How often can we reuse the conformal coating masking boots in our process?
The number of times a masking boot, cap or plug is reusable is dependent on a number of factors including:
1. The conformal coating process
2. The complexity of the boot
3. The thickness of the wall of the boot
4. The conformal coating material used
5. How tight you require the boot to fit
The conformal coating process
If you require a tightly fitting gasket seal for processes like dipping or parylene coating you may not be able to use the boot more than 1-2 times. This is because the seal has to be perfect. But, for typical spray coating processes most boots can be reused 20-50 times. In fact, we have some boots that have never been replaced and still in use in our coating service that have probably been used over 400-500 times. They last a long time.
The complexity of the boot
The more complex the boot the more likely it will get damaged. A simple molex connector or cap box will be more durable than a three piece boot which is connected together purely down to operator handling
The thickness of the wall of the boot
All of the boots are custom made so we can vary the thickness of the walls. However, the thinner we make them the more likely they will get damaged eventually. The balance to this as that if the walls are too thick you get shadowing effects around the component and it may not fit in around tightly packed PCBs.
The conformal coating material used
Some solvents could react with the silicone boot. In reality very few do and 99% of conformal coatings are perfectly fine with the boots. But, if in doubt, check.
How tight you require the boot to fit
If you want a tight fitting boot then it makes sense that the boot will stretch with use when pulled off and pushed on. If you don’t need it tight then we can design it this way.
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