Technical Data Sheet
Contact Adhesive · Code HM105NF
Taftbond HM105NF
Contact Adhesive
- Issued
- September 2023
- Reviewed
- Page
- 1
Properties
Taftbond HM105NF is the non-flammable version of the HM105 GPC contact adhesive, commonly used in tunnel boring projects for bonding EPDM gaskets to concrete segments. Besides its high bonding strength with a wide variety of substrates (concretes, timbers, metals, rubbers, laminates and more), it is ideal for applications on worksites that are potentially exposed to welding sparks, significantly reducing fire hazards. Taftbond HM105NF is also specially formulated to maintain a smooth flow without gelling up as quickly as normal contact adhesives. This eliminates uneven lumpiness, providing fast and consistent quality.
Features
- Non-flammable
- Stable storage
- High bonding strength with a wide variety of substrates
- Fast tack-free and adhesion build-up
Typical Properties
| Properties | Specification |
|---|---|
| Colour | Yellowish viscous liquid |
| Viscosity (Brookfield, Spindle 2 at 20 rpm, 25°C) | 4500 ± 50 cps |
| Density (gm/mil) | 1.5 ± 0.5 |
| Flash Point (ASTM D3828-18a, 2021) | 50°C |
| Tack-Free Time (30°C) | Approx. 10 - 15 minutes |
| Net Weight | 5.5 kg per tin |
| Shelf Life | 12 months from date of manufacturing |
| Storage Condition | Store in cool places away from direct sunlight |
Adhesion Performance (Overlap Shear, stainless steel to stainless steel)
| Cure Time | Median Bond Strength |
|---|---|
| 2 hours | 16.33 kGF |
| 4 hours | 18.27 kGF |
| 6 hours | 20.70 kGF |
| 24 hours | 21.00 kGF |
Overlap Shear Strength chart
Handling and application
| Surface preparation | Best results are achieved on clean, dry surfaces. Oil, grease and other contaminants can be removed by wiping with IPA, acetone or MEK. Refer to the method statement prior to commencement of the bonding application. |
|---|---|
| Application | Apply adhesive to both surfaces. Bond immediately as soon as the surfaces are tack-free, within 5 to 10 minutes (depending on ambient temperature). |
| Dwelling time | For large surface panel laminating, once bonded, apply even pressure from the inside out, making sure to avoid any air entrapment. |
| Curing time | The bonding strength increases over time. 80% of ultimate strength is reached in approx. 2 hours, 90% within 4 hours, and full cure after 6 hours (depending on ambient conditions). |
| Product appearance | Colour and viscosity may vary between batches, but the performance and integrity of bonded parts will not be compromised in any way. |
Industry Applications
- Tunnelling and civil infrastructure: bonding EPDM gaskets to precast concrete tunnel segments in tunnel boring machine (TBM) projects
- Transportation: fire-sensitive assembly areas in rail, marine and aerospace MRO environments
- General manufacturing: hot-work zones, welding bays, and any production environment requiring a non-flammable bonding solution
Compliance and quality
Made under the ISO 9001 quality management system of Vitrochem Technology. RoHS declarations and Safety Data Sheets are available on request.