immjediately prior to use a quantithy of "vulcabond" TX is added to the adhesive and the solution stirred thoroughly until homogeneous. the proprtion of "vulcabond" TX to be used depends to a great extent on the degree of adhesion required, the pot life that can be tolerated, and other factors relating to the ambient conditions in which the systems are to be used. generally however dosages in the range of 5-15 parts of "vulcabond" TX per hundred of rubber are found to be suitable. the adhesive solution containing the isocyanate is applied to the cleaned, and where appropriate, abraded surfaces and the solvent allowed to evaporate completely. on porous surfaces a second coating of the adhesive may be applied and again allowed to dry completely. the adhesive film is finally activated under an infra-red heater for 25-40 s before bringing the treated materials into contact with each other. the bonded substrates are generally allowed to mature for 48 h at room temperature before subjecting them to a
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