- Research Laboratories BMX5RG Blue MAX Waterproofer, Regular Use in Interior & Below-Grade Exterior Concrete Sealer and More. Liquid Rubber, 5 Gallon (Pack of 1), 640 Fl Oz

Used this to waterproof a window sill in my shower, the previous owners painted it with regular water based paint. 🤦‍♀️ Needless to say, the paint eventually cracked and peeled, so the sill was in desperate need of the proper type of paint for this situation, Blue Max was perfect, I prepared the surface, and applied a few coats, it works great, and no odor, love it!!!

Good stuff can’t go wrong here easy to apply more than one way to do it

Works but needs a top coat if used outdoors in the sun. Didnt know that when i bought it.

It is slimy. I used it to waterproof a concrete bird bath. I used two coats. I recommend letting it cure at least a week in warm weather before filling it with water. If you wait longer than what you think it should take to cure, it works great! I have a birdbath heater/fountain and the birdbath is completely sealed and waterproof.

You are not going to believe how I used this product. I build a whole water tank just with the product. No mortar used. Nice and thick but no pasty. Application easy I used ketchup bottles to spread. I used 2 of them on a cabin roof and painted over for water proofing. If you are DIY. You need this. This is my 8 bucket order.

I used the White version Ames block and wall in my basement four years ago it seems to be holding up pretty decent. This Blue version I used on some wood behind the gutter it did not hold up very well.

Great Item, definitely worth the money. I need to order more.

I was happily surprised with this product it did the job I needed. I am a satisfied customer.

Very good products sealed like it should. We'll by again.

Works great

Très bon produit il s’applique très bien

Got another galon to experiment with brush. Stunning luck of i formation. No word states on; Is any solvent available / what kind of if any ( it's possible to thin it with water or anything else? ) I would like to use this paint with an air spray gun- does it need a special equipment / hardware to do so?) Where is MSDS information about this chemical? I was hoping to get all of it along with the product, but NOTHING was attached to it! Taking two stars because of that.

Found it was not what I needed tried to return it and got nowhere . It's an ecpensive item to buy if it sits in a corner!