Dos and Don'ts of Working with Silicone Sealants

Silicone sealants are a staple in many industrial and even domestic settings due to their versatility and durability. However, mastering the art of using these adhesives requires a keen understanding of their unique properties and the specific practices that enhance their performance. Here's a comprehensive guide on the dos and don'ts of working with silicone sealants.

Dos of Using Silicone Adhesives and Sealants

Use a Primer Whenever Possible

Primers are invaluable tools in the world of adhesives. They improve the adhesion of sealants to surfaces by up to 20%. Despite their short shelf life, the benefits they offer in terms of bond strength are well worth the investment. Solvent-based primers, applied with a brush or cloth, can significantly enhance the durability of your seal.

Consider the Shelf Life

Silicone sealants have a curing rate of 2-3mm per 24 hours, which means they are not designed to last indefinitely in their containers. The shelf life is particularly short in hot and humid conditions. To extend their usability, store them in a refrigerator and always keep the nozzles attached to prevent premature curing.

Prep Your Workspace

Safety and cleanliness are paramount when working with silicone sealants. Ensure that your applicator tools are kept out of reach of children and pets. Choose a well-ventilated area for your work to minimize exposure to any odors that may be emitted by the adhesive.

Don'ts of Using Silicone Adhesives and Sealants

Not Choosing the Right Adhesive

Before selecting a silicone adhesive or sealant for your project, it's crucial to consider the materials you're working with. There are specific adhesives designed for certain materials. Ensure you choose the appropriate silicone for your project to avoid ineffective bonding.

Not Checking the Expiration Date

Overlooking the expiration date of your silicone sealant can lead to subpar results. Sealants that are past their prime take longer to dry and lose their potency. Always check the date before application to ensure optimal performance.

Not Cleaning the Surface

A clean surface is essential for a strong bond. Grime, oil, grease, or other residues can prevent the sealant from adhering properly. Thoroughly clean the surfaces and allow them to dry before applying the sealant.

Not Following Instructions

Each type of sealant comes with specific instructions, particularly regarding drying times and potential mixing requirements. Ignoring these instructions can lead to improper application and weaker bonds. Always read and adhere to the manufacturer's guidelines.

Not Using Pressure

Applying adhesive to metal surfaces and expecting it to bond without additional pressure is a common mistake. Unlike paper, metal requires firm pressure to ensure a strong bond. Use a vise or clamp to hold pieces together while the adhesive sets, allowing ample time for a robust bond to form.

Advanced Tips for Working with Silicone Sealants

An Easy Way to Remove Sealant

If you ever need to remove sealant, understand that there is no miracle substance that can dissolve it. Mechanical methods, such as using a cheese wire, sharp knife, or sander, are the only effective ways to remove cured sealant.

Choosing the Right Sealant for Industrial Applications

For industrial applications like engines, oil pans, and transmissions, RTV silicone is recommended. For a general purpose, durable sealant suitable for a wide range of applications, including non-porous surfaces like glass and metals, window silicone sealant is an excellent choice. For substrates like aluminum, brass, steel, mortar, granite, marble, wood, and many plastics, polymer-modified urethane sealant offers superior performance.

Whether you're gearing up to apply your silicone sealant or have questions you'd like to discuss with a product specialist, don't hesitate to reach out. Our expert team is eager to assist you through the purchasing process and answer any queries you may have.