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Chemlok® 6225 – Covercoat adhesive for bonding elastomers to metals with superior heat and salt spray resistance

Item Name: Chemlok® 6225
Manufacturer: Parker Lord (a Parker Hannifin company)
Technologies: Solvent-based adhesive with organic polymers and dispersed fillers
Color: Black liquid
Cure Type: Room temperature drying and heat-assisted curing during rubber vulcanization
Package Size: Contact to Techniq VN for details.
Shelf Life: 12 months

1. Product Overview

Chemlok® 6225 is a covercoat adhesive formulated to bond a wide variety of elastomers to metals. It contains dissolved organic polymers and dispersed fillers in a xylene/MIBK solvent system. The product provides excellent adhesion, particularly with soft NR compounds using semi-EV cure systems, and ensures strong environmental resistance against heat and salt spray. It can be applied by dip, spray, brush, or roll coat methods.

2. Applications

  • Bonding elastomers: NR, BR, IR, CR, SBR, NBR to metal.

  • Typically used with Chemlok® 205 primer for optimal adhesion.

  • Suitable for components exposed to heat and corrosive environments.

  • Applied by brush, spray, dip, or roll coat with controlled dry film thickness (15.2–20.3 µm).

3. Typical Properties

Property Value Condition/Notes
Appearance Black liquid Visual
Viscosity 50 – 200 cps (Brookfield LVT, spindle 2, 30 rpm) / 25 – 80 sec (Zahn Cup #2) At 25°C (77°F)
Density 970 – 1020 kg/m³ (8.1 – 8.5 lb/gal) At 25°C
Solids Content 25.5 – 29.5 % By weight
Flash Point 27°C (81°F) Seta closed cup
Solvents Xylene, MIBK Main solvent system
Dry Film Thickness 15.2 – 20.3 µm (0.6 – 0.8 mil) Recommended range
Shelf Life 1 year Stored 21–27°C, unopened container

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