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» The Letterville BullBoard » Letterhead/Pinstriper Talk » Laminating HDU

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Author Topic: Laminating HDU
Gregg Parkes
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Hi all

This has been covered many times and I have no problem with the process.

Just curious though, when using West Systems fibreglass, HOW MUCH?

Do you generously cover the sheets (or just one sheet) which when routing can tend to show the join or:

Do you just "film" it one or two sides and let the 'glass work?

Do you use a paintbrush, squeegee of some sort, or notched spreader? Maybe there is something I haven't considered.

Thanks in advance

Gregg

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Gregg
Sydney Signworks
(02) 9837 1198
Schofields NSW Australia

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Dan Sawatzky
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Hey Greg!

I use Coastal Enterprises PB Bond-240 when I laminate my HDU (Precision Board) not Epoxy for just the reason you mention. The PB Bond 240 is like gorilla glue but it doesn't expand as much. If its a small piece I clamp things up good. If it's big I screw it tight them take out the screws later. It leaves small holes where the screws were but its no big deal.

-grampa dan

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Dan Sawatzky
Imagination Corporation
Yarrow, British Columbia
dan@imaginationcorporation.com
http://www.imaginationcorporation.com

Being a grampa is one of the the most wonderful things in the world!!!

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Ian Stewart-Koster
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Gregg, I've been using polyurethane glue from I think AVS company- but you can get it from Mitre-10 hardware stores up here. It's #705 & 706.
Like gorilla glue, it expands & cures as it absorbs humidity & moisture.

What I'm uncertain about is what's the best filler for filling holes & scratches/gouges. The 2 part auto bog is too hard & when sanded leaves obvious marks around the site as the HDU sands more easily.

I tried a waterbased spakfiller type of stuff, but when I put the zinnzer u/c on, it sort of washed it back off.

Maybe i SHOULKD GRAB SOME AQUADHERE & MULTIPANEL DUST & MIX THAT UP...oops sorry about the caps lock.

[ July 25, 2010, 01:37 AM: Message edited by: Ian Stewart-Koster ]

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"Stewey" on chat

"...there are no limits when you aim for perfection..." Jonathan Livingston Seagull

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Gregg Parkes
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Dan, I might try and import some PB Bond - 240 if allowed.

Ian I hear ya.

But I really need to know - what thickness- how much - what to you coat it with and to what thickness - vinyl, paper, honey?

Cheers

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Gregg
Sydney Signworks
(02) 9837 1198
Schofields NSW Australia

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Ian Stewart-Koster
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What filler do you use, Gregg?

As for glue- we 'just do it'.
It's sticky stuff-doesn't take much at all, just a thin smear.

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"Stewey" on chat

"...there are no limits when you aim for perfection..." Jonathan Livingston Seagull

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Joe Cieslowski
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I'm confused.............are we taliking about a fibreglass(?)glue or just a PU glue?

For filling small holes and voids I use Bondo's Glazing and Spot Putty. It's softer than their filler so it sands smooth without the "bump" that Stewey describes. It's one part and dries fast.

Joe,

Makin Chip$ and Havin Fun!

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Joe Cieslowski
Connecticut Woodcarvers Gallery
P.O.Box 368
East Canaan CT 06024
jcieslowski@snet.net
860-824-0883

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Dale Feicke
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That PB bond is some good stuff, like Dan said, it is not nearly as messy as Gorilla glue.

Joe, the spot putty is good, but I've run into cases over the years, where is shrinks as it dries, requiring multiple coats. I've been using an indoor/outdoor spackling compound, made by DAP, I think, that is very light, fast drying and easy to sand. It has a similar consistency to the HDU. Sometimes, when using a filler, when you sand it...if the filler is harder than the foam or vice-versa, it can make sanding more difficult. This stuff sands very smoothly.

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Dale Feicke Grafix
714 East St.
Mendenhall, MS 39114

"I can do all things through Christ, who strengthens me."

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Joe Cieslowski
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Thanks Dale, I'm aware of that.....I should have emphasized "small".

So, what's with this "fibreglass" glue????? It really sounds interesting.

Joe,

Makin Chip$ and Havin Fun!

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Joe Cieslowski
Connecticut Woodcarvers Gallery
P.O.Box 368
East Canaan CT 06024
jcieslowski@snet.net
860-824-0883

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Gregg Parkes
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Seems to be a little misunderstanding???

Appliques etc are fine - I have no problem.

Filling holes are no problem, I either use a water based filler, or a basic two part eoxy filler - such as that used for auto repairs.

I am mainly referring to bonding two 2400 x 1200mm or 6' x 4' (72" x 48") sheets of say 1 inch HDU together, to end up with a 2 inch or 50mm substrate (max 30mm thickness HDU here in Oz).

What thickness bonding agent such as two part resin do you apply... and how?

Thanks

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Gregg
Sydney Signworks
(02) 9837 1198
Schofields NSW Australia

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Gregg Parkes
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PS Ian, I fill heavy gouges and holes with auto filler, but when it gets to 75% cured, file the excess off with either heavy sandpaper, or a ladies throwaway emery board. Too hard and is impossible to remove without marring the HDU.

Standard sheets after a light sand I "trowell" Viponds Hi Build Sanding Sealer over the whole sheet. After drying and a light sand comes up smooth as - ready for rolling undercoat and then main coats.

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Gregg
Sydney Signworks
(02) 9837 1198
Schofields NSW Australia

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Joe Crumley
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Joe,

I presume the fellows are meaning fiberblass resin.

Here's one of my favorite hole fillers.
Mix equal amounts of Fiberblass resin with Bondo. Add both hardners and pour into holes. After a few minutes, when the mixture gets leathery, a sharp chisel is used to slice off any excess. It's ready to paint in an hour.

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Joe Crumley
Norman Sign Company
2200 Research Park Blvd.
Norman, OK
73069

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Billie DeBekker
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Gregg, When I use to use the Epoxy to Join HDU I would put it on a little thicker. 1mm (1/32) It seemed to me if I would go thinner it would Soak up in the HDU and Adhere the 2 panels together improperly, Leaving voids that I would have to comeback and fill. In a Pinch I have used Titebond 3 on HDU but not recommended (Way different bond line and a pain to blend)
I now "like every one else" use the PB Bond,if I don't want to wait on delivery the Gorilla Glue but GG makes a Huge MESS and you need a lot of clamps to keep you panels from lifting and shifting

[ July 25, 2010, 12:31 PM: Message edited by: William DeBekker ]

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Billie DeBekker
3rd Dimension Signs
Canon City Colorado 81212
719-276-9338
bill@3dsignco.com
www.3dsignco.com

"Another Fine Graduate of the Ray Charles School of Sign Painting."

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Dale Feicke
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Joe, just curious.....I use bondo and resin mixed together every so often.....but why do you use both hardeners? I just use the bondo hardener and it seems to work fine...

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Dale Feicke Grafix
714 East St.
Mendenhall, MS 39114

"I can do all things through Christ, who strengthens me."

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Rusty Bradley
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Dale...I use the Dap product also...I have found that if I put a couple of coats of paint on first before filling the hole...the patch doesn't show.

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Rusty Bradley
Bradley Sign Studio
100 Creekview Road
Summertown, Tn. 38483

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Raymond Chapman
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We use West System two part epoxy to glue panels together. A thin coat is squeeged on each surface and then the two panels are held in place with clamps or weight (gallon cans of paint).

For patching holes we use Magic Sculpt.

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Chapman Sign Studio
Temple, Texas
chapmanstudio@sbcglobal.net

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Wayne Webb
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I've used both West Systems and PB240 and have had no failures reported with either. The largest sign we did with the epoxy is about 260 miles away from here so I can't check on it to see how it's doing. Both will work if you do it right; but I prefer PB240 because cleaning up squeezeout is easier and because of the fact that you are using urethane to bond urethane.

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Wayne Webb
Webb Signworks
Chipley, FL
850.638.9329
wayne@webbsignworks.com

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Joe Crumley
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Thanks Dale,

I'll have to give it a go. The hardner for Fiberglass Resin has never been easy to tell how much is needed.

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Joe Crumley
Norman Sign Company
2200 Research Park Blvd.
Norman, OK
73069

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Chris Lovelady
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pb bond here. here is a step by step to show how to laminate 2 pieces together. we use a mesh that is used in brown coating stucco and it is glued between the 2 pieces and give excellent support. i like Dan's idea of the screews but when you blast i am not sure of the reseluts were the screws have been. just my 2 cents...was talking to Joe Crumley today about this very thing! thanks for the call Joe!

http://www.letterville.com/steps/chrislovelady/index.htm

Lovelady

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"We have been making house calls since 1992"

Chris Lovelady
Vital Signs

NOW WITH 2 LOCATIONS!
Tallahassee, Florida
Thomasville, Ga.

www.vitalsignsllc.com
1-850-893-0674

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