[RE-wrenches] clear sealant recommendations

James Rudolph jamesrudolph99 at gmail.com
Tue Aug 25 17:52:42 PDT 2015


Aloha William,
So far 8+ years under the module in the shade, and about 4-5 if there in
direct sunlight.


On Thu, Aug 20, 2015 at 6:30 PM, William Miller <william at millersolar.com>
wrote:

>
> James:
>
> How long do your black "zips" hold up?
>
> William
>
>
> On Aug 20, 2015, at 5:18 PM, James Rudolph <jamesrudolph99 at gmail.com>
> wrote:
>
> Aloha,
>
> We  use GeoCell 4500 (Black) daily for years with no problems here in
> Hawaii ($4.99 a tube). I have also heard that black zips or sealant holds
> up better in the UV light, and my field experience seems to validate this.
>
>
> On Tue, Aug 11, 2015 at 5:09 PM, Ray Walters <ray at solarray.com> wrote:
>
>> I've used Lexel before, it's the best clear caulk I've used.  I used it
>> even to repair cracks on plastic lens on concentrating modules.  It holds
>> its clarity for a long time, however I don't know if its approved for
>> asphalt shingles.
>>
>> R.Ray Walters
>> CTO, Solarray, Inc
>> Nabcep Certified PV Installer,
>> Licensed Master Electrician
>> Solar Design Engineer303 505-8760
>>
>> On 8/11/2015 12:01 PM, Kevin Pegg wrote:
>>
>> At recommendation from a roofer couple years ago, we have been using this
>> product:
>> http://www.sashco.com/products/lexel/
>>
>> Not used long enough to know if it stands the test of time.
>>
>> Kevin
>>
>> -----Original Message-----
>> *From:* RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org
>> <re-wrenches-bounces at lists.re-wrenches.org>]*On Behalf Of *August Goers
>> *Sent:* August 10, 2015 2:53 PM
>> *To:* RE-wrenches
>> *Subject:* [RE-wrenches] clear sealant recommendations
>>
>> Hi Wrenches,
>>
>>
>>
>> For the most part we are using Chemlink M1 sealant for to seal our
>> rooftop penetrations. It hasn’t let us down yet.
>>
>>
>>
>> M1 is a available in several opaque colors and grey is the most common.
>> Sometimes we want a good quality clear sealant to put around conduit
>> fittings, where our conduit enters buildings, etc. We used Geocell 2300 in
>> the past and I don’t have anything bad to say to it but our current
>> supplier doesn’t carry Geocell products. More recently we’ve tried Chemlink
>> Clear sealant but I’ve already seen signs that it doesn’t hold up well in
>> the elements – it seems to peel off the surface it was installed on and
>> turn brown relatively fast.
>>
>>
>>
>> Does anyone have a good multipurpose clear sealant that they like?
>>
>>
>>
>> Best,
>>
>>
>>
>> August
>>
>>
>>
>>
>>
>>
>>
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>
>
> --
>
> *James B. Rudolph*
> *Haleakala Solar*
> *Director of Construction*
>
> *NABCEP Certified PV Installer # 091209-155*
>
>
>
>
>
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-- 

*James B. Rudolph*
*Haleakala Solar*
*Director of Construction*

*NABCEP Certified PV Installer # 091209-155*
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