PVC glue is commonly used in plumbing to join PVC pipes together. But if you are plumbing for a hot water line, PVC pipes might not withstand the heat and can come undone.
Special pipes called CPVC pipes are used in such cases along with CPVC glue. These two types of glue have slightly different chemical compositions and physical properties.
This discussion will go over every little detail about CPVC Vs PVC glue.
Please give it a read to know the differences between these two types of glue to choose the right one for your next plumbing job.
What is CPVC Glue?
CPVC stands for Chlorinated Polyvinyl Chloride. As you might already know, CPVC is a special kind of plastic. CPVC resin is mixed with other compounds to make CPVC glue or CPVC solvent cement.
Here is the chemical composition of CPVC glue.
- Tetrahydrofuran – 73%
- Acetone – 5%
- CPVC Resin – 17.4%
- Thickener – 2%
- Stabilizer – 2.5%
CPVC glue works as a chemical weld, unlike regular adhesives connecting pipe pieces together. Once you connect two pieces of CPVC pipes using this glue, the compounds bond together to make a single piece.
Stabilizers and thickeners help increase the strength of the bond, so CPVC glue is very durable. It is also heat-resistant and can withstand a good load of pressure once fully cured.
Depending on the size of the pipes and fittings, ambient temperature, and humidity, CPVC glue takes about two days to set and cure completely.
Advantages of Using CPVC Glue
- When working with CPVC pipes and fittings, using CPVC glue is a must. It creates a strong bond between pipes and fittings to give a durable plumbing solution.
- CPVC glue can withstand more heat and pressure, so the water supply system of your house will be durable for years to come.
What is PVC Glue?
- Tetrahydrofuran – 15%
- Cyclohexanone – 25%
- Methyl Ethyl Ketone – 16%
- Acetone – 30%
- Polyvinyl Chloride Resin – 12%
- Silica – 2.5%
- Thickener – 0.03%
PVC glue is commonly used for joining PVC pipes and fittings. It can join pipes and fittings by creating a chemical reaction between them. Due to this, the process is also called cold welding.
The final joint becomes very hard and durable with PVC glue. But it can’t withstand much temperature, hence not suitable for hot water systems. PVC glue takes about 30 minutes to dry. It will require 24 more hours to cure completely.
Advantages of Using PVC Glue
- Using PVC pipes and fittings are more common in plumbing. PVC glue is a convenient and affordable solution for joining PVC pipes and fittings.
- PVC glue creates strong and durable bonds that can withstand a good amount of pressure.
- It dries quickly, so the joints become safe to touch much faster. You need to spare the curing time, though.
CPVC Vs PVC Glue: What’s the Actual Difference?
Now that you know the basic properties of these two types of glue, let’s compare PVC Glue -VS- CVPC Glue in terms of crucial features.
As you have already seen, these glues have a slightly different chemical composition. PVC glue contains Cyclohexanone, while CPVC has no Cyclohexanone in it. The amount of thickener is greater in CPVC, so it creates stronger and more dense joints.
The main difference between these glues is in their usage. CPVC glue is formulated to be used with CPVC pipes and fittings only. Though you can use CPVC glue on PVC pipes and fittings, it is suggested you use it on CPVC material only.
On the other hand, PVC glue is suitable for use on PVC pipes and fittings only. You can join CPVC pipes and fittings with PVC glue, but the bond won’t be as durable as it should be.
There isn’t much difference in the strength of these glues. Both of them create ultra-strong bonds with respective materials. As CPVC glue is more heat resistant than PVC glue, it will sustain hot water lines better.
PVC glue can become ineffective after constantly facing hot water flow for a long time.
Cleaning glue residue while plumbing is a big issue. Fortunately, both types of glue can be easily cleaned with solvents like Acetone. They get dissolved in Acetone easily so that you can wipe off the excess glue.
Both of these glues are very toxic. Chemical compounds used in these glues might create irritation or burn on your skin. If they come in contact with your eyes, the effects can be more brutal.
Inhaling the fumes can be toxic if you heat the glue, pipe, or fittings.
Which One Is for Me?
Still, confused about which one to choose between PVC glue vs CPVC? Learn our verdict. It totally depends on your purpose and what pipe fittings you are using.
PVC glue will be good enough if you are plumbing for a regular water system using PVC pipe fittings. But if you are working with a hot water line, PVC pipes might not withstand the heat for long.
You need to use CPVC pipes in that case. CPVC glue is a must for such pipes to ensure the system keeps working even under high-temperature conditions. So, know your purposes to determine which glue to use.
NOTE: Here are the top 10 lists of Pipe Thread sealants for PVC & CPVC That you can check out.
Before we draw the curtain, let us warn you about one thing. As these glues work quite similarly, people often confuse between CPVC Vs PVC Glue and apply the wrong glue without understanding the effects.
But a wise plumber would never do that. As we have focused on every little detail of these glues, including their chemical composition and advantages, you can easily choose the right glue for your projects.
Remember one simple rule here, “PVC is for PVC, CPVC is for CPVC.” Stick to this rule to create strong and sustainable pipe joints.
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