Is Tenex 7r available any more? If not what is the best replacement?
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There are several brands now of plastic solvent cement.
We (LHS) have pretty much given up on Hebco, purveyors of TENAX 7r. Sent an email to the address on the bottle.....no response. Our key distributors of the same have had no better response, no further answers.
One of our better model builders, rather particular and entrenched in technique and tool, has decreed through trial-and-error that MicroMark's Same Stuff ...
...does as well as can be expected as a substitute. Ergo, we keep it in stock....reordering about monthly, as it grows in popularity!
I tend to wonder whether regulations, legal fees, liability insurance, premium shipping expenses, etc., etc., and other 'necessary evils' of the chemical products industries....especially the smaller guys/portfolios...has some not-so-small role in their demise. I mean, it only gets more onerous over time. We (LHS) still get requests for ye olde Ambroid-in-the-tube....remember that, fellow old pharts? Now gone forever.
KD
Orkybrown:
Tenex 7r claim to fame was an almost instant bond. I have not tried Same Stuff so can not comment on it. I routinely use Plastruct Bondene and Plastic Weld. Bondene is used where both plastics are the same type and Plastic Weld for dissimilar plastic. The bondene takes about 15 seconds and the Plastic Weld about 25 seconds. If the bottle cap is kept open for an extended period Bondene will tend to evaporate. Plastic Weld tends to thicken. I have heard of builders who add slivers of plastic to a Bondene bottle to make it more of a gap filler. Others use either Bondene, Plastic Weld or any other solvent cement then follow up with baking soda and CA glue to fill in a gap. For small gaps I add more solvent cement and push in plastic slivers (they will melt into the gap). For larger gaps the baking soda approach works well. For really big gaps Squadron White putty but you need to sand this material back down.
Joe
KD thanks for the link. There is a seller on the auction site that shall not be named who also offers a replacement but at a higher price.
I had a chemist at work analyze Tenax 7R and found it was Methylene Chloride and second compound. I will have to check my notes what the 2nd ingredient is but it does make it much more effective than methylene choride alone.
Methylene Cholride is very inexpensive. A liter is about the same cost as a single bottle of Tenax.
Pete
