Expansion joint material absorbs expansion of construction material that is typically caused by heat. Expansion joints are often cut into concrete or asphalt at regular intervals which can prevent occasional cracks. They are often then sealed with tar or some kind of rubber. Whether you're looking to buy a concrete expansion joint, a drywall expansion joint or a rubber expansion joint you can sometimes find them through your local hardware store as well as through online vendors. If you shop online, make sure you're careful about size and material since returning joints, fillers and covers can be more of a hassle via mail.

Expansion joint material comes in a variety of forms so make sure you're shopping specifics such as:

1. Concrete expansion joints

2. Expansion joint fillers

3. Expansion joint covers

Action Steps
The best contacts and resources to help you get it done

Find expansion joint filler made specifically for concrete through specialty sites

A concrete expansion joint can probably best be found through concrete construction companies. Not only do they specialize in all concrete products, they're accustomed to helping their clients with specs. And you'll have to be very careful what you purchase since it will have to fit well into the joint.

I recommend: Right Pointe offers the ability to shop products by specification as well as a variety of expansion joint material such as rubber, fiber and asphalt. Sakrete also specializes in concrete products and a concrete joint product resistant to oil, chemicals and water absorption.

Look for a multi-purpose expansion joint filler for a variety of applications

Expansion joint filler is not only used for concrete but can also be used in drywall, gutters and decking. Finding a multi-use filler can come in handy, especially for construction companies or renovators who can handle more than one job at a time. Find something online you can use both as a concrete expansion joint filler as well as for other applications.

I recommend: W.R. Meadows, Inc., offers Deck-o-Seal, which is a convenient, removable strip filler that can be used on concrete, gutters and airport runways. Best Materials LLC sells fillers for an assortment of expansion joints.

Buy an expansion joint cover and make the surface safe

If you've taken measures to fill the joints in whatever you're working with, an expansion joint cover makes joints and fillers look less visible and can often make walking on concrete and asphalt less dangerous since it can provide a seamless surface.

I recommend: Arcat lists 18 manufacturers of expansion joint cover assemblies complete with products and specs. CS offers expansion joint covers for floors, walls, ceilings and specialty applications.

Tips & Tactics

Helpful advice for making the most of this Guide

• •  To make your expansion joint filler last longer, dig or sweep out any concrete or wood debris left in the expansion joint before filling it.
• •  Always wear goggles and ear protectors when cutting into concrete. If you're working with a gel or liquid joint filler, rubber gloves will protect your hands from chemicals.