GS Polymers GSP 4050W

GSP 4050 PART B COMPONENT MAY SOLIDIFY AT COLDER TEMPERATURES. If this occurs, gently heat the component in a warm over set at 140 – 170° F. Gently stir the melted component. Allow the material to cool to 80 – 90°F before using.
SIDE-BY-SIDE (SBS) CARTRIDGE:
GSP 4050 is not available in Side-By-Side packaging because the parts-by-volume ratio of the system is incompatible with standard SBS cartridges. Contact our technical sales department for system recommendations if your application requires a cartridgeable system.
TO MIX BY HAND:
Mix Ratio: Parts by Weight (pbw): ................................... 16 parts GSP 4050 Part A to 100 parts GSP 4050 Part B
Pot-Life: Do not mix more than can be applied in 5 minutes. Gel time is 10 - 20 minutes but will vary depending on the mass mixed and the ambient temperature.
Mixing: Proportion out components according to the parts by weight (pbw) or parts by volume (pbv) ratio into a non-reactive container (e.g. polyethylene, polypropylene, or metal de-rimmed can). Select a container about five times larger than the volume of material mixed to allow for expansion while de-airing under vacuum. Mix components very thoroughly, preferably with a metal spatula, scraping the sides and bottom of container to incorporate all material.
De-Air: Remove air bubbles entrapped while mixing by placing mixed material in a vacuum chamber. (Vacuum should be able to achieve 29 inHg.) Liquid level should rise and then fall with some bubbling. Break vacuum partially and reapply as necessary to avoid overflow. De-air material until bubbling is minimal. Do not leave material under vacuum longer than one minute as catalysts may be stripped from the system and effect curing.
Transfer and Application: If working time allows, pour mixed material into a clean container without further scraping the sides and bottom. (In case unmixed material is still present.) Discard the residual material left behind in the mix container. If working time does not allow transfer to a clean container, dispense material taking care to avoid further scraping material from the sides and bottom of the mix container. Apply mixed material to the work area immediately.
Containers: After using materials, blanket remaining components under nitrogen gas (N2) and securely reseal the containers. This will reduce the likelihood of contamination from atmospheric moisture and extend shelf life.
CURING PROCEDURES:
Properties will develop gradually over several days of room temperature cure. Full properties develop after 7 days at ambient temperature. Cure may be accelerated with the application of heat. To heat cure the system, allow product to gel at room temperature overnight. Then apply moderate heat 85 °C (185° F) for 3 hours.

Store both Part A and Part B components between 65°F /18°C – 86°F/30°C in a clean, dry area. If stored below 68°F/ 20°C, allow the material to reach room temperature in the closed/sealed container prior to use. Both components should be blanketed with nitrogen after use to extend shelf-life and minimize moisture contamination during storage.