Doesn't work and can cause cancer! How's that for a product from China?

I bought a package of this stuff in January and finally got around to opening and using it to repair sunglasses this afternoon.
Here's the review I wrote on Amazon.com:

When you see more than half of the reviewers hate a product, you should consider yourself warned.
Unfortunately, I paid attention to the hype and not the reviews.

This product not only failed to perform as advertised - in this case to repair a pair of sunglasses - but came with instructions that are downright scary.
To quote from the Instruction Guide:

"WARNING! This product contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm."
And:
"Wear safety glasses and rubber gloves
"Never look directly into the UV light. It can cause eye damage.
"Dispose of liquid material safely. DO NOT discharge into sewer or waterways.
"DO NOT allow clothing wet with material to stay in contact with skin.
"DO NOT allow wash water from cleaning or process equipment to enter drains"

I wish I'd never opened the package.