Here’s the instruction book I was looking at that refers to the UV tape: http://www.bluemoment.com/downloads/sikaflexmarinehandbook.pdf
Page 16 and 17. Actually they have 2 diagrams ... one with the UV tape just over the window portion and one having it overlap the surrounding frame area. Go figure! I think I’ve seen a reference somewhere else to using a ‘UV resistant paint’ on the exterior of the windows (but not over the expansion gap) .... but I’m not sure what paint that would be. It appears for the fiberglass rebate they want you to: 1) abrade 2) clean with Sika 205 3) prime with Sika 206 G+P or Sika 215 And for the windows they want you to: 1) abrade 2) clean with Sika 205 2) prime with Sika 209 So different primers for fiberglass and the windows. For an aluminum hatch frame they want you to: 1) abrade (scotchbrite in this case) 2) clean with Sika 205 3) prime with Sika 210T So yet another primer for aluminum. I think it’s been mentioned previously but alcohol must not come in contact with the 295UV during the curing process – it interferes with it. There’s also a Sika Tooling Agent N for smoothing out the expansion joint bead and Sika Remover 208 (not the cleaner 205) for clean-up. I’m assuming, as others have said, that bracing during cure is done typically with screws and washers around the perimeter with spacers behind ... or, I would think as a less preferable option, holes drilled in the windows with screws and washers and you remove all that prior to filling the expansion gap (and any holes) ... which means using the black 295UV. From: robert via CnC-List Sent: Thursday, February 26, 2015 5:35 AM To: cnc-list@cnc-list.com Subject: Stus-List Forward hatches on the 1981 C&C30 MK1 In 2009, we replaced our side cabin windows.....used Sika 295 UV and Sika Primer......never heard of 'Sika UV Shielding Tape'. When you apply the Sika Primer to the new windows and the gelcoat, you should understand why it is highly recommended......it 'bites' into surfaces you apply it to. I used a 1/2" painter's brush to apply the Primer and you could feel the 'resistance' as you dragged it along the surface(s). I taped everything, inside and outside, and applied 'more' rather than 'less' Sika 295UV so that when the windows were fitted into their slots, there was adhesive oozing out all around.....especially onthe outside. And I never used 'spacers'.....I bought them but decided at the last moment not to use them.....I felt they might be a weak point. I let the Sika cure for 3 days before I disturbed anything......the extra adhesive that oozed out was easily trimmed off with a razor blade. One tip.......as soon as you install a window and have it secured in place, remove the tape before the Sika cures. If the adhesive cures before you remove the tape, you will make the job much more difficult. As for gaskets, I replaced all of my hatch gaskets.....obtained them from Hammerhead....the guy there used to work for A&H.....very knowledgeable......I talked to him on the phone....I said I needed 3/4" D-shaped gaskets......he said I needed 1/2" D-shaped gaskets.....he was right, 1/2" was the perfect size and he sent me a tube of caulking I didn't ask for but was grateful for getting. Rob Abbott AZURA C&C 32 - 84 Halifax, N.S. On 2015-02-26 9:00 AM, Jake Brodersen via CnC-List wrote: I use the Sika primer, as it is “highly recommended” to ensure a good seal. Yes, it’s expensive, but I hate doing a job twice. A bottle of primer goes a long way. Sika recommends that the edges of the window be painted over where the sealant is used. This is because exposure to light degrades the adhesive. I’m assuming this would be UV exposure. To date, I have not done this and have had zero problems. It could cause premature failure of the seal in the long term though. I use a dremel tool with a sanding drum to rough up the edges of the windows before installing them. I give the material some tooth, then wipe it down with alcohol to remove any contamination. Don’t be afraid to grind into the plexi to get a good surface for the adhesive. It won’t show from the outside. Jake Jake Brodersen “Midnight Mistress” C&C 35 Mk-III Hampton VA
_______________________________________________ Email address: CnC-List@cnc-list.com To change your list preferences, including unsubscribing -- go to the bottom of page at: http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com
