How do I install this product?

Application
Follow these instructions carefully for maximum effectiveness. Be sure to wear protective safety glasses and Chemical Resistant Gloves.  

Surface Preparation…Remove foreign substances, incompressibles and free water from joint opening. For proper adhesion, joints must be clean and dry. Dust, dirt and laitance should be removed prior to application. Concrete should be completely cured, free from all foreign materials and contamination from curing agents. (Industry accepted standard for curing concrete is 28 days). To maintain cleanliness around the joint to be sealed, apply masking tape 2" wide to the surfaces adjoining both sides of the joint before applying the Deck-O-Seal product or the primer (if required).  

Priming… Only required for submerged underwater joints and/or joints over 1" in width.   In other cases, Deck-O-Seal adheres well to unprimed concrete.

Joint Sizes… Proper joint design practices and application techniques must be followed for successful performance.   Deck-O-Foam or Backer Rod may be used as a joint backing material to control sealant depth and provide proper joint configuration.

Exceptions... A 2:1 width-to-depth ratio should be maintained. However, in no case should joint sealant depth be less than 1/4" or in joints less than 1/4" (6.35mm) wide. It is also not recommended in joints over one-inch in width, because of the long curing time.

Mixing… Deck-O-Seal is supplied in pre-measured kits with a ratio of setting agent to base, which must be maintained. Store and mix in a cool, shaded area. Do not mix until ready to use. (Product cannot be re-sealed for future use). 

De-rim both cans with a can opener. Care must be taken to ensure that all the setting agent is thoroughly blended with the base component. A slow-speed drill can be used. Pour the setting agent into the base and mix slowly until a uniform color is obtained; a minimum of 10 minutes is recommended.  Avoid trapping air in the sealant. To aid in proper mixing, scrape material from the sides and bottom of the container.

Application Method... At 77°F (25°C) and 30% relative humidity, the application life is approximately one hour. Apply thoroughly blended material with supplied squeeze bottle, caulking gun or any other suitable applicator. Be sure to remove masking tape from both sides of the joint before the sealant starts to set. Deck-O-Seal will set firm and rubbery within 24 hours at 77°F. At lower temperatures, curing time may take longer. NOTE: Do not apply paint over surfaces sealed with Deck-O-Seal products. 

Clean-up… Application equipment should be cleaned promptly with Xylene or Toluene.

Precautions
Deck-O-Seal is not compatible with asphalt and cannot be used in asphalt concrete pavement or with asphalt-impregnated expansion joint fillers.

This material last updated October  2003.

Deck-O-Seal Support Media

Use this Foam Material to put into the joint before pouring with the Deck-O-Seal for a uniform pour.   This is especially helpful in wider joints.  The goal is to reduce the amount of Deck-O-Seal expansion joint filler that you will need to purchase.