Precote® 85

High-Strength & Heat-Resistant Thread Coating with Controlled Torque / Tension

Precote® 85 are varnish-like, solvent free coating systems based on micro-encapsulated acrylates for sealing and locking of threaded parts. The dried film is tack-free, non-sticky and can be used in all kind of assembly procedures. Its characteristics as a locking and sealing element become effective only when the capsules are ruptured by shear and pressure stress and the adhesive is allowed to cure.

Advantages

Curing begins in about 10 minutes with full locking in 8 hours
Controlled friction to improve joint tension
Epoxy chemistry for robust structural bonding performance
High torque performance
Environmental resistance to heat, automotive fluids, thermal and mechanical shock and vibrations
Bonds to a broad range of fastener finishes
Longest shelf life in the industry
Complies with or exceeds major OEM specifications
Seals against pressures up to 400 bar (5760psi)
Parts are ready for assembly
Precise thread coverage in every part
Can be applied on external and internal threaded fasteners
Is not affected by high humidity conditions
Dry-to-touch and tack free with good adherence

Technical Data

Color: turquoise (special colors available upon request)
Thread Friction Value > 0.10 – 0.15
Curing Time (RT) 8 hours (an additive of “-3” will reduce to 2 hours)
Temperature Range: -50°C (-58°F) to +170°C (+338°F)
Shelf life four years at room temperature
For small thread crest (less than 1 mm an additive of “-8” can be added to increased performance)

Performance Results