What is a good glue/silicone caulking to use on plastic?


Is there a plexiglass or something that I could pour over these shells to keep them in place? That would be weatherproof for them to stay outside year round in Michigan?

q what is a good glue silicone caulking to use on plastic

I am planning on glueing or trying a silicone caulking to put seashells on plastic, underneath the downspout on the Gizmo to keep the water away from the house.

q what is a good glue silicone caulking to use on plastic

Is there any kind of a spray glue or something that would be easier to put over the sea shells so I wouldn't have to glue each one in place?

q what is a good glue silicone caulking to use on plastic

I don't know if the silicone caulking glue that I have would do the job? And keep the shells securely in place, because I'm sure that the hose and blowing the grass and all that stuff. I'm just trying to make sure they're going to stay in place. I want them to end up in the pool.

  8 answers
  • Cindy Cindy on Jun 18, 2020

    Hi Karen. The best glue to use on flexible plastics is Loctite Vinyl, Fabric and Plastic Flexible Adhesive. It's a clear liquid adhesive that's waterproof, dries clear, and creates a flexible bond that won't break down or yellow from UV/sunlight exposure. Good luck Karen. Hoping all is well with you.

    • Karen Karen on Jun 19, 2020

      Thank you for your input. I'll give that a try. Have a blessed weekend!

  • Vimarhonor Vimarhonor on Jun 19, 2020

    Hello please disregard my previous comment about using epoxy putty and sand. Both pictures did not pop up in my browser with my initial viewing. I thought you wanted to weight this splash guard and then seal the hole.

    Apologies for not seeing the complete picture and offering a confusing solution, Explaining a solution for the first picture but not the second.

    I have used epoxy resin pours —unfortunately— they are not suggested for outdoor use so I cannot suggest that solution to you. My guess....The best way to cement shells in there would be to use some sort of concrete just as you would use Pea gravel suspended in aggregate concrete surface. Thats my best guess.....

    • See 2 previous
    • Vimarhonor Vimarhonor on Jun 19, 2020

      I’m Truly sorry for the confusion miss understanding the project. The Epoxy putty is one of my favorite DIY repair items I always jump at the chance to use it and recommend it.

      I hope you find the perfect solution to satisfy your projectS needs. Best wishes Karen From Karen!

  • William William on Jun 19, 2020

    Two part epoxy pour would work. But since they aren't UV resistant they will yellow over time. There is a solution to prevent the yellowing. Once cured, epoxy is moisture resistant. Epoxy is not, on its own, UV resistant. Some epoxies have a UV resistant additive added to them that works moderately well. However, the best way to ensure that your epoxy doesn't yellow or breakdown from UV rays is to top coat it with clear UV resistant urethane.

    • Karen Karen on Jun 19, 2020

      Thank you so much for your input. I might give that a try. Have a blessed weekend!

  • Mogie Mogie on Jun 19, 2020

    This Super Glue Plastic Fusion Epoxy Adhesive is one of the best adhesives for plastic among others.

    It’s a heavy-duty glue and easy to use. You don’t have to take any pressure to apply it as the glue will work in 1 push! Moreover, its setting time is 14 to 18 minutes.

  • K. Rupp K. Rupp on Jun 19, 2020

    1) What I would do is use an epoxy pour just enough that it will keep the shells in place. The pour shouldn't come up around the sides of the shells. I can totally see that if the resin is seen, being outside, the resin will yellow very quickly. The pour would only be at the base underneath the shells.

    2) My second idea would be to use resin with sand mixed in. Again don't pour higher than the sides of the shells.

    3) You could also use a concrete that would work great outdoors.

    4) Another idea is to mix STUCCO PATCH (I think Lowes) with wood glue. This becomes like a cement but prettier. It is more like a white sanded texture but dries like cement. I used it in this painting:


    It will hold all your shells together and look pretty. I don't know how it will do outside but I am sure fine because stucco can be used outside.

    Hope these ideas help:)

  • Kathy Gunter Law Kathy Gunter Law on Jun 19, 2020

    You could use Loctite's Power Grab to glue the pieces together. It has a slow setting time but holds very well outside.

    • See 2 previous
    • Kathy Gunter Law Kathy Gunter Law on Jun 22, 2020

      I live in Alabama and we have high humidity. It usually takes it 2 days to dry here. It sets after a couple of hours/

  • Betsy Betsy on Jun 19, 2020

    Hi Karen: Both Gorilla Glue and E-6000 are good. Make sure the area is clean and there is no oil on the area and it's dry. Put a thin coat of glue on both items to be glued, let the glue get a bit tacky and then put them together. Hold for ab out a minute and then let dry over night. Good luck

    • Karen Karen on Jun 20, 2020

      Thank you for your input. I might try that. have a blessed weekend

  • Setsukograb Setsukograb on Aug 19, 2021

    Hello! I think you know that the best sealant in principle would be a silicone sealant, waterproof and with a good composition. If you choose a caulk that isn't waterproof, it makes no sense, and you just waste your money. I guarantee you that it'll just wash off in a few months, and you will have to reapply the process. I don't think that's pleasant. You can look on different sites for good caulk and choose which one works best for you click here. To do that, check the points above, and then you definitely won't have a problem with it.