[RE-wrenches] clear sealant recommendations

James Rudolph jamesrudolph99 at gmail.com
Thu Aug 20 17:18:55 PDT 2015


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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