UPass ReviewCan You Trust This Brand to Work?

u pass urine fake urine review

This UPass Synthetic Urine review was last updated in May 2024.

UPass Synthetic Urine (also known as U Pass 8.4 or You Pass) gained a lot of praise a few years ago for folks who wanted to pass a drug test. At the time, they were using well-advanced ingredients. However, in the world of drug screening, technology doesn’t stand still.

Too many fake urine products that used to work will now get you less than perfect results. And there’s an increasing number of companies enforcing mandatory workplace drug testing. We did some testing of our own for a complete UPass review.

Let’s discuss how effective UPass is in passing drug tests.

What Is UPass Synthetic Urine?

UPass Synthetic Urine is a synthetic solution that is used for the calibration of testing equipment.

Essentially, UPass Urine is a baseline product that scientists use to rest their equipment and make sure that all tests are accurate. By using such a product, you will be submitting a vial that shouldn’t be flagged as fake, thereby passing the drug test.

But does it actually do that during a drug test?

How does Upass Urine fare against a drug test?

UPass 8.4 Synthetic Urine Box with rubber band included

If you take any kind of recreational drugs, legal or illegal, then they will be picked up in a drug test.

With so many employers these days demanding that employees and applicants get tested regularly, it’s no surprise that there is a huge market for fake pee.

Upass Test did have quite a long run of being a great solution for passing a drug test in most urine testing laboratories, but recent changes in testing machinery have changed its success rate a lot.

It’s still marketed and advertised a lot, but unless you know that a urine test facility is not fully up-to-date with its testing, UPass won’t be the best or most reliable solution for a drug test. This is simply not a risk worth taking when your job and life is on the line.

What Are the Ingredients of This Drug Test?

The ingredients include creatinine, pH balance, urea, color, and odor matching real human urine, but lack uric acid, which some testing facilities may check for. This doesn’t mean that you get a urine sample with all the common everyday toxins, glucose, ketones and even a bit of DNA mixed in.

And that’s OK, because drug tests don’t test for these kinds of things. What they check for is drugs and a few common ingredients of human pee.

So, how does Upass hold up when it comes to ingredients?

Here’s what’s in it:

  • Proper creatinine levels
  • Specific gravity (more on this later)
  • pH balance
  • Urea
  • Color
  • Odor

At first glance that all looks fine, but there is a crucial piece missing, and that’s uric acid. The majority of testing facilities will do one simple test for this substance, and if it’s not in the right concentration, then the urine drug test will immediately be marked as fake.

And that’s the major downside with this fake urine product.

Let’s take a closer look at some of these ingredients.

1. Creatinine

Creatinine levels of the vial should not be below 15Mg/Kg of body weight, otherwise it will look diluted compared to real urine. Creatinine is a natural substance that is produced as damaged muscle tissue is replaced. The kidneys filter it and it’s sent out with your piss.

2. Specific Gravity and pH Balance

Upass has a pH range of about 6 to 7. This is the pH range of normal urine, and therefore any artificial product you consider buying has to have a similar level. UPass Urine claims to have a specific gravity similar to real human urine.

3. Urea

This is one of the most common substances tested for these days and is always present in urine. It baffles me how many people still buy fake pee that doesn’t have urea. It’s the most obvious sign that what you’ve submitted is fake urine.

4. Color

Normal human pee has a yellowish color and a strong odor. To avoid raising any suspicions during the drug test, UPass Urine has the right color and smell of real human urine.

What’s in the UPass Package?

testing sample


Upass  package contains one 3 oz. pack of the solution, a plastic bottle, heating pad or warmer, thermometer (used to measure the correct temperature), rubber band (used to strap the hand warmer to the UPass 8.4 bottle), and a set of instructions.

Passing a Test with UPass Fake Urine (Instructions)

  1. U Pass FailOpen the product, heat the fake piss in a microwave for 10 seconds. You want the temperature strip to show be between 94 -100 degrees Fahrenheit when submitting your sample. If it’s not within range stick it back in the microwave for another 5-10 seconds. Do not heat it for more than 10 seconds at a time. This will keep the correct temperature a closer match to actual human pee.
  2. Close the Upass bottle and shake well ensuring that the liquid has been mixed properly. If the bottle feels too warm to touch then give it time to cool down to the optimal temperature.
  3. Using the rubber band, strap the hand warmer heating pad to your UPass bottle. This hand warmer heat pad will supply the device with a heat source to keep the bottle between 94-100 degrees Fahrenheit.
  4. Before you head into take the urine drug test, make sure that the sample is between 94-100 degrees Fahrenheit by checking the temperature strip and put it into the collection cup. Put in a little less than what is in the bottle so that your piss sample is not exactly 3 ounces. This will ensure that the person-in-charge of the screening does not suspect that a pre-measured amount is being submitted. If the temperature is not warm enough you can use your body heat or warm water to bring it back up.

The product does come with instructions inside, so please make sure to read every step carefully. Always keep in mind, you will be nervous. Practice this as many times as you can, as when match day comes you won’t get a second chance.

What Additional Products Work Best with UPass Synthetic Urine?

UPass synthetic urine is designed to effectively pass a urine drug test on its own, there are additional products available to enhance its usage and ensure successful results.

  1. Synthetic Urine Belt: The synthetic urine belt kit is a highly effective accessory for concealing and delivering fake pee. It provides a discreet and convenient way to carry and dispense synthetic urine during the drug test.
  2. Leg Strap: The leg strap serves as a more affordable and less elaborate alternative to the synthetic urine belt. It consists of an adjustable band that wraps around the thigh, securely holding the fake pee in place.
  3. Heating Pads: To pass a urine drug test, it is crucial to submit a urine sample at the right temperature. Heating pads can be used to maintain the synthetic urine at the correct temperature range, ensuring it closely matches the temperature of genuine urine.
  4. Prosthetic Penis: The prosthetic penis, accompanied by a waistband and straps, offers a realistic and discreet solution for delivering synthetic urine. It provides a more authentic experience during the urine test.

Please note that the usage of these products should be done by local laws and regulations, and it is important to consider the ethical implications and potential consequences before using any fake urine brands or related accessories for a saliva test or any other drug testing method.

Does the Fake Urine Expire?

Yes, this synthetic urine does expire, and you shouldn’t trust its usefulness beyond 1 year.

The reason is that it will gradually deteriorate giving you a sample that doesn’t have the right concentration.

You should also never submit a sample to urine drug tests that you have mixed more than a few days earlier. This is because the water will evaporate and that will increase the concentration of urea.

Such simple mistakes are usually what causes people to fail these tests, rather than the product being unreliable. Always follow the fake pee instructions and don’t take any chances.

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Our Honest Review 

How Much Does It Cost? – Good

It is cheap to buy at only $18.99. You can’t complain about their sale price, but it’s not always about the price when it comes to these things.

Also, these prices can vary if you buy them from Amazon, eBay, or Craigslist if you do find them on there.

Be very careful to check the dates for any positive reviews that you find. This was a popular and reliable product until testing started to focus on uric acid as well.

If you see it for sale with a load of positive feedback, then the chances are that those reviews are more than 3 or 4 years old.

These days, it isn’t a very reliable fake pee product anymore.

Adulteration – Good

contaminated sign

The product for sale must be checked for adulteration before buying. This is highly important if you want to pass urine tests.

Adulteration means the fake pee sample has been contaminated, diluted, and tampered with.

According to research done on the use of Upass Synthetic Urine, it was indeed confirmed that this synthetic urine is free of adulteration and therefore is a safe product.

Success Rate – Poor

Upass Synthetic Urine reviews have shown that the product has had mixed results with many users complaining they failed the test. However, a larger percentage of marijuana users around the world gave positive comments and success stories after using the product in their drug tests.

About 80% of the people who have used the UPass 8.4 during their tests, posted a positive result/pass online. Keep in mind that those results are a bit older and in recent years the success rate has dropped a lot.

This may be enough guarantee for you, but it certainly isn’t enough for me.

My alternative (see below) has less than a 0.02% fail rate.

Our Official Rating:

  • Effectiveness: 3/5
  • Price: 4/5
  • Ease of use: 4.5/5

Frequently Asked Questions

What temperature should Upass be so that it can perform well?

UPass should be 94 to 100 degrees Fahrenheit so that it can perform well and increase your chances of passing the test. The reason for this range is this is the expected body temperature of human urine according to the testing facilities. 

Can you heat Upass again?

Yes, you can heat UPass again by placing it back in the microwave, but make sure you avoid doing this too often and always re-check the temperature, just like how you would with other synthetic urine products. After a couple of times of going through this process, water will evaporate and it increases the concentration of the sample. That can then be picked up as an unnatural and fake urine sample during the urine drug test.

Does UPass’s box accommodate a temperature strip?

Yes, the UPass box accommodates a temperature strip which is a vital part of the drug test preparation process. Once you get the sample up to the ideal temperature of the synthetic urine, you will need to keep it close to your body to avoid cooling. The box includes a rubber band so you can strap it on to the heating pad easily and keep it within the correct temperature range. Before you head into the test facility, double-check the strip to make sure it’s still at the right temp.

Will Upass decay?

Yes, UPass will decay over time, but the shelf life is pretty long. When you mix it and heat it at least once, it’s best to use Upass Synthetic Urine within a month as some of the water will evaporate and the chemicals can start to break down as well.

Can UPass be frozen?

Yes, the UPass fake urine solution can be frozen and reheated to the correct temperate at a later date. However, you should avoid going through this process more than once. Freezing and defrosting will slightly change the chemicals, and the more you do this, it will impact the sample more negatively.

Can UPass be purchased in stores?

No, Upass Synthetic Urine is not available in stores, and I would caution you about buying it from any non-reputable company. It is available on Amazon from time to time, but the best place to get it is directly from the manufacturer.

Does Upass smell unpleasant?

Yes, Upass does smell unpleasant, but no different to regular human piss. It’s the mixture of chemicals that gives pee the very recognizable smell, and if it didn’t smell bad, then it would easily indicate that it’s a fake sample.

Does Upass have uric acid?

No, Upass fake human urine does not contain uric acid. Real human urine contains a certain level of uric acid, hence Upass urine is most likely to be detected as fake right away.

Overall Score – Does Upass Work?

upass 8.4 grade: c minus

Upass is cheap but with many users reporting failed tests, this fake human urine isn’t worth the risk. We carried out some reviews on synthetic products and only one product really stood out from the crowd…

The number one product, with reportedly the highest pass results, is Sub Solution (read more in our dedicated Sub Solution review page on this product) or buy it directly from the official website on discount by clicking the link below where you can find the best prices for it. It has a higher than 99% pass rate for drug test procedures so your fears about losing your job should go out the window.

Hope this Upass Synthetic Urine review helped you decide on which fake urine to get for your scheduled drug testing.

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