What kind of cement or plasti-weld are you guys using?

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Reli

Reli

Boomus Fidelis
To repair cracked cases?

Preferably something with a long shelf life, not crap like Super Glue that dries up and goes bad only a year after opening it.
 
J

jimmyjimmy19702010

Member (SA)
I use a gorilla grip super glue in a plastic bottle with a screw top lid - I've been using the same bottle for years.
The super glue is just to hold the parts together while the JB Weld dries (for case cracks, the JB weld is used internally). The JB weld comes in two parts and lasts in the individual tubes for years.

This method has provided 100% rock solid reliable repairs for my projects so far.
I
 
toshik

toshik

Member (SA)
I was under impression that in order to hold plastic glue has to dissolve its surface first.
IMHO unlike the "crazy" or even plain acetone (not practical for gluing), epoxy does not dissolve the ABS plastics most cases are made of...
I've been using crazy glue gel for years.
 
caution

caution

Member (SA)
Ha! I just finished an evening of plastic surgery. Joe's right, it's really that versatile. It's best for cracks where the sufaces match and there's no missing material, because it's just a solvent melting the surfaces back together. Doesn't take very long to set either, or to fully cure.

It's also great for dissimilar surfaces, like tonight I recreated the heat stakes that hold the battery plate on the C100F from a broken M70 top plate, dremeled/filed them to size and applied some TAP acrylic "cement" to the two surfaces, wiggled them together for a bit while the plastic was still soft to make sure the interface was 100% bonded.

If you have such huge gaps you need filler, then yeah epoxy is the way to go. Super Glue will disintegrate eventually, takes a few years but it doesn't last forever.
 
floyd

floyd

Boomus Fidelis
i only use this glue . best glue i have ever used on plastic. been using it for over 15 years and it is literally stronger than the plastic when it's dry , this stuff bonds fast and has the perfect applicator tip. i have used it on many boomboxes , my only regret is running out of glue from using so much over time lol. not cheap but this **** works!

http://www.ebay.com/itm/Testors-Model-Master-1-oz-Liquid-Plastic-Model-Cement-Glue-TES8872C-8872C-/351421720664?pt=LH_DefaultDomain_0&hash=item51d25de858
 
blu_fuz

blu_fuz

Well-Known Member
Staff member
caution said:
Ha! I just finished an evening of plastic surgery. Joe's right, it's really that versatile. It's best for cracks where the sufaces match and there's no missing material, because it's just a solvent melting the surfaces back together. Doesn't take very long to set either, or to fully cure.

It's also great for dissimilar surfaces, like tonight I recreated the heat stakes that hold the battery plate on the C100F from a broken M70 top plate, dremeled/filed them to size and applied some TAP acrylic "cement" to the two surfaces, wiggled them together for a bit while the plastic was still soft to make sure the interface was 100% bonded.

If you have such huge gaps you need filler, then yeah epoxy is the way to go. Super Glue will disintegrate eventually, takes a few years but it doesn't last forever.
Click to expand...

^ exactly!

I would still like to find a glue/epoxy to fill voids where there is material missing. Lots to choose from but never got to experiment yet.
 
blu_fuz

blu_fuz

Well-Known Member
Staff member
This is it, but not the cheapest in the link:

http://www.sears.com/ips-weld-on-4-acrylic-plastic-cement-with/p-SPM1132327914?sid=IDx20140425xECNMPHW15


$10:
http://www.ebay.com/itm/IPS-Weld-on-3-Solvent-Plexiglass-Acrylic-Glue-4-oz-/320423413417?pt=LH_DefaultDomain_0&hash=item4a9ab946a9



Apply it with these methods:
- q-tip on the mating surfaces (great for seamless repairs. The fluid even wicks into the cracks)
- dip the part (works great for snapped off screw posts, dip the broken end in the fluid and mash it back into place!)
- syringe to get it in tight places (careful squirts everywhere! AND will ruin any finish on anything!)
 
caution

caution

Member (SA)
Reli said:
Acrylic cement, you guys talking about something like this?

http://www.amazon.com/SCIGRIP-10315-Acrylic-Cement-Low-VOC/dp/B003HNFLMY
Click to expand...
Yeah. They're all mostly methylene chloride with small amounts of different things. TAP has some "tricky" (trichloroethylene) in it, that stuff is a fantastic solvent, used to use it at my first job cleaning electronics assemblies. Wouldn't be surprised if I develop cancer later in life from that stuff!
 
Cpl-Chronic

Cpl-Chronic

Member (SA)
I use JB Weld, Epoxy & super glue depending on the need....Epoxy for bonding, JB for rebuilding missing gaps & structural problems, posts etc & super glue for small repairs or spots you need a clear glue for window cracks etc.
 
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