Besil 9446 silicone sealant

Suitable for sealing lids and housings, attaching baseplates, gasketing, connector sealing, engine control, ABS, transmission, and lighting, household appliance

PREPARING SURFACES

All surfaces should be thoroughly cleaned and/or degreased with naphtha, mineral spirits, methyl ethyl ketone (MEK) or other suitable solvent. Solvents such as acetone or isopropyl alcohol (IPA) do not tend to remove oils well, and any oils remaining on the surface may interfere with adhesion. Light surface abrasion is recommended whenever possible, because it promotes good cleaning and increases the surface area for bonding.

A final surface wipe with acetone or IPA is also useful. Some cleaning techniques may provide better results than others; users should determine the best techniques for their particular applications.

ADHESION

• Beginor BESIL adhesives are specially formulated to provide unprimed adhesion to many reactive metals, ceramics and glass, as well as to selected laminates, resins and plastics.
• However, good adhesion cannot be expected on non-reactive metal substrates or non-reactive plastic surfaces such as Teflon_®, polyethylene or polypropylene. Special surface treatments such as chemical etching or plasma treatment can sometimes provide a reactive surface and promote adhesion to these types of substrates.
• Beginor BESIL brand Primers PM1268 and PM1266/PM1218 can
• be used to increase the chemical activity on difficult substrates. Poor adhesion may be experienced on plastic or rubber substrates that are highly plasticized, because the mobile plasticizers act as release agents.
• Small-scale laboratory evaluation of all substrates is recommended before production trials are made.

[auth-download url=”https://beginor-chemical.com/wp-content/uploads/2019/03/TDS-of-BESIL-9446-silicone-Semi-flowable-adhesive.pdf” title=”TDS Download BeSil 9446″]