Chemlok 487 A＋B Two-Component TPE Bonding System

Chemlok 487 A＋B is a two-component system for bonding thermoplastic elastomers (TPEs) to metals, glass, thermoplastics, thermosets and other elastomers during injection molding.

Stir Chemlok 487A thoroughly, then add Chemlok 487B while continuing to stir. Use the ratio for the chosen measuring method:

Measuring basis	487A : 487B
By weight	100 : 13.6
By volume	100 : 15.0

Mix thoroughly before use and keep the mixed system in an enclosed vessel to prevent moisture contamination.

Clean the substrate to remove oil, grease, mold release agents and other contaminants. Apply by dip, brush or spray to a dry-film thickness of 17.8–25.4 μm. This requires a wet film of 170–244 μm.

For TPE-to-glass injection molding, apply Chemlok 144 primer to cleaned glass and allow it to hydrolyze thoroughly before applying Chemlok 487. Dry the covercoat for 1 hour at room temperature, or 3–10 minutes at 93°C. Preheat the primed and coated glass to 121°C before injection molding. Handle demolded assemblies carefully and allow 24 hours before testing.

Property	487A	487B
Appearance	Clear to yellow liquid	Clear to cloudy, water-thin liquid
Viscosity at 25°C, Brookfield LVT, spindle 2, 30 rpm	100–350 cps	1–10 cps
Density	860–910 kg/m³	780–820 kg/m³
Solids by weight	12.6–15%	1–2%

Typical values are for reference, not product specifications. The table describes the separate components, not the mixed adhesive.

Hongtu Chemical supplies Chemlok 487 A＋B as an authorized distributor. Contact our team to discuss the materials, process and technical documents for your application.