Sailing in the Mediterranean and Beyond

Episode 166 Sailing in the Mediterranean Installing port lights and portholes with Luis Martins


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Installing port lights and portholes with Luis Martins
Luis wrote me "Last time we talked you showed some interest in how I installed the new port lights and portholes in my boat without any screws or bolts. What do you say if we record a podcast on that subject?"
Great idea and here it is!
This is how it turned out and here are the products he used in the process:
 
3M 4991 VHB Acrylic Foam Tape 12mm x 16.5m x 2.3mm
https://amzn.to/2OHfbMU
https://amzn.to/2QGUG4d
Sika® Aktivator-205
https://www.jamestowndistributors.com/userportal/show_product.do?pid=3508
Sika® Primer-209N
https://amzn.to/2ODT2Px
Sikaflex 295 UV Black 10.3 oz. Cartridge Adhesive / Sealant Sika
The 4 products above were mentioned in the podcast with Luis Martins on installing Portlights and Portholes
Here are some Recommended Books
 
 
Lining up the portholes
Luis wrote...
"Considering the quality of today's adhesives compared to 20 years ago. I would not thru-bolt acrylic port lights as the holes will weaken the port light and create stress points that may lead to stress cracks. You need to drill oversized holes to accommodate for expansion of the acrylic with temperature changes and then deal with sealing those oversized holes.
In my opinion, bolting the port lights brings more problems that need to be addressed. If bolting, you should put spacers between the cabin sides and the acrylic so when you mount the port lights you don’t squash all the sealant and end with a very thin film of sealant that will fail as soon as the acrylic expands or contracts.
On my windows I put a small chamfer around the outer edge to reduce the bulk effect and it worked quite well. I also applied Sika primer 209 in the area where the tape and Sikaflex is. This primer serves three purposes: 1. You don’t see the tape and sealant, it’s all masked by the black primer; 2. The primer protects the tape and sealant from UV; 3. The primer promotes the bonding to the acrylic. Using the VHB tape made for a very simple process, you lay the tape on the cabin sides, stick the acrylic to it and then deal with masking and Sikaflex without the acrylic moving around or having dozens of bolts sticking out and having to align them. The VHB tape is very strong although it doesn’t look like at first. It’s pressure sensitive!"
Installing port lights and portholes
Here is a link to the instagram account https://www.instagram.com/p/BexuW9TFwXr/
https://www.instagram.com/p/BeNppHlFYc6/?utm_source=ig_web_button_share_sheet
Here are links to the other podcasts where Luis talks about Fiber glass techniques
https://www.medsailor.com/sailing-in-the-mediterranean-episode-114-luis-martins-on-how-to-fiberglass-pt-1/
https://www.medsailor.com/sailing-in-the-mediterranean-episode-126-luis-martins-on-how-to-fiberglass-pt-2/
https://www.medsailor.com/sailing-in-the-mediterranean-episode-128-luis-martins-on-how-to-repair-fiberglass-pt-3/
https://www.medsailor.com/sailing-in-the-mediterranean-episode-131-luis-martins-on-how-to-repair-fiberglass-pt-4-fixed/
https://www.medsailor.com/sailing-in-the-mediterranean-episode-135-luis-martins-on-fiberglass-vacuum-bagging/
In a previous podcast I talk about https://maritimedocumentation.us/ which is a scam to dupe you into paying about 3 times the cost to renew your coast guard documentation. Here are the details to this company Be aware and don't get sucked in like I was. If you were make the proper complaints to its ISP godaddy and the federal trade commission https://www.ftc.gov/
Be sure you listen to that episode here is the link Maritimeducumentation.us scam
If you have suggestions for future episodes please write me a note. Use the contact form at the website medsailor.com
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Sailing in the Mediterranean and BeyondBy Franz

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