Readily available at any good paint store, custom auto shop or boat shop, usually cheaper at the paint store. It comes as a clear topcoat and in colors. The colors can be tinted or mixed, but use ONLY the colorants recommended by your supplier for your product.
It's not rocket science, but careful surface preparation and exactly following instructions is a must. Your vendor or public library normally has DIY booklets with illustrations and tips.
When even a small amount of the clear "catalyst" is mixed into each batch, the clock starts and can't be stopped, so mix small batches until you get the hang of it or risk owning a freeform art object complete with imbedded paintbrush.
Also, be sure to buy or borrow a quality nose-mouth respirator (under $50 with appropriate screw-on replaceable cannisters). Both the dust from sanding and fumes while applying should be carefully avoided. A box fan blowing from behind you is good.
Usual procedure is to repair all problem areas with desired color, sand again lightly, then add a clear coat of gelcoat for a glass-like finish.
Last word: study directions very carefully regarding how much to mix at a time and how much "catalyst" activator to add. This depends a lot on the day's temperature, humidity and the temperature of the spa's surface when applied.
Repair Fiberglass Spa
Supplies are everywhere. Did you mention your spa is made out of what material, do you know?
Since boats are more plentiful than spa's or pools and boaters seem to make lots of repairs , you will find many many articles at the big box boat stores such as boatus or west marine online regarding basic fiberglass repairs.
But bonding to a particular surface other than fiberglass will be your task at hand of course.CorrectionSupplies to repair a fiberglass spa cannot be easily found. "Big box" boat stores only sell marine gel coat which must not be used in chemically treated water. Marine gel coat will turn yellow within two years and completely break down within three years. Only swimming pool gel coat can be used successfully in chemically treated water. "Swimming pool gel coat" can be found online and must follow a coating of vinyl ester resin.
Fiberglass hot tub restoration requires swimming pool gelcoat as opposed to marine or automobile gelcoat, or the cheap two part epoxy sold at paint stores. Swimming pool gelcoat was used when the hot tub was manufactured and is required due to the chemically treated water found in most hot tubs.
Swimming pool gelcoat, also known as fiberglass pool paint, can be purchased online and shipped directly to your home. Swimming pool gelcoat is not available as a clear coat because it would turn yellow rather quickly however, every color you can imagine is available.
The "glass like finish" referred to above can only be accomplished by using acrylic, and acrylic will not laminate to a hot tub originally finished with gelcoat. nor will gelcoat laminate to a hot tub originally finished with acrylic.
Finally, complete instructions are available at the online vendor and these instructions are specifically written for hot tubs and Swimming Pools.
There are three main types of inground swimming pools: concrete, vinyl and fiberglass. All of which are prone to the occasional crack. Luckily for the homeowner such cracks can be repaired. If you are handy you can purchase a do it yourself repair kit at your local pool specialty store.
form_title= Fiberglass Repair form_header= Repair the fiberglass in your home. Where is the fiberglass cracked?*= _  How old is the fiberglass?*= _  Have you had to get the fiberglass repaired before?*= () Yes () No
It would be easier to replace with a floating skimmer Check poolrite dragonfly
Pl go through the following links which have articles/ instructions about the process of fiberglass repair; these are highly educative and you can do it yourself- http://www.boatus.com/boattech/casey/17.htm; http://www.fibreglast.com/product/LC_007; AND http://www.onlinetips.org/fiberglass-repair-techniques
Need a product to repair crack in fiberglass underwater, and keep it from spreading.
I can, but it wouldn't be as pretty as when it was new. You could bring it to a body shop that does fiberglass repair. Of course, you could do it yourself with the proper equipment and some basic instruction. The process for repairing carbon fiber components is the same as for repairing fiberglass components. There are videos on youtube that show how to repair fiberglass.
When alluminium corrodes it needs to be replaced you cant repair it.
You can learn how to repair hull holes in fiberglass boats here: http://www.boatus.com/boattech/casey/17.htm
Use fibreglass repair kit (automotive). Works well.
It is always better to have a professional come in and do a repair if you are not familiar with the task. A professional is recommended because the material is fiberglass.
form_title=Find A Paintless Dent Repair Shop form_header=Fix dents in your vehicle by using a trusted repair shop. What caused the damage?=_ Will your insurance cover the repair?= () Yes () No Is the repair to be made on metal or fiberglass?= () Metal () Fiberglass () Other