• We invite you to join UKWorkshop.
    Members can turn off viewing Ads!

Sealing WBP plywood

UKworkshop.co.uk

Help Support UKworkshop.co.uk:

pocketslint

New member
Joined
6 Mar 2012
Messages
2
Reaction score
0
Location
glasgow
Hello all, I am new to the site and I would appreciate some help and advice please. I am making a cross/marker for an unmarked family grave that I located for an aunt of mine. I intend making this by laminating 5 layers cut from a sheet of 18mm WBP plywood. I am going to seal it with a propriety sealer/stain and finish it with a coat or two of Yacht Varnish. I was wanting to know if I should seal/stain each individual layer before I glue them together. Would this add to its water/moisture resistance? and would it affect the property of the adhesive? which I would also want some advice on. I don't expect this to rival the Taj Mahal but I do want it to last a few seasons at least. Thanking you all in advance, WW.
 

Rob Platt

Established Member
Joined
21 Nov 2010
Messages
583
Reaction score
0
Location
Merseyside
no glue them all together first or they probably wont glue successfully. seal afterwards
all the best
rob
 

Rob Platt

Established Member
Joined
21 Nov 2010
Messages
583
Reaction score
0
Location
Merseyside
evostick exterior wood glue blue bottle or titebond 2 or 3 clamp it tight and leave it for 24 hours in the clamps if its as cold and damp as it can be at this time of the year.
all the best
rob
 

Benchwayze

Established Member
Joined
10 Mar 2007
Messages
9,450
Reaction score
108
Location
West Muddylands
Pocket,

Welcome aboard.

To save time clamping, screw the layers together as you go, with plenty of weather resistant screws. Screw each layer down, as you go, onto what is to be the shown face, leaving it clear of any evidence of the screws. At the back, you could countersink well, and fill over those screws. The screws act as clamps of course.

HTH :)
 

hunggaur

Established Member
Joined
25 Sep 2008
Messages
391
Reaction score
0
Location
worcestershire
if it were me i would use epoxy then when finished give it a couple of coats of clear epoxy to finish it off (the same as you do when you make a boat) should then be 100% waterproof and last for years

jon
 

srp

Established Member
Joined
29 Jun 2009
Messages
204
Reaction score
13
Location
south
If it was me I wouldn't use ply at all, or varnish. Having owned and maintained a variety of boats for too many years I can tell you for nothing that varnish will not last any longer than one year outside. WBP will start to deteriorate as soon as the varnish film degrades. Epoxy resin is not UV resistant, so would need a UV resistant varnish coating, which again would only last a year tops.
Your best bet would be to use a durable hardwood like English Oak, teak (if you can afford it), or iroko, and leave it unfinished. It will weather to a silver grey colour. Avoid any sort of glue and join the two pieces with either stainless or silicon bronze screws.
 
Top