WHEN IS SHATTERPROOF NOT "SHATTERPRUFE"? Commercial Auto Glass (Pty) Ltd has just won landmark court victory against the Baker Street Trust, which licenses the “Shatterprufe” brand to the PG Group, in the High Court following attempts to prevent Commercial Auto Glass from describing it’s shatterproof windscreens as shatterproof windscreens. (Read more) SPECIAL OFFERS At CAG we have regular discounted prices on certain of our stock items. For information on our special offers, phone in or visit your nearest branch.