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5 steps of hand lay-up procedure
Writer:admin    Released:2017-05-27 11:46:29    Type:【L】【M】【S

The first step:

 

Get rid of paint, or some other overseas cloth, from the floor to glassed using a disc sander. Do not use paint removers or a torch, as these just force the oils into the wooden, with the intention to bring about a negative bond. Rough up fiberglass surfaces to be glassed with a path disc. Slick, difficult, non-porous surfaces do not promote desirable adhesion of the glass and resin. On naked, dry wood, roll on a catalyszed primer coat of no wax resin and allow it treatment. That is to seal the floor so the wood does not absorb all of the moist resin from the fiberglass.

Step two:

 

Precut and match the fiberglass. Lay the glass out dry at the surface to be covered (there may be no moist resin concerned at this point). More or less trim off extra cloth. Very last trimming could be achieved with a disc sander and a utility knife. If simply one layer of glass is being applied, it is an amazing concept to overlap slightly in which two or greater layers are being applied. Simply butting portions collectively is okay, but ensure the butts are staggered. This can keep away from lumps because of overlapping. Iron out wrinkles by way of hand and dart corners for neat folds. On vertical surfaces, it may be necessary to hold glass in place with a few staples or tacks (stainless steel may not rust).

 

Step three:

 

Mix the catalyst with the resin. A common aggregate at 70 to seventy five°f is - two teaspoons in step with quart of resin. This offers about 15 to twenty mins attainable pot life. In cooler temperatures, up to 4 teaspoons according to quart of resin is k. Fiberglassing in temperatures below 55°f isn't recommended unless some artificial warmness is used or the solar is expected to polish at the challenge the identical day.

 

With resin catalyzed, you are now ready to begin wetting out the fiberglass. In lots of cases, the resin can be poured directly from the combination can onto the glass and spread around with the paint roller; in any other case you'll ought to work from the can or roller pan. The fiberglass will flip obvious when absolutely saturated. Put on simplest enough resin to moist out the glass. If the resin begins to gel inside the pot, discard it without delay. Do now not attempt to maintain because in a be counted of seconds it will likely be rock tough. Almost every glass professional loses resin in the pot now and again. These losses ought to be budgeted for whilst the resin amounts needed for a task are being expected. Now the primary moist out is finished. Just let it remedy difficult before any sanding is finished (2 to five hours at 70-75°f), until no wax resin is being used for a persisted lay up.

 

Step four:

 

You must decide before you start sanding how proper you want the final process to appearance. A few jobs require little or no sanding in any respect; others require lots of grinding. Feather aspect the overlaps with disc sander the usage of a 36-grit disc. The object is for the process to appear to be it changed into blanketed by one continuous sheet of fiberglass. Sand off any tough spots where a worm or leaf may additionally have gotten stuck within the moist resin. While grinding mat, best give attention to the overlaps and highest bumps. By the point you have got sanded the mat absolutely smooth, you have floor most of it away, defeating the motive. As opposed to immoderate grinding, farring putty made from glass beads and wasted resin may be squeezed on the mat with a huge drywall-taping knife. This fills up the lowest spots within the mat and, whilst tough, sands effortlessly. It is able to then be protected with a finish layer of 6 or 10-ounce material, if desired.

 

*be aware - if farring putty is going to be used, it adheres great to no wax resin.

 

Step five:

 

With all sanding completed, the final catalyzed layers of resin can be brushed or rolled on. When the use of cloth, simplest placed on sufficient resin to replenish the weave of the cloth until it's far clean. When these coats have hardened and had been sanded, they're ready for portray. The great primer is a  component epoxy white, which include gloucester b370. Oil base gloss enamels cross nicely over this. B370 primer is also encouraged on naked fiberglass underneath the water line while it is going to be painted with anti-fouling backside, paint. Oil base primers and enamels will also paintings on sanded polyester finishes, but are not intended for continuous immersion in water. Pigments also can be delivered to the resin to achieve a everlasting coloration requiring no paint. However, a clean, high-gloss finish can't be attained the usage of pigmented resin. On those surfaces wherein a stunning finish is not required (e.G. Workboat decks, or fish hold, and so on...), pigmented resin is suitable.

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