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Old 04-04-2014, 05:58 AM  
suobs
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Default sealant for Hardieplank

Can anyone recommend a paintable sealant (by brand name) for the end edges where Hardie lap siding butts against wood? Problem with OSI Quad is it takes 7 days to cure. I need something that will be ready to paint within at most a 5 day lift rental.

Frankly I'm having trouble translating this into what to buy:

  • For best results use an Elastomeric Joint Sealant complying with ASTM C920 Grade NS, Class 25 or higher or a Latex Joint Sealant complying with ASTM C834. Caulking/Sealant must be applied in accordance with the caulking/sealant manufacturer’s written instructions or ASTM C1193.


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Old 04-04-2014, 06:47 AM  
beachguy005
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Get a good quality painters caulk.

Technical Bulletin
2400 Boston Street, Suite 200, Baltimore, Maryland 21224
Phone: 410-675-2100 or 800-543-3840
Revised: 10/27/10
DAP
®
ALEX
®
Painter’s Acrylic Latex Caulk

Paintable

Flexible

Easy Water Clean-Up

Indoor/Outdoor Use
Packaging:
10.1 fl. oz. (300 mL) cartridge
Color:
Brilliant White
UPC Number:
7079818609, 7079818618,
7079818670, 7079873630, 7079811540, 7079811542
Company Identification:
Manufacturer:
DAP Products Inc., 2400 Boston St., Ste. 200, Baltimore, Maryland 21224
Usage Information: Call 1-888-DAP-TIPS or visit dap.com & click on "Ask the Expert"
Order Information: 800-327-3339
Fax Number: 410-534-2650
Product Description:
DAP
®
ALEX
®
Painter’s Acrylic Latex Caulk
ensures a durable seal to prevent air and moisture from passing
through cracks and joints. It applies smoothly and easily and resists cracking and chalking. ALEX
®
Painter’s is
paintable with latex and oil based paints and can be used for both interior and exterior applications. It cleans up
easily with water, is low in odor and has a low VOC content.
Suggested Uses:
Ideal for caulking and sealing:

Window and door frames

Baseboards

Molding

Siding/trim

Corner joints
Adheres to:

Wood

Brick

Drywall

Metal

Painted surfaces

Most common building materials
Performance Characteristics:

Meets the performance requirements of ASTM C834 standard specification for latex sealants, grade
0°C, for extrudability, artificial weathering, extension-recovery, slump and tack-free time.

Resists cracking and chalking.

Tack-free in 30 minutes.



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Old 04-04-2014, 08:43 AM  
CallMeVilla
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Beachguy's recommendation is very practical. I would suggest a higher grade version which is elastomeric and cures overnight:

DAP Dynaflex 230 (comes in colors)

http://www.grainger.com/product/2KVG2?gclid=CMvbspeIx70CFY6Rfgodx4EAaw&cm_mmc=PPC: GooglePLA-_-Adhesives,%20Sealants%20and%20Tape-_-Caulks-_-2KVG2&ci_src=17588969&ci_sku=2KVG2&ef_id=Uz69tgAAB UPdu77H:20140404144122:s

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Old 04-04-2014, 11:18 AM  
suobs
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Yes and I just noticed I pasted paraphrased caulk specs. Hardie's actual statement includes the words "permanently flexible".

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Old 04-04-2014, 01:15 PM  
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Old 04-04-2014, 06:08 PM  
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Quote:
Originally Posted by suobs View Post
Yes and I just noticed I pasted paraphrased caulk specs. Hardie's actual statement includes the words "permanently flexible".
Hence the term "elastomeric" ...
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Old 04-04-2014, 06:47 PM  
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Thanks for the help all. Much appreciated. The DAP Dynaflex 230 is readily available at Home Depot and looks like the perfect solution.



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