I tied to post this in the VOC Spares company forum to ask the question but it seems we are not allowed to.
The question is that does anyone have any experience of using these plungers and what is the material used that replaces the cork? I am guessing that this is not Viton
From my experience, I fitted these with a little oil and they had a nice smooth action but as soon as the petrol came in contact they began to become tight and now after a couple of weeks they are very difficult to open and require a firm grip of fingers from two hands to operate
The question is that does anyone have any experience of using these plungers and what is the material used that replaces the cork? I am guessing that this is not Viton
From my experience, I fitted these with a little oil and they had a nice smooth action but as soon as the petrol came in contact they began to become tight and now after a couple of weeks they are very difficult to open and require a firm grip of fingers from two hands to operate