LENS BOND Type F-65 was developed for its rapid room temperature cure. With F-65 the engineer can test his systems in a few hours. Type F-65 also saves time in pilot and small production runs, or where curing ovens are not available. Type F-65 meets MIL-A-3920 Standards.

Curing Times

Sufficient catalyst is supplied with the bottle of cement, mixed at a 2:100 ratio or more. Changes of the ratio will alter the curing times, i.e. cure rate can be accelerated by increasing the catalyst.

Room Temperature 22°C
Oven Temperature 70°C
Catalyst Ratio Pre-Cure Full-Cure Pre-Cure Full-Cure
2:1000 60 minutes 36 hours Not recommended!
5:1000 30 minutes 1 day Not recommended!

Technical Data

Viscosity: 275 cps to 320 cps
Refractive Index: 1,55 at 25°C (full cured) resp. 1,53 (uncured)
Operational Temperature Range: -54°C (-65°F) to +100°C (+212°F)
Shear Strength: 5,200 lb/inch2
Dielectric Contrast: 3 at 106 cps
Water Absorption: 0,3% (24 hours, 25°C)
Shrinking in Cure: approx. 4%
pH: 3,2
Specific Gravity: 1,22
Shore D Hardness: approx. 90
Thermal Conductivity: 500 x 10–6 cal (sec) (cm2) (°C) (cm)
Flash Point (uncured): 50°C
Outgassing CVCM: 0.1 %
Shipping and Storage: No special handling; should be kept from intense light and elevated temperatures.

Shelf Life: 18 months from date of manufacture

Packing Size: 114 g (4 oz).