# Scratch on 4" Acrylic Enclosure

**URL:** <https://discuss.bluerobotics.com/t/scratch-on-4-acrylic-enclosure/3458>\
**Category:** Watertight Enclosures\
**Created:** [October 4, 2018, 3:42pm UTC](https://discuss.bluerobotics.com/t/scratch-on-4-acrylic-enclosure/3458 "2018-10-04T15:42:35Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![NIW](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/niw/32/1904_2.png) [@NIW](https://discuss.bluerobotics.com/u/NIW)\
**Post date:** [October 4, 2018, 3:42pm UTC](https://discuss.bluerobotics.com/t/scratch-on-4-acrylic-enclosure/3458/1 "2018-10-04T15:42:35Z")

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I bought a 4" enclosure for my DIY ROV a few months ago. When I was inserting my electronics into it, I had a gpio pin sticking out that scratched the inside (image of the scratch while sealed attached). I tested the enclosure with the vacuum pump up to 25hg vac. I left it in a vacuum for 1.5hrs to test the seal. It did not leak, but I don’t want to take any chances at depth.  
Do you think the scratch is a problem?  
If so, is there any way I can fix this?

 ![IMG_20180922_204229939](https://us1.discourse-cdn.com/flex019/uploads/bluerobotics/original/2X/d/d191e06863e8fa48194a381cce9d3643b26ba425.jpeg)

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**Author:** ![tciii](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/tciii/32/673_2.png) [@tciii](https://discuss.bluerobotics.com/u/tciii)\
**Post date:** [October 4, 2018, 4:44pm UTC](https://discuss.bluerobotics.com/t/scratch-on-4-acrylic-enclosure/3458/2 "2018-10-04T16:44:19Z")

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@NIW,

I had a similar occurrence with my 4 in dia WTC too.

Like you I ran a vacuum check to see if the scratch would cause a leak and it didn’t. I ran my vacuum test over a 18 hour period at 10 in. If you had no leak at 25 in, I would say that you would be safe to use the WTC as is.

However, $40 plus shipping for a new WTC is cheap compared to having to replace a complete Electronics Control Assembly.

If the scratch is not too deep, you might be able to buff it out with Meguiar’s “PlastX” which I use to periodically clean the area of the inside of the WTC where the O rings reside.

Regards,  
TCIII AVD

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**Author:** ![NIW](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/niw/32/1904_2.png) [@NIW](https://discuss.bluerobotics.com/u/NIW)\
**Post date:** [October 4, 2018, 6:23pm UTC](https://discuss.bluerobotics.com/t/scratch-on-4-acrylic-enclosure/3458/3 "2018-10-04T18:23:32Z")

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Ill give buffing it a try.

Thanks!