Loctite SI 5699 Grey RTV Silicone

1. Clean and dry the surfaces. Scrape away all old gasket residue using a plastic scraper so you do not gouge the metal. Wipe both flanges clean with a solvent such as isopropyl alcohol or a dedicated cleaner, then allow them to dry completely. 2. Prepare the nozzle. Remove the cap, puncture the inner foil seal (if using a tube), and trim the plastic nozzle tip at a 45-degree angle to match your desired bead width (typically 1.5 mm to 6 mm). 3. Apply a continuous bead. Extrude an unbroken, uniform bead onto one flange surface. Be sure to completely encircle all bolt holes to prevent oil or coolant from wicking past the threads. 4. Assemble immediately. Press the mating parts together within 5 to 10 minutes before the silicone skins over. Avoid sliding the parts around once they make contact, as this can smear or break the bead. 5. Tighten fasteners. Torque the bolts to the manufacturer’s specifications. Do not over-tighten to the point that all the silicone squeezes out of the joint. 6. Clean excess and cure. Wipe away any excess squeezed-out silicone immediately with a dry cloth or paper towel. Allow 24 hours for a full cure before refilling the assembly with oil, coolant, or putting it under pressure.