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EPDXY WINTER WARNING FOR COLD WEATHER AT 50 ° F DEGREES OR LESS : OBSERVE AND FOLLOW THE WARNINGS BELOW NOTE : THESE GUIDELINES ARE NOT FOR BRAVO ' S LAMINATING RESIN Bravo bonding epoxies and epoxy- based slurries require a specific temperature range to properly cure and result in the best bond strength . In lower temperatures , you must apply and maintain adequate heat per the supplied cure chart to both the epoxy materials , containment sumps and entry fittings ( if Bravo fiberglass type ) to allow a full cure time . Failing to keep all bonding surfaces clean of contamination or failure to allow a full cure time may cause the epoxy bond to fail . In the case with Bravo Epoxy, there is no danger in applying it thick or heavy. The generous amount of epoxy required to gap-fill voids inherent in Retrofit entry fittings , or in the case of Epoxy Slurry pour joints on containment sumps such as the B-7000 or B-407 series there is very little loss of bond strength when our epoxy is applied or poured as a thick mass or volume . UTI N ACRITICAL Ambient Temp . ( F °) Work Time Cure Time ACALESS THAN 600 WARM EPDXY TO 70° Follow safety regulations and procedures including using 60 ° F ( 16 °c) 45 min 6 hours intrinsically safe non -sparking devices and equipment . 70 ° F (21 °C) 30 min 3 hours Clean work areas of fuel and flammable materials , wear 80 ° F (27 ° C) 25 min 2 . 5 hours required PPE ( Personal Protective Equipment) ventilate 90 ° F (32 ° C) 15 min 2 hours fumes and monitor LEL levels in confined spaces . MORE THAN 90° CHILL EPDXY TO 70° Follow these guidelines during cold weather to successfully bond your Bravo products : A ) Pre - heating components in cold weather is critical , Heat soak the following components accordingly and devise a safe way to maintain an ambient temperature per the cure chart above : > Pre - heat the sump wall to no more than 150 ° F > Pre - heat each Bravo fiberglass fitting thoroughly to 150 ° F > Pre - heat the epoxy or EP -slurry to ~ 80 ° F. DO NOT HEAT THE CATALYSTII B ) Do not adjust , move , shift or otherwise disturb the sump , fittings or piping while it cures . C ) You must ensure a full temperature/time cure before testing your Bravo products . Refer to the cure chart on your epoxy container. D ) You can test the hardness of the cured epoxy by pressing a blunt instrument into the surface , such as a ball point pen or screwdriver. It should not be soft or indent if it is fully cured . The methods used to initially heat containment sumps , fiberglass entry fittings , piping , epoxy materials and also maintain such heat are up to the installing contractor. Common tools and techniques are permitted by Bravo as long as they do not create a safety concern or violate any worker safety or environmental regulations . If heat is applied to a sump interior, it must be loosely capped so the heat can be properly maintained . If heat packs or blankets must be used , they should be insulated against contact with the ambient air whether there is a wind or not .