Archive for May, 2015


To:  Multi-Tech Products

The pedestal base on my vitreous china bathroom lavatory is broken into two pieces.  Do you have a product that I can use to glue them together?

Thanks,

Tom

 

To: Tom

Yes, you can use our Poly-Filler to glue vitreous china together.  You will need to prepare the surfaces to be joined by sanding with 220 grit wet/dry sandpaper.  It will set in about 3- 5 minutes.  If you need more time, you can refrigerate the Poly-Filler prior to use.  This will double the working time.  When completed, there will be a line at the joint.  This can be hidden using our MMA repair kit, which can be supplied in a color-matched coating.  The entire pedestal would need to be refinished to achieve a uniform color.  You will need to let us know the manufacturer of the lavatory, and their color name.  You will follow the directions shown in the MMA procedure, which is available in our website.

Thanks,

Rob Clos

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To: Multi-Tech Products

I have attached a photo of a hot tub installed in a hotel. It is a plastered spa, and large chips are coming off of the surface. Can it be salvaged using your FRL System?
Thanks,

Jim
untitled5

To: Jim

The quick, simple answer is yes, it can be used to renew the hot tub surface. However, before I give the complete answer on FRL resurfacing of a plaster finished hot tub, I want to address common issues with the practice of using fiberglass coatings over plastered swimming pools. Even though they are the same application, using a fiberglass coating on a plastered swimming pool brings much greater risks for failure than using fiberglass over plastered hot tubs.

There have been companies that specialize in a total refinish of pools by applying a fiberglass composite on top of the plaster. Therefore, there are a lot of these swimming pools in service today that have experienced a high rate of failure. Repairing these failed jobs have great appeal to repair technicians. Even complete pool resurfacing can be achieved with our FRL system. The larger the pool, the bigger the job, and bigger the pay check, right?  Our advice is don’t be quick to jump for that big pool job. Even though it might appear to be a great business opportunity, it is very risky to re-surface plastered swimming pools. Applying fiberglass resin systems over plaster does not always provide for resolution of the underlying issue, deteriorating plaster. These overlays of FRP usually fail as the plaster continues to deteriorate.

The explanation is that although advanced resins are utilized, and the top layer bond is great, adhesion between the different layers of fiberglass, plaster, and concrete base will decline. This leads to complete failure of the composite structure application. Some resurfacing will lose adhesion in big sections, and some will just have small areas that come loose. It is best to refer the major failures to a contractor that will completely re-plaster the pool. On the same note, the smaller failures provide the opportunity for repair professionals.

The following photos show one example of a swimming pool that had been completely over laid with fiberglass, and a partial repair was made, successfully. So, if the plaster has not become too brittle and chalky, a pool with small area(s) of failure can be repaired with the FRL System. It can provide a worthwhile extension to the life of the pool before a complete re-plastering is necessary. However, we would not recommend providing a warranty on these partial repairs.

2013-05-09 10.51.50 Before

2013-05-27 11.43.35After

Your hot tub can be refinished with our FRL system. It would require a complete resurfacing of the entire surface (nothing partial). Therefore, you should not commit without a prior inspection of the empty spa. Based on my analysis of your pictures, the glaze layer of the plaster is peeling. This layer is comprised of about .125″ thickness of the total original plaster finish. The glaze was created as part of the total installation process when the plaster was applied during the original construction.

The primary issue in resurfacing with any fiberglass product including our FRL system will be the ability to achieve prolonged adhesion to whatever you are applying it to – in this case the aged glaze or exposed plaster. But, if you re-surface the entire plastered hot tub, the FRL resin layer acts as a cap over the plaster, although it does rely on achieving a strong, long-term bond to the substrate. Hot tubs are smaller than pools so as the plaster layers deteriorate, the smaller bonding surface areas stay in place for the long-term. Ideally, the smaller volume allows for sufficient structural strength without the need for the strongest substrate composite integrity. Thus, it will stay in place and function correctly as a capped surface.

An inspection would be necessary to determine the condition of the plaster. Plaster fails by becoming brittle and chalky. The core plaster layer is under the glaze and on top of the concrete structure providing the shape of the hot tub. The primary cause for plaster becoming chalky, soft and brittle is from over-use of pool chemicals. So, you should remove the glaze in a few areas, and assess the condition of the plaster underneath, as well.

The FRL resurfacing procedure includes grinding and filling the substrate to assure smoothness, and provide a surface that allows the best possible bond with the FRL resin. That process will expose the core while leaving some of the glaze in place. If inspection confirms that the plaster is hard and shows little evidence of brittleness or chalkiness, then a re-surfacing with the FRL system would be advisable. One advantage of the FRL finish compared to a plaster surface is the ease of cleaning. The surface is much smoother, less porous and will be more durable.

Important Note: Resurfacing over peeling plaster is risky, and should be attempted only with everyone understanding the issues and potential for success or failure.

My experience is that plastered Hot Tub resurfacing with the FRL system has yielded long term adhesion and less call-backs when good judgment has been used during inspection and preparation for the refinishing stages. The same judgment should be used when establishing a warranty.

Rob Clos

TO; Multi-Tech Products

Wow, the before and after pictures of this hot tub are incredible. I’m amazed at how well it was repaired. Is an FRL system pretty common? Or do they use that on the newer hot tubs only? I’m just curious because I’ve got a pretty old hot tub that I need to get repaired.

Thanks Mia

To: Mia

If your hot tub is very old, 30 years or more, it is probably gel coat with a FRP backing, and installed in a cabinet or outside deck.  This type of product is suited well for resurfacing with the FRL system.  Refinishing a gel coat spa will give a permanent finish that will last 10 to 20 years.  The same applies to a spa made with an acrylic surface.  Acrylic spas were introduced in the early 1980’s, and quickly replaced gel coat products, due to superior performance.  These were offered as portable spas, but in-ground models were available.  Older plastered spas, which are frequently built with swimming pools, can also be resurfaced with the FRL system.

The pictures you referred to are actually a pool that was fiber glassed over plaster.  Fiber-glassing plastered pools and hot tubs is pretty common.  Companies that specialize in this service have come and gone over the years.  The business failures have been due to the liabilities from deterioration of plaster as described above.  Resins have improved over the years, which have made a difference in how long the new surface lasts.  But the main issue is that the plaster fails.  The FRL system is unique, and is designed for surface renewal.  It has proven performance in the right application.   See the above article for recommendations and limitations.  FRP is the acronym for Fiber Glass Reinforced Polyester.  This description encompasses a broad range of products with varying levels of quality.  The FRL system is designed to be used with numerous surfaces including acrylic, gel coat, ABS, and other spa surfaces.  We can refer you to a contractor that has been qualified to perform these applications.

Thanks,

Rob