the brake caliper sent to me by Vans (part No 30-6 Parker) each has a bleed nipple in place for two left sided calipers. Trying to remove the pipe threaded nipple I began to strip the nut head. What to I need to loosen the pipe thread from the sealent that they used ? And what should I use to reseal after I place the nipple on the correct side for the right side caliper.