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bitumen on top of tar varnish


jenevers

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Good. Thanks.

I was surprised, years ago, when I had some plating done, that the instructions on the bitumen tin said " paint new steel with red oxide before applying the bitumen". I was going to paint the steel with bitumen directly, which is what everyone does when they dry dock.?

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5 hours ago, jenevers said:

Good. Thanks.

I was surprised, years ago, when I had some plating done, that the instructions on the bitumen tin said " paint new steel with red oxide before applying the bitumen". I was going to paint the steel with bitumen directly, which is what everyone does when they dry dock.?

Keelblack which is a bitumen emulsion does not adhere to red oxide.

So different 'types' of bitumen are very different on what they will bond to.

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2 hours ago, Chewbacka said:

Keelblack which is a bitumen emulsion does not adhere to red oxide.

So different 'types' of bitumen are very different on what they will bond to.

Does it say that on the tin or are you speaking from experience?

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