Fastflex™ is a closed-cell polyethylene foam isolation joint and expansion joint filler used in concrete construction.

The convenient, pre-perforated tear-off strip incorporated into the product makes it easy to create a void when using cold-applied sealants. Fastflex is particularly ideal for isolation joints accommodating different horizontal and vertical movement between the pavement and a structure.

Applications

Fastflex (formerly branded as Isoflex) extends the service life of concrete by acting as an insulator in isolation joints and expansion joints while acting as a bond-breaker for sealants.

Fastflex is an ideal choice for concrete isolation joint filler applications around footings, foundations, structures, and curved or round bases and posts.  Typical projects include walkways, parking decks, curbs and gutters, concrete slabs, swimming pools,  and driveways.

This product is a closed-cell polyethylene foam joint filler and is available in continuous lengths in wall thicknesses of 3/8” and 1/2″ and widths from 1” through 6”.

FastflexTM is a closed-cell polyethylene foam expansion

joint filler used in concrete construction. The convenient
tear-off strip incorporated into the product makes it easy to create a void when using cold-applied sealants. Fastflex is particularly ideal for isolation joints accommodating different horizontal and vertical movement between the pavement and a structure.

PERFORMANCE

FEATURES
• Natural bond breaker • Lightweight
• Water resistant
• UV resistant
• Easy to use
• Used with cold-applied sealants • Clean product
• Inert
• Recyclable
• Reusable
• Made in USA
Specification Compliance
• Meets all requirements of the 1990 Clean Air Act
• Is a “Domestic End Product” as defined in Buy American Act, Title 41 USC 10
• Meets ASTM D 7174
• Meets ASTM D 5249 Type 2

Fastflex extends the service life of concrete by acting as an insulator in isolation and expansion joints, while acting as a bond-breaker for sealants. Fastflex is an ideal choice for concrete joint filler applications around footings, foundations, structures and curved or round bases and posts. Typical projects include walkways, parking decks, curbs and gutters, concrete slabs, swimming pools and driveways.

INSTALLATION
Prior to installing Fastflex, the joints should be cleaned per the sealant manufacturer’s recommendations. Thoroughly remove any concrete form-release agents, curing compound residue, laitance or any foreign materials. To ensure a good sealant bond, joints must be clean and dry when the new sealant is installed. Air compressors used for this purpose must be equipped with traps for removal of oil and moisture. When cold- applied sealants are required, the 1/2” tear-off strip can be removed to help control the amount of sealant required. Install Fastflex at the depth recommended by the sealant manufacturer with a blunt tool.
Care should be taken not to puncture or over-compress or stretch Fastflex during installation. Fastflex is not meant to be used with hot-pour sealants. Sealant compatibility should be confirmed by the sealant manufacturer. Compatibility characteristics of sealants in contact with sealant backings can be determined by ASTM C 1087 test method.