newtex high heat resistant tape - extreme temperature aluminum foil z-flex tape - pressure sensitive adhesive ducting, insulation, reflective heat barrier tape roll (2" x 25') newtex newtex: high heat resistant silver tape - aluminum foil z-flex tape (2 inches wide x 25 feet long). our extreme temperature tape makes the perfect temporary or long term solution for patching and protecting insulation, ducting, wiring, hoses, ventilation, or any surface that needs heat protection! durable, easy to use, and fast to apply. this is a must-have for any home owner's tool kit. made better: this is a high performance tape with a z-flex aluminum foil reflective side capable of reflecting radiant heat up to 3000°f. we don't recommend using it for direct heat, but it can withstand up to 350°f directly. it's important to note that the adhesive will burn off if exposed to high heat, so if you're using the tape as a permanent solution we recommend using hose clamps or stainless steel zip ties to hold the solution in place. these rolls are available in 1.5" x 15' or 2" x 25'. don't gamble on quality, get the best with z-flex from newtex. newtex performance materials: since 1978 we've helped provide fireproofing and heat resistant technology to homes, industries, factories, and businesses across america and around the world! no one has more experience and no one provides better support or higher quality. you're safe in our hands.