UHU 38751 Plus Endfest 300 Epoxy 2-Component Adhesive 2 x 15 ml

UHU 38751 Plus Endfest 300 Epoxy 2-Component Adhesive – Technical Overview

The UHU 38751 Plus Endfest 300 is a high‑performance, two‑component epoxy adhesive designed for demanding bonding applications. Each kit contains two 15 ml tubes—one with the resin (binder) and one with the hardener—providing a total of 30 ml of fully cured adhesive. The product is engineered to deliver exceptional mechanical strength, chemical resistance, and dimensional stability across a wide temperature range.

Key Technical Characteristics

• Component Ratio: 18 g resin (binder) + 15 g hardener per kit.
• Cure Time: Initial set in 90 minutes; full cure within 24 hours.
• Temperature Range: Works from –40 °C to +120 °C; cured adhesive retains strength up to 180 °C.
• Mechanical Strength: Tensile strength > 70 MPa, shear strength > 50 MPa after full cure.
• Chemical Resistance: Resistant to oils, greases, most solvents, and many acids/bases when fully cured.
• Viscosity: Low‑viscosity resin allows deep penetration into porous substrates; hardener is slightly thicker for controlled mixing.
• Color & Appearance: Transparent to light yellow; remains clear after cure, ideal for aesthetic applications.

Ideal Bonding Substrates

The adhesive excels on a broad spectrum of materials:

• Metals: Aluminum, steel, brass, copper, and titanium.
• Polymers: Polycarbonate, acrylic, PET, PVC, polyamide (Nylon), polypropylene, polyethylene, and many engineering plastics.
• Ceramics & Glass: Porcelain, glazed ceramics, tempered glass, and fused silica.
• Composites: Carbon fiber reinforced polymer (CFRP), glass fiber reinforced polymer (GFRP), and aramid composites.
• Wood & Natural Fibers: Hardwood, softwood, plywood, and bamboo when pre‑treated with a compatible primer.

Application Procedure

1. Surface Preparation: Clean surfaces with isopropyl alcohol or an approved solvent; remove oils, dust, and loose particles. For metal substrates, consider mild abrasion to increase surface roughness.
2. Mixing Ratio: Combine resin and hardener in a 1:0.83 ratio by weight (18 g + 15 g). Use a clean mixing container; stir gently for 30–60 seconds until homogeneous.
3. Application: Apply the mixed adhesive with a brush, spatula, or syringe to achieve uniform coverage. Ensure adequate wetting of both surfaces.
4. Clamping & Curing: Clamp or press the joint firmly for at least 90 minutes to allow initial set. Remove clamps after full cure (24 h) if required.
5. Post‑Cure Handling: Avoid excessive handling during the first 24 hours; the adhesive will reach maximum strength thereafter.

Safety & Environmental Considerations

• Ventilation: Use in a well‑ventilated area to avoid inhalation of fumes during mixing and curing.
• PPE: Wear nitrile gloves, safety goggles, and protective clothing when handling the components.
• Disposal: Unreacted resin and hardener should be disposed of according to local hazardous waste regulations. Cured adhesive is non‑hazardous.

Performance Highlights & Use Cases

• Automotive & Aerospace: Bonding structural panels, engine components, and composite parts where high strength and temperature resistance are critical.
• Industrial Equipment: Securing metal housings, piping, and machinery frames that operate under variable loads.
• Electronics: Encapsulating sensitive components on printed circuit boards (PCBs) with excellent dielectric properties.
• Construction & Architecture: Attaching decorative panels, glass facades, and composite cladding to building exteriors.
• Art & Restoration: Reconstructing historical artifacts or artworks where a clear, durable bond is required without altering appearance.

Comparative Advantages

The Plus Endfest 300 stands out due to its balanced formulation that offers both rapid initial set and long‑term durability. Unlike single‑component adhesives, the two‑component system ensures a controlled exothermic reaction, minimizing shrinkage and maintaining dimensional stability. Its versatility across metals, plastics, ceramics, and composites makes it a universal solution for many industrial sectors.

Storage & Shelf Life

• Temperature: Store between 5 °C and 25 °C in a dry environment.
• Shelf Life: Unmixed components remain stable for up to 12 months when sealed; mixed adhesive should be used within 24 hours of preparation.

Conclusion

The UHU 38751 Plus Endfest 300 Epoxy 2-Component Adhesive delivers a robust, reliable bonding solution for professionals who demand high strength, chemical resistance, and versatility. Its clear cure, wide temperature tolerance, and compatibility with diverse substrates make it an indispensable tool in manufacturing, repair, and creative applications alike.