Chemlok 5150 Fluoroelastomer-to-Metal Treatment

Product overview

Chemlok 5150 promotes adhesion of uncured fluoroelastomers (FKM) to metal. For fluoroelastomers with an incorporated cure system, it also works on mechanically prepared or phosphatized metals, including those used in dynamic seal production. It also bonds fluoroelastomers to stainless steel, aluminum and brass.

Selection features

• Low viscosity supports dip and spray application.
• Helps avoid staining or discoloration of non-black elastomers.
• Provides resistance to Reference Fuel C and No. 2 diesel.
• Accommodates different fluoroelastomer formulations and post-cure processes.

Application and curing

Remove oils, grease, rust and oxide layers from the metal using suitable chemical or mechanical preparation. Apply by dip, tumble spray or conventional spray. No agitation is required before or during use; methanol or ethanol may be used if dilution is needed.

Allow the coating to air-dry. If forced-air drying is used, keep the temperature below 93°C.

The cure-temperature range is 165–188°C. Select the post-cure schedule for the rubber formulation and part thickness; exceptionally thick parts require a staged post-cure approach.

Typical properties

Property	Typical value
Appearance	Colorless to pale yellow liquid
Density	780.0–830.0 kg/m³
Solids by weight	4.9–5.8%
Solvent system	Methanol

Typical values are for reference, not product specifications. Validate the bonding and post-cure process for the intended component and service fluids.

Supply and technical enquiries

Hongtu Chemical supplies Chemlok 5150 as an authorized distributor. Contact our team for quotations, technical documents or advice on FKM-to-metal bonding.