High Temperature Application?<Click here>Sealant and ScrewsDEKS recomends using a neutral cure, low modulus silicone sealant from a reputable manufacturer. Acetyl cure silicones should not be used. One example is ASi 335. It is a high quality sealant that is neutral cure, and good to 400 deg F.•Low modulus silicone means that it is stretchy, has lots of movement•Neutral-cure silicones release alcohol when they cure and have almost no smell. (Acid-cure caulking have a vinegar smell as they cure)To secure the boot to the metal, use a 16mm self-tapping hex-head screw that comes with a rubber washer.EPDM = Ethylene propylene diene monomer (synthetic rubber)TPE = Thermoplastic Elastomer