URETHANE ADHESIVES URETHANE

adhesives are available in one part moisture cure systems or two part 100% reactive room temperature or heat cure systems. Urethane adhesives are designed primarily for industrial usage and are not usually available to the handyperson because of high flammability and limited shelf life. The leading characteristic of urethanes is their flexibility. This adhesive is available in a wide range of viscosities from a paste to a sprayable liquid. Urethanes will bond prepared metals, plastics, wood, foam, rubber, fabrics and leathers.

USAGE:

Substrates must be free from all contaminants. Prepare surface by wiping with a solvent. Abrasion is recommended for metals and thermosets plastics. Two part urethanes require careful combining of fractional mixing ratios for specific applications. Adhesive is moisture sensitive and open containers must be capped with dry nitrogen for storing. Check with the manufacturer for specific mixing and storing guidelines.

CURING:

Adhesive needs to be applied to only one surface. Open time, and cure time will vary depending on the specific urethane used. Single part, high grab urethanes should be applied to one surface and the solvent permitted to evaporate for up to 15 minutes before bringing together the other bonding surface and the adhesive will give an almost immediate handling bond. Heat may be used on urethanes to speed curing and improve bond strength. Check with the manufacturer for heating guide lines. Clamping is necessary only if joint is subject to movement.

SELECT

Urethanes for broad area structural bonding suction. Ideal for structural wood bonding applications. foam bonding. Will give structural strength on rubbers materials requiring flexibility.