will this work on binding thin pieces of acrylic together?

I used this to cement 1/8" acrylic pieces together to build several sales display cases and it worked perfectly. You must make sure the ends to be bonded are absolutely clean and smooth for the bonding to take place. Bonds fairly quickly and use sparingly as it will distort any areas where it spreads out.

Can it be use on acrylic vs tempered aquarium glass?

It is for acrilics, and some other plastics. Not glass

The junction between the needle and the lid of the applicator bottle leaks badly. What kind of "glue" will not be dissolved by the solvent?

I think that a super (or instant) glue might work. I simply gave up on the applicator bottle and use a small paintbrush with a pointed tip, and put the top of the container on loosely until I've finished. It's difficult to fill the bottle without losing a lot of the solvent anyway.

Can I use this inside of a acrylic aquarium?

Once it has cured/dried - wash , should be ok , sure the aquarium is acrylic - not just plex-i-glass?

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⚡ Bond faster, finish smarter — the clear choice for pros!

BUILT TO LAST - Waterproof formula guarantees durable, long-lasting bonds
PRECISION CONTROL - Needle applicator bottle ensures mess-free, exact application
CRYSTAL CLEAR FINISH - Invisible, clear bonding perfect for flawless acrylic joins
SET IT AND FORGET IT - Cures fully in just 24 hours for rapid project turnaround
PRO GRADE RELIABILITY - Trusted Weld-On brand for professional-quality acrylic and plastic adhesion

IPS Weld-On 3 is a fast-setting, clear acrylic plastic cement delivered in a 4 oz bottle with a precision needle applicator. Designed for professional-grade bonding, it cures fully in 24 hours and creates a waterproof, durable bond ideal for acrylic and plastic materials.

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Brand	WELD-ON
Material	Acrylic,Plastic
Compatible Material	Acrylic, Plastic
Item Form	Liquid
Color	Clear
Item Package Quantity	1
Package Information	Bottle, Can
Item Volume	118 Milliliters
Viscosity	Low
Full Cure Time	24 Hours
Water Resistance Level	Waterproof
Unit Count	4.0 Count
Manufacturer	Weldon
Item Package Dimensions L x W x H	5.71 x 4.25 x 2.68 inches
Package Weight	0.21 Kilograms
Item Dimensions LxWxH	2 x 2 x 4 inches
Brand Name	WELD-ON
Part Number	TLLPN-21847771

IPS Weld-On 3 Acrylic Plastic Cement with Weld-On Applicator Bottle with Needle, 4 oz Can, Clear

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