Cilbond® 36

Bonding Capabilities:

• Cilbond 36 is a one-component system for bonding various peroxide-cured silicone, fluorosilicone, perfluoroelastomer, fluoropolymer, hydrogenated nitrile elastomers and some speciality EPDM compounds. Cilbond 36 also bonds platinum (Pt) cured silicones, a good range of bisphenol and bisamine-cured fluoropolymers, acrylic/ACM compounds and speciality AEM compounds.
• Cilbond 36 effectively bonds the above compounds to metal substrates including steel, stainless steel, aluminium and brass. Cilbond 36 will bond to engineering plastics, including all types of polyamide and also to glass and ceramics.

In-service Benefits:

• Cilbond 36 is fast-drying and the coating is then tough, chip resistant and non-blocking/tack-free.
• Cilbond 36 is non-staining, non-wiping, does not contribute to mould fouling and is particularly suitable for injection moulding processes. Cilbond 36 can be used for all conventional moulding processes. The product also has exceptional resistance to long, high temperature post-cure schedules.
• Cilbond 36 may be applied by brush, spray or using a dip-bath, without the need for special covers to prevent moisture ingress.

​​​​​Processing Benefits:

Components bonded with Cilbond 36 exhibit outstanding environmental resistance properties, including:

• Static and dynamic fatigue resistance at low and high temperatures (from -58°F to >>390°F)
• 1000 hours at 390°F or 400 hours at 435°F, without any loss of adhesion to the substrate
• The maximum heat resistance is compound dependent but bonds show no loss of CM (cement-metal) failure at up to 480°F or even higher for short periods
• Hot oils and fuels up to temperatures of 355°F
• Hot water (e.g. boiling water for 100 hours) without loss of metal adhesion
• Hot glycol / water mixes at up to 248°F for 300 hours without loss of adhesion
• Hot glycol mixtures for > 600 hours at 320°F without loss of adhesion
• Bond will show < 2–3mm edge failure after 500 hours in 5% salt-spray at 95-104°F with 30% applied strain

Stirring: Though it is not strictly necessary to stir Cilbond 36, it is recommended that it is stirred gently before use. It is vital to stir well when adding diluents (see below).
Brushing: Dilution may not be necessary for brush application, though for large areas it may be necessary to dilute 100 parts of Cilbond 36 with 5-15 parts ethanol or ethanol/MEK blends. This will improve the flow and speed of application.
Dipping: Dilute 100 parts Cilbond 36 with 50 to 200 parts ethanol or ethanol/MEK blends or ethanol/toluene blends for small parts requiring a dry coating thickness of 0.2 mil (5 microns).
Note: Cilbond 36 is a stable product with a long shelf-life and can be used in dip baths without special equipment to prevent moisture ingress.
Spraying: Dilution to 13-20 seconds on a DIN4 viscosity cup is normally necessary for spraying parts to produce 0.8 mil (20 microns) dry thickness. This may need dilution of 100 parts of Cilbond 36 with 20-40 parts of ethanol or other diluents listed below. A nozzle size of 0.03 – 0.05 in (0.8 – 1.2mm) and an air pressure of 14 - 36 psi (1.0 to 2.5)
bar is recommended. If cob-webbing (fibre formation) is observed, then dilute with higher boiling-point solvents, such as Cilbond 4000 Diluent, MIBK or a blend of xylene and MEK, typically at a ratio between 50:50 and 70:30.
Dilution: The recommended diluent is ethanol, though it is possible to use other alcohols, such as isopropyl alcohol and blends of alcohols as necessary. Other suitable diluents include blends of ethanol, xylene, MEK, MIBK, toluene and blends containing high boiling point glycol ether esters, such as Cilbond 4000 Diluent.
Coating thickness: For most applications a minimum dry coat thickness of 0.2 mil (5 microns) is recommended for oil seals or where the elastomer bonded is a thin layer of a few mm.
For highly oil-extended silicones and for larger components, coating thicknesses of over 0.6 mil (15 microns) may be necessary.
​​​​​​​Drying: After application, allow coatings to dry for 30 minutes at room temperature or force dry for 2 - 5 minutes at up to 140°F, taking care not to blister the coatings by drying too fast.
Pre-baking: For some applications, a pre-bake of up to 20 minutes at up to 275°F may be of benefit in improving migration resistance and wiping resistance, especially for injection moulded compounds, such as high viscosity FKM’s. A pre-bake should also be considered for difficult to bond compounds, such as some VMQ’s and particularly FVMQ’s.
Note: Cilbond 36 is a reactive bonding agent and the use of uncoated metal, glass or
ceramic containers for storage must be avoided.

Cilbond 36 is packed in in 0.26, 2.5 and 6.5 US Gallon containers as standard. 1⁄2 pint trial samples are also available upon request.