5 Acoustical Sealant Application Tips

A wall with acoustical sealant.

There are several important tips to consider in applying acoustical sealant. It is vital that you take note of this information because this will be the basis of good and strong adhesion of the sealant to the walls. Below are valuable guidelines that you should remember when applying an acoustical sealant.

Clean the Surface Where the Sealant will Be Applied

Before applying the sealant, clean the area and make sure that it has no dust, oil, or any other loose materials to inhibit good adhesion. It’s best to inform the people around the area beforehand that you will need the room unoccupied for a couple of hours just to be sure that no dust or anything will come in contact, especially when you have already started applying the sealant.

Understand the Proper Way of Applying the Sealant

When applying the sealant, always hold it at a 45-degree angle. And when you are close to finishing applying the bead, gently reduce pressure from the tube before you let go of the trigger. Also keep in mind that it is advised to apply 600-900mm of sealant at a time to give you enough time to mend it before it dries.

Cover the Area for 24 Hours

After applying the sealant, cover it with anything to keep dust or any small materials that may get in contact of the sealant when in the process of drying. Putting up a sign at the door so that someone unaware of what is happening does not enter the room and ruin a day’s worth of effort, not to mention the money it will cost to buy additional sealants.

Apply Flexible Sealant at the Joints Where Drywall Meets the Floor

In the application of sealant at the joints, use flexible sealants to allow air to inhibit movements and provide a buffer for the possible vibration, both contributing to the sound transmission. This is an important factor in successfully making a soundproof room.

Tool the Bead to Ensure Good Adhesion

Tooling is a process of smoothing out the entire bead of sealant so as to strengthen the adhesion of the sealant to the joint. If in the process of tooling, a mistake has been made, immediately clean it up with water or any solvent applicable because sealants are very hard to remove, especially when dry.

When you want to seal gaps in acoustic structures it is essential that the sealant used does not go off hard. The sealant must be flexible enough to provide a good seal as well as accommodate joint movement which is likely to occur over time. Failure to use a suitable sealant will seriously compromise the performance. Many sealants simply do not provide enough elasticity for acoustic purposes, especially intumescent versions which expand with heat. When in doubt, it is always good to ask for help or advice from trained professionals.