3M™ HoldFast 70 Adhesive, Clear
3M™ HoldFast 70 Adhesive is an industrial spray adhesive packaged in pre-pressurized cylinders, designed for fast tack, high coverage and long open time bonding on a wide range of substrates — especially useful in construction, insulation attachment, panel bonding and HVAC applications. Its wide-web spray pattern and clear adhesive help deliver strong permanent or temporary bonds with minimal overspray.
Key Features
Industrial-grade spray adhesive: Designed for demanding applications such as construction, HVAC, manufactured housing and adhesive assembly tasks.
Very fast-tacking: Bonds almost immediately with a long open time, allowing positioning/adjustment of parts before final set.
Wide-web spray pattern: Delivers a controlled, heavy body pattern with low soak-in and minimal overspray, ideal for irregular or porous substrates.
Clear adhesive: Bonds without visibly discoloring surfaces, suitable for many visible joints and finishes.
Portable cylinder delivery: Ready-to-use pre-pressurized cylinder simplifies application on job sites.
Applications
3M HoldFast 70 is versatile for bonding and assembly across industrial and construction settings:
Polystyrene foam and insulation attachment – bonds foam and insulation panels without damaging surfaces.
Construction materials bonding – adheres drainboards, FRP panels, geotextiles, house wrap and membranes.
Appliance, manufactured housing & HVAC panels – attachment of ceiling/pipe insulation, duct liners and protective layers.
One- and two-surface bonding (e.g., foam to metal/wood) with quick initial adhesion and permanent bond formation.
Marine, RV and specialty vehicle assembly – interior bonding, insulation, trimming and finishing.
Product Data | |
| Property | Typical Value |
| Appearance | Clear to pale yellow spray liquid |
| Adhesive Type | Synthetic elastomer adhesive |
| Container | Pre-pressurized cylinder for spray system |
| Open Time | ~1–60 minutes (adjustable with application thickness) |
| Spray Pattern | Wide-web, heavy body, low soak-in |
| Heat Resistance | Approx. 88–90 °C (190 °F) design temp |
| VOC Content | Up to ~560 g/L (typical cylinder formula) |
| Coverage | High solids content helps maximize coverage and holding power |
Safety & Handling
Hazards & Precautions
Flammable mixture: Spray cylinders contain flammable propellants and solvent vapors — keep away from open flames or sparks.
Vapor inhalation risk: Use with good ventilation; avoid breathing vapors or mist.
Skin/eye contact: May irritate; wear chemical-resistant gloves and eye protection during use.
Protective clothing: Prevent prolonged skin contact; solvent adhesive can dry skin.
Storage: Keep cylinders sealed in a cool, dry area — away from direct heat or sunlight.
First Aid (Typical)
Skin contact: Wash with soap and water; do not use solvents on skin.
Eye contact: Rinse immediately with plenty of water; seek medical help if irritation persists.
Inhalation: Move to fresh air; get medical attention for respiratory distress.
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