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Old 02-05-2022, 11:22 PM   #1
aussie merc
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Default stripping running boards PT2

well that was fun burnt out my old heat gun so had to wait till this morning to buy a new one [over 10 years old so cant complain] to my surprise low and behold lots and lots of1/8th holes guess they are vents for the vulcanising process now heres the question do i weld them up or leave alone last thing i want is an air bubble trapped under the new cover when it gets glued on your thoughts
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Old 02-06-2022, 01:20 AM   #2
V8COOPMAN
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Default Re: stripping running boards PT2

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Originally Posted by aussie merc View Post
well that was fun burnt out my old heat gun so had to wait till this morning to buy a new one [over 10 years old so cant complain] to my surprise low and behold lots and lots of1/8th holes guess they are vents for the vulcanising process now heres the question do i weld them up or leave alone last thing i want is an air bubble trapped under the new cover when it gets glued on your thoughts
Those holes are going to give those air bubbles a place to escape through, BEFORE they become TRAPPED air bubbles. DD
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Old 02-06-2022, 02:00 AM   #3
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Default Re: stripping running boards PT2

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Those holes were indeed an important part of the vulcanizing process. Raw rubber was laid on the boards, compressed by a patterned die, heat/pressure bonded to the steel during cure, causing excess rubber to ooze through the holes.
Years later, a reproduction vulcanization was attempted by one of our well known suppliers, apparently with the use of preformed rubber, vacuum bagged, and cured in an autoclave. The boards turned out very well, with the unfortunate exception of those holes becoming sinkholes in the rubber. I do not know the next chapter in that venture, but I imagine either the problem was corrected or the project abandoned.
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