Ok everyone, it’s my turn to ask for opinions.
I’m looking to cover the walls in my new dedicated grow room. I know you can just paint them flat white, but since I’m shelling out some coin to do it right I might as well spend a bit more.
Walls are all fire rated drywall. Retaining heat is not an issue.
What do you think, hammered Mylar, foylon, orca?
Links appreciated.
Tia.
@dbrn32 @HornHead @garrigan420 @PurpNGold74 @blackthumbbetty
@Drinkslinger I use Panda plastic on the walls of my room. Cheap and easy to work with. I staple it up to the walls, after a few scrubs I replace. I also line the top of my DWC bucket lids with this to block light. I’ve even seen people tape off soft wall rooms for separate veg and flower space with those stuff. Can even tape in a zipper but I just overlap a couple pieces for a door.
Hydrofarm ABWP25 Black & White, 10’ x 25’, 5.5 mil Poly Film, 10 x 25’/5.5 mm T, Black and White Amazon.com
This looks nifty, to me.
1000 sqft Diamond Radiant Barrier Solar Attic Foil Reflective Insulation 4x250 by AES Amazon.com
I did some research on it a few years back and flat white came out ahead, perhaps that’s why the factory chose it for hat reflectors.
IMHO and what I could find, flat white is best.
I agree with @shatter . The main benefit of flat white is the diffuse reflectivity, which doesn’t create hotspots in the way that glossier finishes can. Another benefit of flat white is that it’s easier to scout pests or debris on the walls; imagine trying to spot a bug or mold colony on a Mylar wall.
so if my walls are already flat white I can ditch the mylar?
Imo the biggest angle for painting over using any of the stuff you mentioned is cleanliness. Any of the other products you mentioned will trap moisture between them and your wall surface. Going with paint you apply a couple good coats of sealer primer and pretty much call it a day.
I’d cover level 4/5 drywall with a coating of PVA first, because it creates a barrier which makes priming/painting more efficient. I don’t know if that’s what you mean by sealer/primer.
Yes, companies like kilz and zinsser both make them. Readily available at home improvement stores and probably places like Walmart too.
I framed a booth that creates an 1 inch air space between my walls and the grow room. The interior was then covered in panda poly. The main reason I liked the panda poly is that it does a good job preventing moisture from escaping into the house framing. This allows air to move at room temperature around the grow room, not unlike a tent. The panda poly is pretty much ideal for light transmission. Most of all its cheap and super easy to install. Also its readily available! And lastly, it is removable rather than having to paint.
Some stuff is meant to be used like that. It involves proper installation and sealing, of course. If you just tack it up, bad. If you use construction adhesive for installation, plus seal the seams, you’ve got yourself a great set-up.
Wait…can you imagine using reflective paint? Would you even be able to enter that room without going blind? 
The room is framed out, completely insulated (r13), and a stand alone area in my basement. I have a dehumidifier keeping the RH of the basement between 35-45% year round. I was planning on sealing the drywall with killz first, then hanging a reflective wall covering only in the flowering side. This is where I want to maximize light.
I’m not hearing a lot of encouragement to go with a wall covering though…
I encourage you! If I build a grow room, I plan on lining the walls, too. Paint will never hold up to my cleaning protocol.
Im just here with 
to learn…
That does look good and easy to handle when putting it up
Home Depot sells 4x8 flat white panels that are really nice .No painting involved and easy to clean.
sorry to butt in, if you are going to run high moisture levels dont use kilz. there are specific primers and paints for high moisture in all box stores. I do A LOT of wet rooms in apartments and houses, I learned that moisture exposure paints are not equal. I dont know jack about growing yet but I paint and paint and paint
cheap foil insulation works great