Dow 795 Alternate?

kloudie1

kloudie1

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Nov 6, 2006
10,200
Hunter 34 Mandeville Louisiana
I saw a data sheet for GE "Iron Grip" construction adhesive that looked very similar to the properties of Dow Corning 795. The GE product is silicone based and has similar adhesion, UV resistance, and elongation characteristics. It is only available in clear, however it is kinda available locally at Home Depot; I can't find 795 in stock locally so I have to order it.. Curious if anyone has used the stuff in place of 795?
http://irongripadhesive.com/
 
woodster

woodster

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Sep 15, 2009
6,244
S2 9.2a Fairhope Al
go to any glass and sash shop that does storefronts they keep it on hand and most are very glad to sell you what you need .....always try to catch the mechanics ...not the front office guys ...and don't wear a neck-tie
 
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agprice22

agprice22

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Aug 3, 2012
2,542
Performance Cruising Telstar 28 302 Watkins Glen
You can check the properties of Dow 795 on the website. It is a silicone with +- 50% flex. There are other qualities, but you can probably match them with other products. I'll be curious to see what others say.
 
KD3PC

KD3PC

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Sep 25, 2008
1,069
boatless rainbow Callao, VA
DOW 795 is like the 5200 of adhesives. Personally I would not mess with another, especially one labelled "construction". Any glass shop can get the 795 fairly easily. Skyscraper glass uses it exclusively and holds up years. My 1991 windows, sealed with 795, lasted 20+ years before needing a rebed...I went with 795.

YMMV
 
kloudie1

kloudie1

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Nov 6, 2006
10,200
Hunter 34 Mandeville Louisiana
Laughing Woody.. I haven't worn a tie since I retired in 2008!
I can get 795 through Amazon, and I know it is pretty good stuff.. but driving down to the Home Depot when I run out or when I start a project I didn't intend (breakage?), is easier.. Was just curious if anyone had used the stuff. I ordered the 795 to replace a couple of lenses on some original Bowmar hatches, but came across the GE stuff and started wondering.
 
woodster

woodster

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Sep 15, 2009
6,244
S2 9.2a Fairhope Al
kloudie1 said:
Laughing Woody.. I haven't worn a tie since I retired in 2008!
I can get 795 through Amazon, and I know it is pretty good stuff.. but driving down to the Home Depot when I run out or when I start a project I didn't intend (breakage?), is easier.. Was just curious if anyone had used the stuff. I ordered the 795 to replace a couple of lenses on some original Bowmar hatches, but came across the GE stuff and started wondering.
Click to expand
it may be good but i have no knowledge of it yet ....the glass guys may be able to shed some light on it ...i am sure GE would tell you its better :biggrin:
 
agprice22

agprice22

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Aug 3, 2012
2,542
Performance Cruising Telstar 28 302 Watkins Glen
Or... Rebedding is not the end of the world! On the other hand, I did just receive 3 tubes of 795... Making my stockpile a total of 4 for the rebedding of my hatch and skylight.

Oh well. I guess you cannot argue with success. Besides, rebedding is ever a hurry up project.
 
kloudie1

kloudie1

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Nov 6, 2006
10,200
Hunter 34 Mandeville Louisiana
Thanks guys.. I have read the data sheets and know that the numbers are close as far as bond strength and elongation (so it stays attached to the plexi as the stuff expands and contracts.. like I said, very similar data sheets between the two products except for cure time.. the GE cures faster ..I was curious if anyone had used the GE product and had some real world experience.. Sounds like I hear a resounding "no".. which is a good answer ! tells me that I should go ahead and use the Dow Corning stuff.. I also see that GE has a product, 4000, that seems to be identical to 795, but I'd have to order it, so it does not scratch that itch..
 
kito

kito

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Sep 13, 2012
2,011
1979 Hunter Cherubini 30 Clemmons
I always order double what I think I need so it's always on hand. 795 seems to have a long shelf life. I just cracked a tube that I had for almost 3 years and was fine.
 
JamesG161

JamesG161

SBO Weather and Forecasting Forum Jim & John
Feb 14, 2014
8,008
Hunter 430 Waveland, MS
Silicone, of any type, has not been my choice weather proofing/adhesive. In landlubber construction, polyurethane based ones are preferred by me. However Dow 795 has a proven track record in the glass glazing world.

My main reason...

Different materials to be bonded, expand and contract at different rates. Either by rapid temperature changes or mechanical stresses.
Why Dow 795 works on glass seals is because the designer of boats/buildings understand this fact and make sure the frame that holds the glass/plastic has about the same material properties. i.e.. Fiberglas® and Plexiglas®

I did see a data sheet for 795 that shows adhesion tests between various materials at various temperature/stress conditions. I could not find GE info like that.o_O

You might ask Lowes or your local marine supply store to stock 795. All cardboard tube adhesives have a self life, plastic tubes, no so much.
Jim...
 
dscribner

dscribner

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Nov 9, 2008
1,338
Pearson-O'Day 290 Portland Maine
James,
795 is the one to beat in the glazing industry, glass as well as plastic. You actually want to avoid urethane of any kind when sealing plastic. The urethane causes "plasticizer migration". Do to this, the plastic glazing to craze and crack. I design skylights for a living (not residential rectangles) and if the customer requests polycarbonate or acrylic, we won't even allow urethane on our neck of the job site.
 
TFrere

TFrere

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Oct 1, 2008
144
Morgan 382 Mandeville, LA
Claude,
I buy Dow 795 in Baton Rouge
Acoustical Supply
12433 S Choctaw Dr
Baton Rouge
 
kloudie1

kloudie1

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Nov 6, 2006
10,200
Hunter 34 Mandeville Louisiana
Thanks, Tommy ! I appreciate the lead ! I had poked around Grainger and didn't find it.
I will buy my next batch there !
 
JamesG161

JamesG161

SBO Weather and Forecasting Forum Jim & John
Feb 14, 2014
8,008
Hunter 430 Waveland, MS
dscribner said:
You actually want to avoid urethane of any kind when sealing plastic. The urethane causes "plasticizer migration". Do to this, the plastic glazing to craze and crack. I design skylights for a living (not residential rectangles) and if the customer requests polycarbonate or acrylic, we won't even allow urethane on our neck of the job site.
Click to expand
No problem. You are right on target by applying what is compatible which includes many specs.

But guess what 3M 5200 is?

JamesG161 said:
In landlubber construction, polyurethane based ones are preferred by me
Click to expand
We don't allow silicon sealants on our jobs!;)
Jim...

PS: @kloudie1 Ken's Hardware in Gulfport? Answer above is polyurethane.
 
Bob S

Bob S

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Sep 27, 2007
1,813
Beneteau 393 New Bedford, MA
I have used GE Ultra Glaze to bed my forward hatch. It worked well and was recommended my Bomar.Both are structural adhesives. 795 is more readily available and costs less. If I did it again I would use 795. Woodster is right, go to any glass shop. They should be able to sell it to you. Better still call around to your local glass shops and ask.
 

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kloudie1

kloudie1

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Nov 6, 2006
10,200
Hunter 34 Mandeville Louisiana
Thanks, Bob.. I saw the Ultra Glaze on the GE website then tried to find it and couldn't.. The spec sheets for that and the 795 are pretty much the same.. My 795 came in the mail today so I will be using that stuff.
 
Maine Sail

Maine Sail

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Feb 6, 1998
11,758
Canadian Sailcraft 36T Casco Bay, ME
kloudie1 said:
Thanks, Tommy ! I appreciate the lead ! I had poked around Grainger and didn't find it.
I will buy my next batch there !
Click to expand
Kloudie,

Two words, McMaster-Carr.. The ship insanely fast, stock Dow 795 for under $9.00, and it would have been there by now......:wink: Personally I don't buy 795 locally because the date codes are sometimes already expired where the ones from McMaster-Carr still have plenty of date code..
 
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