Chipping Concrete Blocks

Cover them with 3/4" plywood then steel panels. This should protect and absorb some of the shock. If it does chip, at least you won't have to see it. There may be some dents though...

Like keywalker said. If something hard hits the brick, it will chip, and there's nothing you can do about it. You have to put something over the brick to soften the blow. My suggestion would be spray-on truck bed liner. Don't like the look? Sorry, can't win 'em all.

The problem with any sealant is going to be getting it to penetrate deeply enough before it hardens - dilute PVA sealer will probable penetrate a few mm, but not much more. I agree with Keywalker - you'll need to cover them with something more durable.

I saw a water sealer that penetrated into the cinder block and sealed it from the inside out. It was for sealing basements from the outside moisture. Home Depot has it and maybe some of the other big home improvment stores.

I think it is called Drilock or maybe Drylock. We used a similar product, Xypex, that worked well for sealing out water seepage for a block foundation in a 100 yr old building in Florida. I don't think it made the block any more resilient though.

Just the results of a quick Google search, FWIW.

DESCRIPTION: CEMSEAL is a proprietary, aqueous blend of sodium silicates, penetrating aids and defoamers formulated for application by spray, roller or brush to new or old concrete. It chemically reacts with soluble calcium compounds (free lime) and forms insoluble calcium silicates resulting in a dense, breathable, synthetic quartz-type material. Cemseal protects concrete surfaces from abrasion, freeze-thaw damage and chloride ion intrusion. It stops water seepage from either the positive or negative side of the concrete slab when the seepage is not caused by cracking or other structural flaws and will strengthen, harden, density, dustproof and waterproof concrete permanently. Unlike solvent-based, membrane-forming topical sealants, CemSeal complies with modern regulations for environmental health and safety. Since CemSeal reacts with concrete constituents, it literally becomes a part of the concrete itself, and will not flake, chip, peel, or wash away.
Non-flammable, non-toxic, no-acid, no harmful fumes.
http://www.hytechsales.com/prod55.html