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Best adhesive for attaching rubber sheet to plywood

Discussion in 'Garage / Workshop' started by captain_beefheart14, Mar 27, 2021.

  1. Mar 27, 2021 at 5:53 AM
    #1
    captain_beefheart14

    captain_beefheart14 [OP] Well-Known Member

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    I’m finalizing my 8020/plywood bed box, and I’m to the step of attaching the rubber sheet/mat to the plywood panels on the top. For my previous bed box, I used liquid nails for this job, but didn’t really like the outcome.

    What should I go with? Contact cement, 3M 5200, Roberts 2001, or liquid nails? I also used spray on truckbed liner for the wood, so wondering if that should be sanded back down as well?

    Thanks, TW!
     
  2. Mar 27, 2021 at 6:00 AM
    #2
    Cudgel

    Cudgel “Tonka”

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    Roofing rubber cement is what I’d research. What grade is the plywood?

    pic?
     
  3. Mar 27, 2021 at 7:42 AM
    #3
    captain_beefheart14

    captain_beefheart14 [OP] Well-Known Member

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    Marine-grade Okoume

    D764B08E-C47A-4AE1-89C8-0135C4E4B685.jpg
     
  4. Mar 27, 2021 at 8:03 AM
    #4
    Knute

    Knute Well-Known Member

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    Weldbond Contact Cement.

    You will need 2 coats on the plywood. Just follow the directions on the can.

    Be careful when bonding together. If they touch and things aren't aligned.......its bonded.
     
    Cudgel and Evostaco like this.
  5. Mar 27, 2021 at 8:07 AM
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    Evostaco

    Evostaco Jack of some of the trades, master of maybe 2

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    I agree, we use weldbond at work. Good stuff
     
  6. Mar 27, 2021 at 8:16 AM
    #6
    captain_beefheart14

    captain_beefheart14 [OP] Well-Known Member

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    Rgr that, yeah that’s my main concern with using rubber cement type adhesives, most of the rubber work will be on big pieces that simply require a good measurement or two. I do have some intricate work around the latches for my two top hatches in the rear compartments (attached.)

    thanks for the recs though! I’ll try it out on some scrap pieces to get my bearings first.

    1C093070-22E5-41F0-B100-11FF40F0F9BC.jpg
    D68815B3-654C-42D3-BD9C-75884B8B7062.jpg
     
  7. Mar 27, 2021 at 8:22 AM
    #7
    Knute

    Knute Well-Known Member

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    A couple of tips when using Contact Cement, not rubber cement.

    Cut your bonded piece, not the base piece, a bit oversize. You can trim after its bonded.

    Use newspaper as a separation between the two pieces, pull out as you have sections positioned.

    Once both pieces are in contact with each other use a roller pin or similar to run over the surface. This will help to press the pieces together to help make 100% contact.

    To work around you latches, try the following.
    Remove the latches. Install the rubber, trim out the latch opening, install latch.

    The hatches can be treated like the main surface. Bond the rubber, then cut out the hatch following the gap btwn the hatch and main surface.
     
  8. Mar 27, 2021 at 8:29 AM
    #8
    captain_beefheart14

    captain_beefheart14 [OP] Well-Known Member

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    Big “Thank you” for this advice! I watched a few videos, but still apprehensive about it.

    “Use newspaper as a separation between the two pieces, pullout as you have sections positioned.”

    So the contact cement will only adhere to the other side of the contact cement? It won’t stick to the newspaper?

    I’ll give this a shot today.
     
  9. Mar 27, 2021 at 8:37 AM
    #9
    Knute

    Knute Well-Known Member

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    It is not wet when you make the bond.

    In this case.
    Apply the contact cement to the plywood. Wait about 20-30 minutes for it to dry. Apply a 2nd coat of contact cement to the plywood. Wait for it to dry. Apply a coating to the rubber. Wait for it to dry. The directions on the can are concise.

    Place the newspaper on the primary surface. Align your rubber, remove a piece of newspaper, press. Your bonded.

    I've successfully bonded sheets of plywood to each other to form a heavy assembly tables and bench tops. Yes, the first time will be apprehensive. Try the technique on a small piece first.

    The contact cement, when dry, won't stick to the newspaper. But if it touches the other surface with contact cement........its bonded.
     
  10. Mar 27, 2021 at 9:29 AM
    #10
    captain_beefheart14

    captain_beefheart14 [OP] Well-Known Member

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    Copy that. Thanks! I’ll report back how it goes
     
  11. Apr 1, 2021 at 12:15 AM
    #11
    hemitruk

    hemitruk Old man , young boi truk

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    A few
    Wax paper works too. Only its not as wide .
     

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