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BoatLIFE LifeSeal Polyurethane/Silicone Sealant is a one part, fast curing, low odor, high adhesion, non-sag compound. LifeSeal is excellent for sealing decks to hulls, underwater thru hull fittings, vinyl ports, windshield setting glaze and the bedding of marine hardware. It retains excellent adhesion and elasticity under all weather conditions.
Note: Select 1/12 gallon size for a standard caulking cartridge.
JOINT DIMENSIONS LifeSeal is capable of withstanding extreme movement; however, we strongly recommend that joints be designed three times greater in width than the anticipated movement to help compensate for adverse field conditions. The joint width should not be less than 1/8". Joint depth should be a minimum of 1/4" to a maximum of 1/2".
PREPARATORY WORK The sealant bonding surfaces should be sound, clean, dry, and free of contamination such as release agents, water repellent treatment or other surface contaminants. Where adverse conditions are suspected, sanding is advisable. Clean surfaces to be caulked with Life Calk Solvent & Cleaner or Release.
METHOD OF APPLICATION LifeSeal can be applied directly from cartridges or bulk pails.
COMPOSITION & MATERIALS LifeSeal is a one-component, neutral emulsion of polyurethane and silicone polymers combined with proper crosslinking agents to form a unique sealant ready for use as supplied. Its ease of extrudability is unsurpassed and unaffected by extremes of temperature. Its "skin-over" time is 20 minutes or less, minimizing dirt pick-up. It cures rapidly to a firm rubber on contact with moisture from the atmosphere. Before material is cured, excess may be cleaned up with soap and water. Once cured, water will not affect the sealant. Under normal conditions LifeSeal will cure to a depth of 1/4" within 24 to 36 hours depending on temperature and humidity. LifeSeal is unsurpassed for long lasting performance in active joints with up to 75% total movement.
PACKAGING LifeSeal is packaged in 310 ml disposable cartridges fitting an ordinary caulking gun.
PACKAGE STABILITY 12 MONTHS at 75 F, & 50% relative humidity. Longer at a lower temperature and/or humidity.
COLORS LifeSeal is available in white, black, clear, and aluminum; other colors on special order only.
APPLICABLE STANDARDS LifeSeal exceeds the requirements of the Federal Specifications TT-S-001543A (COM-NBS) Type Non-Sag Class A. LifeSeal is impervious to the effects of sunlight, rain, or snow. The sealant can be applied as low as 10 F, provided the surfaces are clean, dry, and frost free.
June 27, 2018
USED ON A BROKEN SEAM. LEFT A HORRID MESS AND DIDN'T HARDEN AT ALL!
April 30, 2015
I've already posted a review but want to share an excellent tip from an experienced glazier friend. 1. Tape off both sides of the joint to be filled. 2. Slightly overfill the joint with sealant. 3. Using the bottom of the caulking tube (preferably an empty one)simply push the bottom end of the tube forward through the joint, collecting the excess sealant into the inside bottom of the tube. The joint will instantly be finished tooling - and look professional. 4.Immediately (and carefully) remove all masking from around the joint, then clean up any overspills on the surface around the joint. 5.The job s complete!
April 30, 2015
I am installing new polycarbonate cabin windows on my old sailboat and after much research settled on Life Seal to bed them in. I was pleased to find that J.D. carries the product because my orders always arrive from them quickly and with no surprises. Life Seal is the one product I found, designed specifically to work with the expansion and contraction of polycarbonate, combined with high adhesion capabilities. It works. I bought a tube for each window, also a can of the Boat Life Solvent. The black sealant that I used can be extremely messy and the solvent was a lifesaver. Plan your job carefully. The working time of Life Seal is about 10 minutes and all joint tooling must be complete in that time.
June 19, 2014
Used it to glue a bilge pump to floor of bilge.Seems to be doing the job.
April 9, 2014
I used Lifeseal for water tanks, Solar deck vents (was able to remove a plastic deck vent that had been in place for about 20 years without destroying it, and the rubbery sealing surface showed absolutely no signs of water intrusion) and wished I had used it in other places where the products couldn't handle the sun and/or I wanted to remove the hardware for replacement or repair. I just reinstalled my chainplates and can't think of a better product to insure water doesn't get behind them and allow the stainless steel corrode.
August 18, 2013
When rebedding chain plates, new Life Seal will adhere to the old Life Seal so you don't have to clean off all the old when removing and resealing. Tools and fairs easily and quickly with finger. Sticks to stainless and fiberglass with moderate strength, but still removable. The only product I use to bed deck hardware anymore. I use 5200 on screws and thru hulls, Life seal everywhere else. Caulks showers well and doesn't peel off like pure silicone does.
March 11, 2012
I attempted to do the same thing as the previous reviewer, re-bed a piece of lexan in a metal frame hatch. I had the exact same problems as the previous reviewer: a gooey, non-curing mess. I would avoid this product.
April 26, 2011
Used a 10oz cartridge to seal a Lexan lens to a metal hatch frame. Still a gooey mess after 2 weeks, and when it rained it left black streaks on the decks. Awful job to clean it all off to re-do the job. My guess is that the curing agent separated from the sealant while on the store shelf. Poor shelf life. Don't gamble with this.