Acrylic top seam spot weaping

[CWO4GUNNER]

Home early this week to do my monthly water change on my 6 tanks. Although I have a house sitter to feed that cats, I don't allow anyone to feed or maintain my tanks for 5 days at a stretch when I am home. This means I really top my tanks off almost to the brim due to Arizona's low humidity. My 12 year old acrylic 100 tank I especially top off past the seam due to its design with a sealed top it just seems convenient to top off a tad past the top seam.

To the problem. I have been toping off my acrylic tank like this for about 2 months now and to day before starting my water chnage I noticed two spots of calcium deposits at the seam. Even though that water had already evaporated below that point deposits a a sure tale sign of a leak or weep. After the water change and refill past the seam I noted that although there is no running or visible leak, to the touch I can feel wetness.

So here is my question. Can an acrylic tank be inside sealed like a glass tank using GE Silicon I without compromising or dissolving the original seam seal between the acylic panels? Or is there a sealant that can be used that wont affect the original seal? This is a very tine spot and although I can simply maintain a water level below the top seam, it still raises concern for treatment.

Am I doing a bad thing by allowing a tip-top water line in the acrylic tank?

[Star_Rider]

Gunner

what about this:

http://www.northcoastmarines.com/acrylic_const.htm
in particular the thickened solvent acrylic cement

[CWO4GUNNER]

Gunner

what about this:

http://www.northcoastmarines.com/acrylic_const.htm
in particular the thickened solvent acrylic cement
Great site, looks like there are a few thing there I might need later, thanks.
My concern is from post I have read from others about acrylic cement and repair is that once an acrylic tank seam has been sealed at the factory, any contact with fresh cement later to repair a new leak. could result in a catastrophic seam separation/split.

So you can see what I am trying to avoid by asking if anyone with experience knows if there is an alternative sealing material (i.e. silicone) that wont chemically dissolve the the rest of the good seal making a tiny leak into a huge leak.

Has anyone successfully used a silicone sealant on the inside seam of an acrylic aquarium just like on an all glass aquarium to do a spot repair without any bad affects to the original acrylic seal seal (no dissolving)? Conversely has anyone used acrylic solvent glue to repair a spot leak on a seam seal resulting in more damage to the seam then the original leak?

[CWO4GUNNER]

Well after researching a few DIY repairs here and on other sites decided to buy the most recommended adhesive and applicator ( 4 ounces of Weld-on IPS-4 $7 and needle applicator $3, shipping $8, from eplastics.com. This stuff is supposed to be like water and be draw into any separation like water.

The irony is the bigger the bottle you buy, the cheaper the total cost. While I could have spent twice as much and got 32 ounces, what on earth would you use it on with a shelf life of only 2 years. No way I have plans to build an acrylic tank. So I spent $17 on 4 ounces even though I only need 1/2 an ounce, instead of $32 for 32 ounces Ill never use.