|Resistance class per DIN EN 1627||Break-in time required||Entry method|
|RC 1 N||3 minutes or less||Basic protection against attempted forced entry with physical violence, such as kicking, ramming, or attempting to the casement out. No tools used.|
|RC 2 N||3 minutes||Tools such as screwdriver, pliers or crowbar are used to force open a window or door|
|RC 2||3 minutes||Simple tools such as screwdrivers, pliers and crowbars used to break open a closed and locked window or door|
|RC 3||at least 5 minutes||Burglar uses a second screwdriver and a crowbar to break open a closed door or window|
|RC 4||at least 10 minutes||Burglar uses sawing and hammering tools as well, such as axes, chisels, hammers and battery-operated drills|
|RC 5||at least 15 minutes||Burglar uses high-performance power tools as well, such as drills, sabre saws and grinders to open a locked window or door|
|RC 6||at least 20 minutes||Use of high-performance power tools as well, such as drills, sabre saws and grinders|
Burglar-proof glazing consists of multiple panes. A layer of tear-resistant plastic foil is sandwiched between two individual panes of glass and bonded with them using heat and pressure, or lamination. This laminated safety glass is widely used today for safety and security applications. It is available in different thicknesses and levels of protection. Of course generally speaking, the thicker the better.
Laminated safety glass offers protection against thrown objects as well as handheld tools. When laminated safety glass is broken or shattered it breaks up into small fragments which stay stuck to the backing foil, instead of falling down and creating a hole in the window.
A burglar would therefore need to strike the window in the same place over and over again to even make a small hole. Forced entry becomes more difficult, taking far longer and requiring the intruder to make a lot of noise and movement. This makes it a good deterrent against burglary..