C-PRIME 215
SILICONE PRIMER FOR BONDING SILICONE SHEETS TO SUBSTRATES

C-PRIME 215 is a solvent based silicone containing compound, used to promote the adhesion of RTV silicone adhesives to a variety of substrates including metal and many plastics.

Cuming Microwave supplies C-PRIME 215 to be used with its C-BOND 255 silicone adhesive to bond silicone rubber sheets (such as C-RAM FLX, GDSS, FDSS, RGDS, and FF-2) to substrates to which a silicone adhesive normally would not adhere well

TYPICAL PROPERTIES

Color: Blue
Solids Content; 10%
Specific Gravity: 0.82
Solvent Base: Mineral Spirits
Flash Point: 390C (1020F)

INSTRUCTIONS FOR USE

All surfaces to be bonded should first be thoroughly cleaned with a suitable solvent such as naphtha or methyl ethyl ketone (MEK) to remove dirt, oil and grease. When practical, surfaces should be wiped dry before application of the primer coating.

C-PRIME 215 may be applied by brushing, wiping, or dipping. A thin uniform coat of approximately 0.01 to 0.02mm (0.5 mils) thickness usually provides the strongest bond. A drying time of 1 hour at room temperature is recommended prior to application of the RTV silicone. On porous surfaces, a second coat may be needed. Allow at least one hour between coats.

Sufficient humidity must be available for
proper drying; 50% relative humidity is recommended. Formation of a chalky white haze indicates adequate drying. Do not remove or contaminate this film prior to application of the RTV silicone.

AVAILABILITY
C-PRIME 215 is available in pint (0.95 I) and gallon (3.78 l) containers. It requires a DOT Combustible label for shipment.

Coverage will vary, but one pint covers about 5m2 (50 ft2).
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The information in this Technical Bulletin, although believed to be accurate is not to be taken as a warranty for which Cuming Microwave assumes legal responsibility, nor as permission or recommendation to practice any patented invention without license. It is offered for verification by the customer, who must make the final judgment of suitability for any application.

Document Control No. N-02-OOO-501483-3 12/5/2011