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Sikaflex 252 Polyurethane Adhesive
$19.05Out of Stock
Sikaflex 252 Polyurethane Adhesive
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Sikaflex 252 Polyurethane Adhesive Customer Questions and Answers

10 of 17 Questions

Question

I want to adhere aluminum sheet to plywood backing on the sides of a teardrop trailer I am building. Sika 252 sound like a good product. Question: Can it be spread with a toothed trowel? If so, what size teeth? How long is the working time used in this manner? Is priming required? Thanks, Greg G

Asked on 05/07/2012 by Undisclosed

Top Answer

No I can not help, because I bought Sikaflex 221

Answered on 05/08/2012 by DANIEL O`CONNORS
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Answer

Yes it can be spread witha trowel. Dont know the teeth count. Working time I'd estimate up to half and hour. On aluminum, a special primer is definitely needed. Contact Sika for details.

Answered on 05/07/2012 by JOHN RHETTS

Answer

I used it to glue metal supports to the bonnet of a 68 jaguar XKE with excellent results. This is very thick, but does not set particularly fast so you may be able to spread it with a toothed trowel. You may want to consider doing dots instead of trying to cover the entire surface area...but that is your call.

Answered on 05/07/2012 by DAVID LIMA

Answer

I used the product to bond PVC plastic to metal. I only used the applicator on the tube. Working time was about 15 minutes, You could probably just apply in a S pattern like you would on paneling ? Hope this helps BK

Answered on 05/07/2012 by BRIAN KENNEDY

Answer

Sika 252 will work well for your application. Sika 291 will work just as well and may be easier to spread, as you won't need the non-sag properties of the more viscous 252, but 252 should spread adequately as well. Best to test what size teeth will work best -- probably the coarser ones. Be sure to scuff the aluminum surface with a scotch bright pad or with steel wool or fine sand paper and then clean thoroughly. The surface of cleaned aluminum oxidizes almost instantly, impacting chemical adhesion, so making deeper grooves with coarse sand paper will greatly improve the product's mechanical grip. If this were a high strength application (which it is not), to improve chemical adhesion (as opposed to mechanical grip), I would first abrade as described above, then clean with Sika Aktivator or Cleaner-Activator 205, according to directions, followed by Sika Primer 210T, and finally the Sikaflex rubber. I think this would be overkill for your application. Sikaflex cure is a chemical process initiated by moisture. Just 10% atmospheric moisture suffices to start the cure at the edges, which will then gradually progress inward. It may take some time for the Sika furthest from the edges to cure. This should not be a problem, but if you wish to accelerate the cure farthest from the edges just breathe on the spread Sikaflex surface to introduce a wee bit of moisture prior to assembly, or spary a wee bit of fine mist from a spray bottle. The smallest amount of moisture suffices to initiate the cure. Working time will depend on temperature and humidity. Dispense a small amount of Sikaflex onto a discardable surface and, from time to time, touch it with anything to determine whether it sticks or not. As soon as the Sika skins over and its surface no longer sticks and pulls away when touched, that's just past its working time. If you are working with a large surface you might want to use Sikaflex 291-LOT which advertises a working time of 3 to 5 hours.

Answered on 05/08/2012 by RODOLFO PETSCHEK
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Question

In which store can you buy this?

Asked on 02/05/2014 by Undisclosed

Top Answer

I ordered the Sikaflex 252 Polyurethane Adhesive from Jamestown so as to receive new replenished stock. I did not want to end up with tubes that have been sitting around for a year. This is a GREAT product !!

Answered on 02/06/2014 by FLOYD BARTON
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C'mon Jamestown. Can't you answer this one? Don't you know your own inventory?

Answered on 02/06/2014 by RODOLFO PETSCHEK

Answer

I don't know which stores sell Sikaflex 252. I found it on-line and ordered from Jamestown Distributers.

Answered on 02/05/2014 by ERNEST HORNE

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Camping world or a rv store

Answered on 02/06/2014 by BOB MIRTICH
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Question

I'm trying to Mounts Solar Panels to the roof of my M/H I can't drill & bolt them down I order Corner Mounts should I use Sikaflex 252 or 291 or should I use V H B Tape ?? The Panels are about 22 lbs each 26 X 40 Thanks Joe

Asked on 06/01/2013 by Joe Ippi

Top Answer

Have used Sikaflex 252 for tillable Solar Panels to a smooth painted aluminum RV roof. Paint was in good shape. Cleaned and applied Sikaflex 252 with mounting brackets. Panels have withstood 40 mph wind when tilted up. Never had a failure.

Answered on 02/06/2014 by FLOYD BARTON
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Answer

I think Sikaflex 252 should work fine for your application. Sikaflex 252 is relatively thick (i.e. does not sag or drip), so you can build a relatively big chunk to hold the mounts down. Because 252 is thick it will need a strong caulk gun like a Newborn. A 5$ caulk gun will simply not work with 252. I have never tried 291 or VHB tape, but guess that in genreal urethanes are better at absorbing vibration than tape.... good luck...

Answered on 06/08/2013 by MICHAEL BELLOS

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Lord Fusor 123 would would be a better and stronger bond for the heavy panels

Answered on 06/07/2013 by JOHN BLOCK

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If you remove all paint from both surfaces and use 252 I don't think you can tear them apart ever

Answered on 06/08/2013 by Jere Brannon
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Question

What preparation do I need to do before using sika 252 on diamond plates? Sika cleaner activator 205 & sanding would be enough or do I need to also use a primer? Thanks

Asked on 06/25/2013 by Undisclosed

Top Answer

I have never used 252 on bear metal so do not feel qualified to answer this question-Guy Tomme

Answered on 06/25/2013 by GUY TOMME
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Can't help you with that aspect, I use it at Church Camp to stick rocks to a piece of cement board for a senior wall. Just make sure the surface is clean with no oil on the metal.

Answered on 06/25/2013 by JAMES BIRD

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I have never used 252 on bear metal so do feel qualified to answer this question-Guy Tomme

Answered on 06/25/2013 by GUY TOMME
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Question

Drying time for the 252 ???

Asked on 05/11/2013 by Undisclosed

Top Answer

I gave 24 hours to allow maximim curing. This stuff is awesome in its adheasion and staying power!

Answered on 05/31/2013 by DAVID LIMA
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Answer

Sika 252 seems to cure in 2-6 days depending on thickness and humidity. If too thick, the inside might never firm up properly.

Answered on 05/31/2013 by JOSEPH DWYER

Answer

Working time perhaps 1-2 hrs. cure depends on ambient humidity.

Answered on 05/31/2013 by JOHN RHETTS
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Question

Is this suitable for sealing joins on inflatable dinghies?

Asked on 03/13/2013 by Undisclosed

Top Answer

No. Clean and repair as normal for your inflatable's material. Fix it right so you don't end up swimming.

Answered on 02/06/2014 by FLOYD BARTON
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Answer

I have no idea about this application. i just now it is really waterproof..

Answered on 04/17/2013 by PATRICK TAYLOR

Answer

I've never used 252 for that particular application but I see no rerasson why it should not work well. You'll improve the already excellent adhesion if you scuff or steel wool the surfasce of the substrate and wipe clean with solvent. Most Sika products require a bit of moisture to start the cure. Even 10% humidity suffices. If the environment is very dry I will breathe on the applied surfaces before joining them, or spray a single pump stroke of fine mist on the applied Sika before joining. This is a dabulous product, especially for marine applications, but I use it for general purpose as well. Good luck with your project.

Answered on 03/15/2013 by RODOLFO PETSCHEK
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Question

I'm looking for an adhesive to mount solar panels to a rubber RV roof using "Instapark" solar panel mounts. Will this product work?

Asked on 03/04/2015 by Timothy Thomas

Top Answer

That's exactly what I used it for and my panels remain firmly attached after 3 years and 30,000 plus miles. One difference is that my coach roof is solid fiberglass. I used the instapark mounts. Once this polyurethane adhesive cures it really sticks and is very tough. It does take several days to cure.

Answered on 03/05/2015 by DUANE DURBIN
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Answer

Yes. Good choice. Terrific product. Depending on the surfaces, especially bare aluminum, it might benefit from a primer. Check the product's information. I've used it successfully for a variety of purposes big and small over the years. Just make sure the surfaces are clean before application.

Answered on 03/04/2015 by RODOLFO PETSCHEK
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Question

How fast does sikaflex 252 dry?

Asked on 07/25/2013 by Undisclosed

Top Answer

It only took 2 days, but we let it rest for a week.

Answered on 07/25/2013 by MICHELLE FORSETH
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Answer

Depending on temperature, it takesabout 24 hrs to fuly dry.

Answered on 07/25/2013 by EDWIN ZAHARATOS
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Question

What's the unipac?

Asked on 01/29/2012 by Undisclosed

Top Answer

Ask jamestown, its their catalogue. I would guess that it is the bulk pack in a 'sausage' shape, but I dont know!

Answered on 01/30/2012 by JOHN RHETTS
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Answer

I have used Sikaflex for over thirty years and never came across the word "unipack" before. I assume that it refers to Sikaflex being a single componenet product rather than having to mix two parts. Sikaflex 252 is a great product. I swear by it, and use it regularly for boating and non-boating applications. I regret that it is no longer widely available in the smaller three ounce tubes. Once open, Sikaflex will start to cure from the nozzle backward into the tube. The slightest bit of humidity in the air will start this curing process. Initially you can squeeze tightly and dislodge the semi-cured plug from the tip, or try to pry it out. After a few days this is no longer possible, but for a relatively long period thereafter you can punch a hole in the side of the tube (near the tip, because this will also cure and plug up, so the next hole will need to be a bit higher up the tube) and squeeze the product out through this hole. Once you notice that the product comes out somewhat more viscous than before, it will still cure properly, but will no longer adhere as well, so it's time to toss the rest.

Answered on 01/30/2012 by RODOLFO PETSCHEK
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Question

how well does it work under water ?

Asked on 07/13/2011 by Undisclosed

Top Answer

It's waterproof when cured. No data on whether it will cure underwater.

Answered on 07/15/2011 by JOHN A CALOGERO
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Answer

I do not know; used it only in dry situation. In that case it is VERY strong and elastic adhesive!! Try SikaFlex for an answer.

Answered on 07/15/2011 by JOHN RHETTS
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