Aptflex F41 Acoustic Putty
Aptflex F41 is a two-component, high performance, polyurethane sealant with acoustic absorption properties. Acoustically, the material has a high void fraction and is therefore very absorbing.
- Typical applications may include:
- Gap filler for test tank lining
- Directly applied acoustic absorber for vertical or inclined surfaces
- Bedding/mounting compound for sensitive devices
- Acoustic adhesive
- Acoustic repair compound
Using innovative chemically induced thixotropy, the mixed product takes the form of a sealant that exhibits remarkable ‘non-sag' properties facilitating direct application to vertical or inclined surfaces. When mixed, the material can be ‘piped', beaded or plastered, into place without sagging.
In cured form, the material is a touch resilient rubber with excellent hydrolytic stability.
Typical Properties:
| Appearance | Blue |
| Mix Ratio by Weight | 1.28:1.0 (A:B) |
| Sealant Rheology developed | 2-3 minutes |
| Usable Life | 20 minutes |
| Shore A Hardness | 85+/-3 |
| Cure | 48 hours at 25°C |
| Density | 0.85g/ml |
Bonding
Following evaluation, if it is found necessary to improve the adhesion of Aptflex F41 to certain substrates, then a primer is recommended. We can provide a suitable primer on request.
Storage
Polymer sachets stored between 10°C and 25°C have a shelf life of at least 12 months providing the aluminium outer has not been removed or damaged.
Bulk material stored in original unopened containers will also have a shelf life of at least 12 months.
