PVC primer is a chemical that is generally applied towards the joining connections between the pipes. It is very important to know what does PVC primer do and the importance of it.

A critical factor in the effectiveness of PVC primer is that after being applied, it starts an internal chemical reaction, resulting in softening of the PVC pipe, which prepares it for use with PVC cement.

Some people might suggest that Primer isn’t required to make robust PVC joints, which is incorrect. PVC primers are essential for airtight joints, and this article will explain why and how to utilize them in detail.

What Does PVC Primer Do?

First of all, we should know, what is PVC primer? PVC primer is a chemical typically applied to the connecting joints between PVC pipes to help them bond together. PVC connections are not actually “glued” together in the conventional sense; instead, the two pieces are held together by modifying their chemical components over time. 

However, while you may still be able to construct strong joints without Primer, it is critical to ensure that your joints are built to the highest possible strength standards.

Solvent cement needs a smooth surface to adhere to, and Primer does this by initiating the chemical process that softens the PVC.

As you know about the cement, PVC cement differs from conventional glue because it does not grip onto items but instead works as a connecting material in and of itself.

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Besides, the smoother the surface shell of your PVC is, the stronger it will bond to the joint it is placed in. This is how Primer contributes to your joint strength.

What Is PVC Primer Made of?

PVC primer is a material that is primarily composed of two chemical constituents: acetone and cyclohexanone. In addition to tetrahydrofuran and methyl-ethyl ketone, other compounds are used in specific formulations.

How to use PVC primer and cement?

We have already known about the PVC primer. Let’s talk about the PVC cement for a moment. PVC cement is a chemical liquid to breakdown PVC. The sections of the pipe are actually welded together as a result of this process. 

PVC cement is a specifically developed glue for PVC pipe in schedules 40 and 80. The pipe would visibly weaken and then harden as the cement cures, resulting in a more complex junction than the adjacent pipe and fittings.

It is straightforward to use PVC primer and cement to take the steps. For the Primer to work properly, the PVC surfaces have to be free from dust and grease.

If a PVC pipe stays somewhat dirty after attempting to clean it with a cotton rag, the Primer must be able to complete the job. PVC primer is available at home improvement stores and online retailers.

It is not recommended to use PVC cement before even applying PVC primer, and these are to be utilized in combination with one another.

The following is a step-by-step guide to the technique.

PVC Primer

Step: 1 Make sure the PVC pipe is cut to the proper length and that the edges of the pipe are straight. Straighten them with PVC pipe cutters if they aren’t cut squarely enough

Step: 2 Make a dry fit between the PVC pipe and the fittings to ensure that they will fit together smoothly. If required, use a cotton rag to wipe away any accumulated dirt from the tube and the fitting.

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Step: 3 Then apply the PVC primer to both the exterior and interior of both the PVC pipe and fitting. Let the Primer should dry for approximately 10 seconds.

PVC Cement

Step: 1 Apply PVC cement abundantly to the primed top of the tube and the primed area of the fitting. Allow no puddles of cement to form on the PVC substrate.

Step: 2 Assemble components as soon as possible. Slightly twist the fitting to remove any trapped air bubbles that may otherwise damage the joint. With a cotton towel, wipe away any excess cement.

Step: 3 Allow two hours for the joint to dry at 60 ° F. Colder temperatures demand more curing time before applying hydrostatic pressure to the connections.

A Helpful Tutorial You May Need!

Frequently Asked Questions (FAQs)

Do you let PVC primer dry before cement?

Absolutely not. No need to dry PVC primer before applying the cement. When you use the cement, it shouldn’t be obstructed. That’s the time when the pvc primer needs to be dry.

What does the Primer do to the PVC before gluing?

Using a primer will help soften PVC and prepare a flat finish for the dissolving cement. PVC connections are not glued together but somewhat chemically bonded together. The better it clings to your joint, the softer the PVC’s outer layer should be.

Is it necessary to use PVC primer?

PVC primer has a very important role. It helps to make your joints tighter. By the chemical reaction, it softens the PVC and provides and prepares it for the solvent cement. So, it is must necessary thing to use PVC primer


Like any industrial solvent, PVC primers may be challenging to work with and can be harsh when mistakes are made. If you don’t know how to apply PVC primer properly, mistakes and permanent errors can occur, resulting in a time-consuming clean-up or the need to replace whole sections of pipe.

Therefore, this is a vital piece for individuals concerned with the PVC primer and the PVC cement as well. This article clarifies every area of the topic, focusing on what does PVC primer do.

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