SUPER BLOCK UNIVERSAL BLUE is a general purpose product with excellent resistance against chemicals. Particularly suitable for applications on less active substrates such as stainless steel and plated surfaces where disassembly with hand tools is required. Controlled lubricity for accurate clamp forces. Prevents loosening and leakage from shock and vibration on nuts and bolts. Approved according to DIN EN 751-1 (DVGW). Not permitted for domestic gas house installations according to the German TRGI 86 / 96. SUPER BLOCK STRONG RED is high strength thread locker for use on all metal fasteners (including stainless steel and those with protective coatings such as zinc) where regular removal is not required. Excellent for securing fasteners that must withstand heavy shock, vibration, or extreme chemical or environment conditions. Recommended for permanently locking studs on engine blocks and pump housings. The product has special lubricating qualities for use on fasteners “as received” for easy assembly and good coefficient of friction for accurate clamp forces.