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Precision Acoustics

Aptflex F21

A two-part, high-performance encapsulation material, exhibiting toughness, excellent hydrolytic stability and an acoustic wave speed similar to that of seawater.

If you have any specific questions about this product, please contact us.

Overview

Aptflex F21 is a two-part, high-performance encapsulation material, exhibiting toughness, excellent hydrolytic stability and an acoustic wave speed similar to that of seawater.

These properties make Aptflex F21 an ideal system for hydrophone potting, marine encapsulation applications or as an acoustic window.

Aptflex F21 is particularly useful where small delicate components are potted since the material exhibits low shrinkage and hence stress during the cure phase.

Key features

  • Flexibility and resistance to temperature extremes of -50°C to 100°C
  • Low moisture sensitivity during the cure phase
  • Excellent hydrolytic stability
  • Excellent electrical insulation properties
  • Acoustic wave speed similar to that of seawater
  • Very low insertion loss

Tutorial on mixing acoustic materials

Technical specifications

Appearance Black
Density Part A 0.91 g/ml
Density Part B 1.22 g/ml
Mix ratio 3.35:1 (By Weight A:B)
Cured density 1.050 g/ml
Initial mixed viscosity 50 poise at 25 °C
Usable life 25 minutes at 25 °C
Gel time 50 minutes at 25 °C
Curing times*: 24-48 hours at 25 °C
over night 30 °C
5 hours at 50 °C
3 hours at 80 °C
Hardness 80-85 Shore A
Tensile strength 12 MPa
Elongation at break 300%

*Curing Times are temperature dependant. Precision Acoustics reserves the right to change the specification without notice.

The shelf-life of unopened containers is at least 12 months.

IMPORTANT

This product is subject to Dangerous Goods Movement control.

Please note this will typically incur an additional £270.00 surcharge for shipments outside the UK.