm^2 for solid wood-to-solid wood bonding.
  5. Maintain pressure until adhesive has sufficiently cured.
  6. Allow full curing before sanding, machining, painting, or powder-coating.

Usage Notes

  • Application temperature: 5°C to 100°C.
  • Protect adhesive and bonded joints from UV exposure and permanent moisture.
  • Use corrosion protection when bonding metals to absorbent materials (to prevent long-term oxidation).
  • Store in original sealed container at 15-25°C.
  • Shelf life: 18 months.

Specifications

Density: 1.12 g/cm³ (at 20 °C)

Processing Temperature Range: +5 °C to +100 °C

Temperature Resistance (Continuous): –30 °C to +110 °C

Shelf Life: 18 months (15–25 °C, unopened)

UV Resistance: No

Chemical Resistance: Short-term resistance to diluted acids, alkalis, and solvents

Silicone-Free: Yes

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