Plywood moisture sealer?

Daddyrawg · 01/29/2021, 09:47 PM

Whata a good plywood sealer?
Shellac? Polyurethane, what kind?

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Timfish · 01/30/2021, 07:47 AM

If it's the inside of the stand my prefference is white primer with either white deck paint or polyacrylic. The more coats the better.

Dr_N · 01/30/2021, 09:03 AM

I've been lurking on here as I prepare to build my 75 gallon aquarium. In my woodworking and freshwater experience, Spar urethane has shown good waterproofing properties. It comes in paint/roll on or spray on applications, and is as easy to work with as the typical polyurethane.

RBU1 · 01/30/2021, 09:15 AM

I would use a two part epoxy

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Misled · 01/30/2021, 09:41 AM

I use marine coatings for mine.

billdogg · 01/31/2021, 08:10 AM

For inside the stand I use a couple coats of primer, then a few coats of white latex exterior. I also seal the bottom several inches with flexseal.

For the outside of the stand it depends on your plan. Primer and exterior latex if you decide on paint. I prefer the look of wood, however, so I use stain and then several layers of General Finishes exterior polyurethane. It's water based, so almost no smell as it cures. I used it on a neighbors Green Egg cart about 10 years ago. It's held up remarkably well, although he does cover it between uses.

Alex3344 · 08/02/2021, 02:57 AM

I'm going to replace my old top deck with the new one I made of playwood. I'm wondering if I need special preparations before sealing it? I'm planning to use Waterlox Original Sealer (https://woodyexpert.com/best-deck-sealer/), it is stated that the product is self-sufficient and will be waterproof. I'm also wondering if I need to seal both sides?

billdogg · 08/05/2021, 01:37 PM

I'm not familiar with that, but yes, seal every surface you can, and with at least a couple coats. More is better. The last thing you want is for the plywood to get even damp and start delaminating. Sealed well, it will be impervious to pretty much anything.

01/29/2021, 09:47 PM	#1
Daddyrawg Registered Member Join Date: May 2018 Posts: 814	Plywood moisture sealer? Whata a good plywood sealer? Shellac? Polyurethane, what kind? Sent from my SM-G973U using Tapatalk

01/30/2021, 07:47 AM	#2
Timfish Registered Member Join Date: Jul 2010 Location: Austin, TX Posts: 1,985	If it's the inside of the stand my prefference is white primer with either white deck paint or polyacrylic. The more coats the better. __________________ "Our crystal clear aquaria come nowhere close to the nutrient loads that swirl around natural reefs" Charles Delbeek

01/30/2021, 09:41 AM	#5
Misled RC Mod Join Date: Oct 2006 Location: Pittsburgh, Pa Posts: 11,440 Blog Entries: 11	I use marine coatings for mine. __________________ Jesse I'm not saying I'm Batman. I'm just saying nobody has ever seen me and Batman in a room together.

01/31/2021, 08:10 AM	#6
billdogg Registered Member Join Date: Apr 2008 Location: Grove City, Ohio Posts: 10,806	For inside the stand I use a couple coats of primer, then a few coats of white latex exterior. I also seal the bottom several inches with flexseal. For the outside of the stand it depends on your plan. Primer and exterior latex if you decide on paint. I prefer the look of wood, however, so I use stain and then several layers of General Finishes exterior polyurethane. It's water based, so almost no smell as it cures. I used it on a neighbors Green Egg cart about 10 years ago. It's held up remarkably well, although he does cover it between uses. __________________ I'll try to be nice if you try to be smarter! I can't help that I grow older, but you can't make me grow up! Current Tank Info: 120 mixed reef with 40b sump, RO 150 skimmer, AI Sol Blue x 2, and a 60g Frag Tank with 100g rubbermaid sump. 2 x Kessil A360w lights, BM curve 5 skimmer

08/05/2021, 01:37 PM	#8
billdogg Registered Member Join Date: Apr 2008 Location: Grove City, Ohio Posts: 10,806	I'm not familiar with that, but yes, seal every surface you can, and with at least a couple coats. More is better. The last thing you want is for the plywood to get even damp and start delaminating. Sealed well, it will be impervious to pretty much anything. __________________ I'll try to be nice if you try to be smarter! I can't help that I grow older, but you can't make me grow up! Current Tank Info: 120 mixed reef with 40b sump, RO 150 skimmer, AI Sol Blue x 2, and a 60g Frag Tank with 100g rubbermaid sump. 2 x Kessil A360w lights, BM curve 5 skimmer

01/30/2021, 09:03 AM	#3
Dr_N Registered Member Join Date: Nov 2020 Posts: 6	I've been lurking on here as I prepare to build my 75 gallon aquarium. In my woodworking and freshwater experience, Spar urethane has shown good waterproofing properties. It comes in paint/roll on or spray on applications, and is as easy to work with as the typical polyurethane.

01/30/2021, 09:15 AM	#4
RBU1 Moving on Up Join Date: May 2004 Location: Southern NJ Posts: 5,167	I would use a two part epoxy Sent from my iPhone using Tapatalk

08/02/2021, 02:57 AM	#7
Alex3344 Registered Member Join Date: May 2018 Location: Netherlands Posts: 23	I'm going to replace my old top deck with the new one I made of playwood. I'm wondering if I need special preparations before sealing it? I'm planning to use Waterlox Original Sealer (https://woodyexpert.com/best-deck-sealer/), it is stated that the product is self-sufficient and will be waterproof. I'm also wondering if I need to seal both sides?