KLEIBERIT 501.8 1C PUR Adhesive D4 – fast

What is KLEIBERIT 501.8 1K-PUR-Adhesive D4?

KLEIBERIT 501.8 is a fast-setting, single-component polyurethane adhesive for high-strength and moisture-resistant D4 bonds. With an open time of approximately 8 minutes, this PUR adhesive is particularly suitable for rapid assembly, production, and bonding processes.

The adhesive can be used for wood, wood-based materials, and various mineral materials. It reacts with moisture and cures to form a durable, brown adhesive joint.

The variants are organized by container size and quantity. This allows for direct selection of individual containers, sensible bulk quantities, and full packaging units.

Areas of Application

• Window and door manufacturing
• Stair, furniture, and interior finishing
• Fast layer and surface bonding
• Joint bonding for high moisture requirements
• Bonding of wood and wood-based materials
• Bonding of mineral building boards
• Connections with ceramics, concrete, and rigid foam
• Assembly and production processes with short cycle times

Properties & Advantages

• Short open time of approx. 8 minutes
• Single-component and ready-to-use without hardener addition
• Meets stress group D4 according to DIN EN 204
• Suitable for fast assembly and production processes
• High moisture, heat, and weather resistance of the cured bond
• Can be used for wood, wood-based materials, and numerous mineral materials
• Moisture-curing PUR system
• Container and quantity variants clearly summarized in one parent article

Technical Specifications

• Product: KLEIBERIT 501.8
• Product Type: Fast single-component PUR adhesive
• Base: 1K-Polyurethane
• Color: Brown
• Stress Group: D4 according to DIN EN 204
• Open Time: Approx. 8 minutes
• Consumption: Approx. 100–200 g/m², depending on substrate and application
• Curing: By reaction with moisture
• Container Variants: 0.5 kg bottle and other available containers according to product overview
• PU of 0.5 kg bottle: 12 bottles per carton

Variants, SKUs & EAN Codes

The following overview simplifies selection, reordering, inventory management, and assignment to the respective KLEIBERIT manufacturer item numbers.

Application Notes

• The surfaces to be bonded must be clean, sound, dust-free, and free of grease, oil, or other release agents.
• At least one of the two parts to be joined should be sufficiently absorbent or moisture-permeable.
• For very dry materials, light moistening can support the reaction of the PUR adhesive.
• Apply the adhesive evenly and sparingly to one of the surfaces to be joined.
• Join the components within the short open time and apply sufficient pressure or secure them firmly.
• Prepare work processes in advance, as there is little time for application, alignment, and correction.
• Due to the moisture-dependent reaction, the adhesive may foam slightly during curing.
• Remove excess adhesive, if possible, before complete curing, according to manufacturer instructions.
• Conduct a trial bond before serial applications or with sensitive materials.
• Observe the technical data sheet, safety data sheet, and processing instructions on the container.

When is the short open time an advantage?

The open time of approximately 8 minutes is ideal for prepared, fast work processes. Components can be quickly joined and secured, making KLEIBERIT 501.8 particularly suitable for serial production, assembly work, and short production cycles.

For complex constructions or large-area bonding, however, it should be checked whether a longer open time is required.

Difference to KLEIBERIT 501.0 and 501.6

• KLEIBERIT 501.0: Universal version with a medium open time of approx. 20–25 minutes
• KLEIBERIT 501.6: Particularly long open time of approx. 70 minutes
• KLEIBERIT 501.8: Short open time of approx. 8 minutes for fast processes

The three versions are listed as separate parent articles due to their different processing properties.

What does stress group D4 mean?

Stress group D4 according to DIN EN 204 describes wood bonds with high moisture resistance. This includes indoor applications with frequent or prolonged water exposure, as well as suitable constructions for outdoor use.

The D4 classification refers to the adhesive joint. Construction, materials, and surface protection must also be suitable for the respective area of application.

Matching Accessories & other KLEIBERIT Products

Further PUR adhesives, PVAC wood glues, assembly foams, and special adhesives can be found in our KLEIBERIT Collection. For product selection, material, open time, moisture exposure, and desired processing speed should be particularly considered.

Frequently Asked Questions

What distinguishes KLEIBERIT 501.8 from 501.0?

KLEIBERIT 501.8 has a significantly shorter open time of approximately 8 minutes. KLEIBERIT 501.0, on the other hand, offers more time for application, alignment, and assembly with approximately 20–25 minutes.

When is KLEIBERIT 501.8 the right choice?

The product is particularly suitable for prepared, fast assembly and production processes where components can be joined and secured within a short time.

Is KLEIBERIT 501.8 ready to use?

Yes. It is a single-component PUR adhesive that is processed without the addition of a hardener.

For which materials is KLEIBERIT 501.8 suitable?

The adhesive is suitable, among other things, for wood, wood-based materials, mineral building boards, ceramics, concrete, and rigid foam.

Do the components need to be clamped during curing?

Yes. The workpieces must be held together with sufficient pressure or otherwise securely fixed during curing.

Does KLEIBERIT 501.8 foam?

The adhesive reacts with moisture and may foam slightly. Sufficient pressing pressure reduces foam formation in the adhesive joint.

Is KLEIBERIT 501.8 suitable for outdoor applications?

The adhesive joint meets D4 according to DIN EN 204. However, the entire component must still be designed structurally and with suitable surface protection for the respective outdoor use.

What quantity discounts are available for the 0.5 kg bottle?

The 0.5 kg bottle is available as a single item, in a pack of 6 bottles, and as a full packaging unit of 12 bottles.

Where can I find safety and manufacturer information?

Processing, hazard, and safety information can be found on the product container, the technical data sheet, and the manufacturer's safety data sheet. The structured manufacturer information is also maintained with the product.

Manufacturer:
KLEIBERIT SE & Co. KG
Max-Becker-Str. 4
76356 Weingarten
Germany

Brand Notice:
Original KLEIBERIT brand product. Sold via Bauwolke24.