I am in the process of replacing some 'T' shape profile rubber along the inerface between the cab and the coachwork. I have the Sikaflex 512 for completing the sealing. Is it absolutely essential to pretreat the surfaces with Sika Activator 205 before applying the Sikaflex 512 or could I use some cleaner like white spirit. Yes, you have guessed it, I don't have any 205 activator here in Spain. Just getting Sikaflex is a chore.... 18 euro (£15.50p)a tube, ouch.
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