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Seal and protect

Mastic sealants: No more gaps!

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Flexible mastic sealants are a great all-purpose solution to fill the gaps in your home DIY projects. No matter what project you are working on, if you need a flexible sealant to bond to all common materials, mastic sealants will do the job. Read on to find out how.

Seal any project with mastic sealants

There are countless projects around the home that require a strong and flexible seal, such as shower seals, ductwork seams, and faucets. Silicone mastic sealants are waterproof and durable, creating a long lasting, flexible bond between materials. Whether you are working on windows or countertops, mastic sealants are the perfect solution.

This type of sealant is ideal for closing gaps in areas that need to withstand some movement yet require a durable seal—like shower walls, ductwork, and windows. A quality mastic duct sealant will cure and remain flexible to accommodate for shifts in temperature and minor movements.

A hand cuts off the tip of a cartridge.
Before you start sealing, you must first cut off the tip of the cartridge

How to work with mastic sealants

Learning how to use mastic sealants will help you complete any construction project that needs a finishing touch with a flexible seal.

1. Getting started: You want to be sure that any surface you are going to caulk or seal is in place. Have all items you need lined up properly, the caulking area has to be clean.

2. Safety Precautions: Like with all strong adhesives, you want to be safe: wear gloves, use the proper tools, and wash up when finished.

3. Application: Make sure you have the proper caulking gun to apply your mastic sealant. Cut the nozzle as per the manufacturer's instructions and apply to the areas you need to seal. Apply only as much sealant as is necessary to fill the gaps. Wash any spilled sealant away quickly with soap and water before it has a chance to cure. 

    4. Completion: Once your DIY project is complete, put your tools and tubes of sealant away safely as per the manufacturer’s instructions. If there is sealant on your tools, wash them immediately in soap and water before storing them.

    Two hands seal a bathtub; the edges are taped.
    To apply the mastic sealant cleanly, it is advisable to mask the edges

    Choosing the right mastic sealant for the job

    Choosing the right mastic sealant depends on the project you are tackling. Will you be sealing in an area prone to moisture? Will the sealant need to be painted?

    If you need a sealant for a variety of purposes, then the Loctite Polyseamseal all-purpose adhesive caulk is what you want. This product by Loctite is the perfect solution for many projects as it is waterproof, mold and mildew resistant, paintable, and long lasting.

    When working on tiles in the bathroom or the kitchen, look for a sealant that can withstand varying temperatures and humidity levels. Loctite has a great product specifically formulated for these conditions. Loctite Polyseamseal Tub and Tile Adhesive Caulk is an acrylic based sealant that remains flexible and watertight. It is paintable and can be easily cleaned with soap and water.

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    Products used

    • loctite polyseamseal all purpose clear 10oz cartridge
      Loctite Polyseamseal All Purpose

      Provides a durable bond and seal for general sealing projects.

    • loctite polyseamseal tub tile white 10oz cartridge
      Loctite Polyseamseal Tub & Tile

      Provides a durable bond and seal for kitchen & bath projects.

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