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Description

Bostik High Tack H785 is a premium professional-grade hybrid adhesive engineered for applications requiring extremely high initial tack and long-lasting strength. Designed for demanding construction and installation tasks, this adhesive provides immediate bonding (“direct tack”) without the need for mechanical support. It adheres perfectly to most surfaces, even damp ones, and is suitable for interior and exterior use. Formulated without isocyanates, solvents, or silicones, H785 offers permanent elasticity, exceptional moisture and weather resistance, and compliance with BREEAM specifications, making it ideal for environmentally responsible building applications.

Available Pack Sizes

• 310 mL (White)

Stock Status

In Stock

Product Highlights

  • Extremely high initial tack — holds instantly without support
  • Permanently elastic for long-lasting flexibility
  • No solvents, silicones, or isocyanates
  • Perfect adhesion on most surfaces, including damp substrates
  • Resistant to moisture, weather conditions, and UV exposure
  • Suitable for BREEAM-compliant installations

Technical Specifications

PropertySpecification
TechnologyHybrid polymer adhesive
ColourWhite
Initial TackExtremely high — no support required
ElasticityPermanently elastic
Special FeaturesSolvent-free, silicone-free, isocyanate-free
Surface CompatibilityAdheres to most surfaces — even damp ones
Application AreasHeavy-duty bonding, construction fixings, structural adhesives

Application Instructions

  • Ensure surfaces are clean and free from loose particles.
  • Apply adhesive in vertical beads or dots for maximum performance.
  • Press materials together firmly to activate the high-tack bond.
  • No additional support is needed due to instantaneous grip.
  • Allow adequate curing time depending on thickness and temperature.

Coverage Calculator

  • A 310 mL cartridge provides approximately 12–15 meters of adhesive bead (based on 5 mm bead size).

Suitable Applications

  • Heavy cladding panels and facade elements
  • Construction elements requiring instant bonding
  • Bonding mirrors, insulation panels, metals, and composites
  • Interior and exterior architectural installations
  • Fixing decorative materials without screws or nails

Compatibility & Limitations

  • Compatible with most building materials, including damp substrates
  • Do not use in permanent water immersion unless approved
  • Test adhesion on non-standard or coated surfaces
  • Not suitable for PE, PP, or PTFE without primer checks

Safety & Handling

  • Use in a well-ventilated area
  • Avoid prolonged contact with skin or eyes
  • Store between +5°C and +25°C in a dry environment
  • Keep out of reach of children

Frequently Asked Questions

Its extremely high initial tack allows bonding without mechanical support.

Yes, it contains no solvents, silicones, or isocyanates.

Yes, it adheres perfectly even on damp substrates.

White (310 mL cartridge).

Yes, it is moisture- and weather-resistant.

Yes, it is suitable for BREEAM-compliant installations.

Yes, it maintains elasticity for long-term performance.

Yes, its high tack allows bonding of heavy panels without screws.

Generally no, it adheres well to most surfaces without primer.

Most construction materials including wood, metals, composites, concrete, insulation panels, and more.

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Additional Details

  • Accept Payments:Credit Cards, Bank Transfer, Mobile Payments
  • Delivery:Yes
  • Take Out:Yes
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