a 150/400 watt gun makes soldering much easier, but if you hold it on a screw thats used red loc-tite it melts the adhesive if you hold the solder gun on the screw head for 1-2 minutes

BTW red loc-tite is a thermally sensitive bonding agent,
if you need to remove scope mount screws, or any screw locked in place with this thread binding agent, that were locked in place with red loc-tite simply hold a high wattage soldering iron firmly against the screw head for at least 2 minutes before you try to remove it, this allows heat to travel through the screw and melt the bonding plastic based locking agent