What do you use to seal off areas while blasting

Looking for ideas for sealing areas off while sand blasting my b I have it all apart and don't really care to have sand in the crank case and other areas what's your guys perference to seal them off I was thinking siliconing plexiglass over them but is there any better ways
 
(quoted from post at 17:55:22 03/20/18) If you are careful you can just use masking tape. It wouldn't take much to burn through the tape so those areas you skip.




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I would put on one wrap of blue painters tape, and then go around it a few times with the cheaper masking tape.
 
I am not so confident as others are. Anything that can't be taken off and is lubricated doesn't get blasted when I do stuff. I just won't risk a little sand in a bearing or Babbitt. Yes it does take a little longer to strip the paint, but I don't have to worry about sand. Did I say nothing to worry about when no same is involved with critical stuff?
 
I'd remove paint with cheap spray-on oven cleaner then wire brush with an aggressive twisted wire brush. Leave the sand blasting for things like wheels, rims, things without oil filled gearboxes.

I did have good luck sealing front wheels or hubs with two plywood disks held in place with a long carriage bolt or threaded rod. I tightened the bolts so there was an impression of the sealing area in the plywood. I used no rtv, etc.
 

I have not done this, but I was thinking awhile back of what I would do. I would use duct tape, and then I would go around the edges of the duct tape with silicone seal. This would be to protect a shaft and seal. To take the place of an oil pan or manifold I would cut a piece of wood and drill holes for the bolts/studs, then use larger washers and tighten it down good.
 
Talking about sand blasting and sealing off. All I will say is sand will still get everywhere. Sandblasting is for completely disassembled items only.
 
Well I sealed what I could off with plexiglass and right stuff like the crank case it is fully dissasembled but I still really don't want sand in there I covered everything else I don't want sand on with duck tape so now it's just a waiting game for the right humidity and weather then it will get blasted and primed thank you all for the replies
 
The answer will vary depending on just what you are using to blast it. Type of media but more importantly, what size and pressure sand blaster. I did my whole tractor with a small 80# blaster with 70 # air pressure. Workd great and didn't tear up tape or get in anywhere. NOW!!! if you are going to haul it down to the local 'tank blaster" who uses a 6cyl diesel compressor that is meant for construction / oil field work....you probably better not even do it. They don't give a damn about anything and time is $$$$ and they turn it up and blast by the clock. Nothing will seal THEIR sand out.
 
Good to know I have Eastwood's master blaster with the dual tank I don't figure I will be blasting with lots of air I only have 22 cfm compressor so I will be on the low side on air pressure I have time yet before it gets blasted or cleaned off I want to do it outside and we are going to get some nasty weather here today and tomorrow so I have been waiting for the humidity and temp to be better so I can spray it right after I'm using 40-80 black beauty I think it's called from tsc
 
you should have no problem. My comp is 20 cfm and I'm probably only at 70-80 lb at blaster and with small tip. With the prep you describe, you're good to go. Common sense goes a long way.
 

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