Whats a good sealant for acrylic reservoir

Can someone tell me what's a good sealant to put around the fittings for the reservoir.
These are stainless steel thru-hull 5/8" barb fitting for boats I'm going to use for my intakes for the pump

I would recommend using some clear silicon RTV. Decently cheap and can do a lot of other things as well. Use it at work and its worth the 3-4 bucks. Should be able to find it in any home improvement or automotive store.

exp:http://www.walmart.com/ip/Permatex-Clear-RTV-Silicone-Adhesive-Sealant/16879903

Hope they are the standard G1/4 threaded for water cooling gear.

ok I'll use that for he threads around my fittings. How about something to put between the bottom & sides of the acrylic pieces when they make contact between each other some sort of glue would be good or silicon too? I'd like to just brush something along that surface. Where they meet at in the corners or cracks I'll be using this acrylic weld- on for bonding.

not those fittings. there the NPT type of threading I'm using just using on the reservoir to connect to the pumps only. everything else is the G1/4 1/2 tubing. Doesn't seem like anybody makes a 5/8 id fitting for water cooling. I'd have to be a G3/8 type treading

Koolance does G1/4 bulkhead fittings

http://koolance.com/index.php?route=product/category&path=62_36

PS: B&Q carries bulkhead/tank fittings also.. check out the plumbing section in your local diy or just use http://www.plumbingsupply.com/bulkhead.html




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yea I just received my dozen ADT-XFTKI for the reservoir I ordered from koolance the threading is too short to put the nut on. Is there any way to make them longer? The acrylic is 3/4 inch think. Who knows what type of threading these are there's no specs anywhere I can find on these any suggestions?

3/4" acryl??? what are you using? a 200 gallon tank?

Not sure what it'll hold wise but the measurements 10.25x9.75x18 inches. I guess its around 1.5 gallons. Now I just found out from the Fastenal store about those fittings. It is an M14 with 2.0 threading with 14mm in thread length. The hex nut that come with it is 9.6mm height & the washer is 1.4mm wide now that only has 3mm left over for the thickness of acrylic left between the flange & nut. I heard of jam nuts to use instead with a height of only 7mm. doesn't anyone make them a bit smaller like 3.2mm to 6mm in the height? Gonna have to do some drilling to widen this for the nut at a depth of like 10mm or so. Sure would be nice if someone made those G1/4 thread longer length wise.

the dimensions you gave puts it on par with a (small) loft/poly tank, a bit like these...
http://www.diy.com/nav/fix/plumbing-central-heating/water-tanks-cylinders
or maybe rather a smallish aquarium ... but at 3/4" thickness ??? for those dimensions.. thats overkill.. where did you source that res?

Makes me think of some leftover StarTrek Voyage Home stuff
http://en.wikipedia.org/wiki/List_of_Star_Trek_materials#Transparent_aluminum

It sounds like he's making his own reservoir. I agree though, that sounds overly thick for the acrylic.