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Docfletcher 10-22-2007 12:00 AM

Which Roof & Flashing Sealant Do you Prefer?
TRG In a previous conversation you told me what you liked, I wrote it down, that was some time ago, and now must confess to losing my scribble.

While going over GAF Timbertex installation instructions I noticed Sonneborn NP1 and Henkel PL Urethane specified for high wind areas. Both these products claim a permanent , water and weatherproof seal.

Has GE Silicone II Blacktop & Roof been dethroned. ( assuming it ever had the throne)

I thought it odd that the roofing supply stores in my area sell none of Urethanes but do sell Silicone based sealants of one sort or another.

So then, what works in real world roofing applications? :jester:

ncgrogan 10-23-2007 02:49 PM

Depends on what application your using ir for. I love NP1 and NP2. NP1 comes in a tube, is a one part, and is a moisture cure. NP2 is a two part, chemical cure and comes in a bucket, available in almost any color. I like silicones too, Dow and Pecora make some nice products as well. Typically my rule of thumb has been to use the urethanes where I dont expect a high amount of movement (ie surface mounted counterflashing) and the silicones where a lot of movement is expected.

Docfletcher 10-23-2007 04:46 PM

Good answer! I just found out PL (Henkel) has just come out with a new product, a hybred in fact. If you can believe that. It's named Ultimate hybred sealant + adhesive.

I have not found the NP 1 in my area. 3M makes a 5200 Urethane thats great. Good for below waterlines. Not considered removable. There is a 4200 not quite as strong but quite good (I think) also, and removable. :laughing:

tinner666 10-23-2007 06:25 PM

Interesting thread. I tend to buy Black Jack Neoprene. Must use 12 or more tubes each year. Ultra19 in the tube looks decent too. Just bough some to use with a PolyGlass roof system.

Most of my roofs are metal, so I don't get to use much sealant.

Docfletcher 10-23-2007 06:45 PM

Based on the information I have gathered thus far Urethanes are being introduced for a increasing array of applications. I bought PL Polyurethane today. Gonna use it to secure some of my brother in laws ridge shingles.


the roofing god 10-24-2007 09:44 PM

been working--you need better notes doc -the bomb is GEOCELL 2300tri-polymer sealant which is a mix of silicone and urethane,can be applied in most temperatures,and has 800 per cent elasticity,sonneborn is also excellent

the roofing god 10-24-2007 09:44 PM

all you had to do was call:yes:

Docfletcher 10-24-2007 10:23 PM

TRG, Yes I could have called. Or, simply emailed you. Posting was more fun and now thanks to you, the board knows about the "BOMB". :thumbsup:

the roofing god 10-25-2007 07:41 AM

but you spent the $ on something else

Docfletcher 10-27-2007 07:26 PM

My brother in law paid for it. :laughing:

RooferJim 10-28-2007 05:11 PM

We like Tremco Dymonic for reglets and flashing joints. You can tool it "unlike Geocell". Also has all the colors to match mortor etc.. We use Bulldog to hand seal shingles.

the roofing god 10-28-2007 06:52 PM

for reglets GEocell mortar seal-for shingles geocell rp-400,can be tooled as it`s installed,if you can`t install it neat enough,also mineral spirits works

Docfletcher 11-04-2007 10:03 PM

Whats the story on the Geocel 3500? :wink:

the roofing god 11-05-2007 06:35 AM

you tell me chuckles

Docfletcher 11-05-2007 06:02 PM

Well, I'd like to know who has used it, on what and what success they had with it? So then, thats what I meant by "Whats The Story". :yes:

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