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Old 04-18-2012, 06:39 PM   #1
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sealant for acrylic tub / tile surround


Hi guys,
1st post on the site. I tried searching for an answer first.

My problem is that the caulk seal I have been using around the edge of my American Standard Cadet whirlpool tub does not adhere well to the acrylic tub surface (it adheres just fine to the tile). I installed the tub & tile a couple years ago, and am about to have to caulk it for a fourth time. I am always meticulous about surface prep, using rubbing alcohol to get the surfaces spotless before application, and the flex in the tub is minimal... almost imperceptible.

Googling around I found a couple of tips that I am considering for my next try:
  • masking off the top of the tub and lightly sanding the edge so the sealant will adhere more effectively
  • filling the tub with water to pull the tub to the furthest distance from the wall while applying sealant to the joint
However, in my search for a better sealant, I have seen recommendations for no less than eight different products, so I'm hoping for some feedback on what's available in the market. What are the professionals using to avoid call-backs?

Here are the eight I've heard about so far:
  1. Geocel all-in One Adhesive/Sealant
  2. DAP® KWIK SEAL PLUS® Premium Kitchen & Bath Adhesive Caulk w/MICROBAN®
  3. DuPont™ Kitchen & Bath Premier Silicone
  4. GE Silicone II* K/B Supreme
  5. Lexel®
  6. Olympic PERMASEAL
  7. Polyseamseal® Speed Seal™ Kitchen & Bath Silicone
  8. Mono ULTRA BATH & KITCHEN

I have sent a similar query to American Standard (as their tech support line is closed for the night) and will let you know what they say as well.

Thanks in advance for your help!
-Aaron

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Old 04-19-2012, 12:29 AM   #2
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sealant for acrylic tub / tile surround


ok the acrylic needs to etched so silicone bonds better dow chemical makes a sealant primer.
http://www.dowcorning.com/applicatio...t.aspx?R=939EN

my understanding is it is a form of acetone. i use a qtip or a piece of paper towel for wider joints and rub on acrylic only where sealant is going.

i think that ge silicone II is the best to use from a box store

i also use this to keep a consistent bead width
http://orders.homaxproducts.com/Brow...Caulk-Finisher

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Old 04-19-2012, 02:20 AM   #3
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sealant for acrylic tub / tile surround


Wow, that's another approach entirely. Where can I expect to find that DOW surface prep chemical?

Quote:
Originally Posted by jaydevries View Post
ok the acrylic needs to etched so silicone bonds better dow chemical makes a sealant primer.
http://www.dowcorning.com/applicatio...t.aspx?R=939EN

my understanding is it is a form of acetone. i use a qtip or a piece of paper towel for wider joints and rub on acrylic only where sealant is going.

i think that ge silicone II is the best to use from a box store

i also use this to keep a consistent bead width
http://orders.homaxproducts.com/Brow...Caulk-Finisher
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Old 04-19-2012, 01:23 PM   #4
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sealant for acrylic tub / tile surround


Quote:
Originally Posted by jaydevries View Post
ok the acrylic needs to etched so silicone bonds better dow chemical makes a sealant primer.
http://www.dowcorning.com/applicatio...t.aspx?R=939EN
Jay: I found that primer, it's pretty pricey at $35 per can, and looks like a much bigger can than I'd need. Too bad they don't sell a single-use pouch.

Just got off the phone with American Standard: they recommend sanding the surface to promote adhesion, but mineral spirits are a big no-no, so many of the adhesives on my list that require mineral spirit clean-up are eliminated.

I'm leaving for the weekend tomorrow morning, so I guess I'll try the sanding technique with the new super sealant from GE (available at the local box stores) that is supposed to cure in 1hr, then let it dry all weekend to give it a good chance to cure. What a PitA!

Last edited by built4action; 04-19-2012 at 01:24 PM. Reason: added link to primer sale page
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Old 04-19-2012, 08:45 PM   #5
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sealant for acrylic tub / tile surround


yea i know it always expires before i use it too. the homax tool works great
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