Triumph Boat FAQ

We thought it would be helpful to put together an article with a number of the Frequently Asked Questions about Triumph Boats. If you think of others you'd like to see added let us know.

1) How do I get my boat registration numbers to stick to my Triumph hull?

A light coat of a product 3M makes called 94 Primer should be wiped onto the area where decals will be applied. Allow this to evaporate before applying the registration decals. You can purchase 3M 94 Primer online or possibly from a former Triumph Dealer like Merritt Marine.

2) How can anti-fouling paint be applied to the bottom of a Roplene® boat?

Materials Required:

Oil based bottom paint (Pettit - Trinidad,
Interlux-Bottom Kote, or similar)
3M 94 Primer
Lacquer thinner
Clean Rags
Masking tape
Brush and rollers

Tools Required:
Random orbit sander with 80 grit paper
Propane torch

Painting the bottom is easiest with the boat upside down or suspended in the air. Identification of the water line is best done by placing the fully rigged and loaded boat in the water and noting the location of the water line. Mark the location of the water line with masking tape and lightly sand the boat up to the tape line using the random orbit sander. Try only to scuff the surface. Wipe the bottom of the boat clean with lacquer thinner. Caution! Be sure that the lacquer thinner and any rags with lacquer thinner are put away and clear of the boat.

In order to improve adhesion to polyethylene it helps to flame treat the surface. This is a very simple process where the blue oxidizing portion of the flame is quickly passed over the hull. The motion of the torch should be constant and not linger in one spot. A one square foot area can be treated in about 5 seconds. The objective is not to melt the plastic, but to flash off the surface. It is much like spray painting - keep moving.
As soon as you are done flame treating the surface, wet a rag with the 3M 94 Primer and wipe it over the hull. The primer goes on in a very light coat and dries in seconds. Do not put too much on or go over an area too many times.

The bottom is now ready for bottom paint. No additional preparation is necessary and paint can be applied immediately. Follow the application instructions on the can of paint.

3) How can I remove rust stains from my boat?

We have found that Krudd Kutter Brand The Must for Rust, Rust Remover and Inhibitor works very well for removing stains. It can be found at most home improvement centers.

4) What if the bottom is not painted?

Grass, green algae and barnacles can attach to the surface. Any growth that does attach to the bottom can be removed with a stiff brush or pressure washer. If barnacles attach, allow them to completely dry with the boat out of the water. They can then be scrapped off with a piece of wood or with a pressure washer. They also can be cleaned in the water with a plastic putty knife.

5) How are the hull and deck joined?

The entire boat is molded in one piece, therefore, there is not a joint seam that can leak below the rub rail. There is a parting line where the two parts of the mold come together and separate.

6) What happens if I hit a dock or a rock with the boat?

The boat will flex and absorb the impact instead of cracking, splitting or denting like an aluminum or fiberglass hull. (A test ride is a good time to demonstrate how the boat absorbs the impact of beating into waves or rough, choppy water).

7) What if the boat is scratched?

Since there is no gel coat, the color is solid all the way through, much like a Corian® countertop. For a small scratch, simply sand the scratch out, starting with 400 grit sand paper and then finish sanding with 800 grit. This will leave the surface dull. Bringing the shine back to the boat can be done in two ways.

8) Can the sheen be restored after sanding?

Yes. Polish with a dry, clean buffing pad and an electric buffer. Buffing action will create heat that will bring the sheen back to the surface. Be careful, however, not to overheat an area as this can cause discoloration.

9) How do I repair a large gouge or hole in a Triumph Boat hull?

Large abrasions or holes can be filled with a plastic welder and Roplene welding rod material. Once the area has been filled it can be sanded smooth using the same procedures outlined above.

10) What sealant will stick to my Triumph Boats Roplene® hull?

Rule Elastomeric Sealant works best at providing adhesion and sealing. It is available at many marine supply stores and at Wal-Mart. Silicone, 5200, polyurethane or polysulfide sealants should not be used.

11) If a screw pulls out of the Triumph Roplene® material, how do I replace it?

With a Roplene®-constructed boat, the repair is fairly easy. Simply heat the screw over a torch flame while holding with appropriate pliers. Then dip the screw when hot into polyethylene powder (supplied by a former Triumph Boats dealer or online) and insert it back into the hole. Hold the screw in place for a few minutes while it cools. The heat from the screw will weld the screw back into place.

12) How do you clean and maintain a Triumph Hull?

Most of us owners have found that using either a drive through car wash or buying a little electric 1800 psi pressure washer works wonders on these hulls. Many of us use our boats in salt water all the time, so we pull out the pressure washer and just rinse everything off on the trailer after each trip. Just be careful spraying around stickers since the pressure washer can peel them up from the hull. Various cleaners make washing up the hull a cinch. Products like Simple Green, Soft Scrub, Mr. Clean Magic Erasers (for tough spots), Greased Lightning, etc. make cleanup easy, but a stiff brush and/or a power washer will take care of most cleanup. Occasionally, "black spots" may appear on the deck. A power washer will remove these.

You may find some tips with some new products in this thread as well: Helping Keep Your Boat Clean

13) Will cold weather damage a Triumph Hull?

Triumph Boats tests Roplene® material against damage or breakage using a 9 lbs. dart about the diameter of a AA battery. This test is done after the material is cooled to -40 degrees below zero for at least 1 hour. There should be no problem with the cold, however the boat should be winterized as any other. Make sure the lines are cleaned out of water and the bilge is dry so the pumps do not get damaged by water freezing in the bilge.

14) What is the projected UV (ultra-violet) life span of a Triumph Boat?

Triumph used a proprietary blend of UV inhibitors and anti-static additives to the PE prior to molding. Holding up to UV was part of the hull warranty.

15) Is the front and rear deck material the same material the boat is made of (Roplene)?

The sheet material used for floors, decks, and hatches is High Density Polyethylene(HDPE) that is extruded into sheet form and the boat was rotationally molded from Linear Low (med) Density (LDPE) Polyethylene. They have very similar properties in terms of strength and thermal expansion. The HDPE is a little stiffer but does not have quite as good impact strength.

16) Can you use davits with a Triumph Roplene boat?

Triumph boats were not designed to go onto davits as they are not properly supported while being stored on them. However if an owner needs to lift the boat to move it to a storage unit (which should have the proper bunk support), then it is suggested to use the bow and stern eye. But this is for temporary movement only and not for long term storage.

17) Can you store a Triumph Boat on rollers or do you have to use bunks per the factory schematics?

It is recommended to stay away from rollers because they only support the hull along a single line at the tangent of the roller. This type of concentrated stress can cause bottom distortion. Bunk trailers and lifts offer much more surface area and, when properly set up, ensure problem free support of the Roplene hull.

NOTE: Triumph bunk schematics are available for Premium Members to download from our Resources link above.

18) What is the status of Triumph Boats?

Triumph Boats filed for bankruptcy in 2009. Subsequently, the Triumph brand was sold and moved to Little Falls, MN in the Spring of 2010 and became part of the Larson Boat Group that includes Larson, FinCraft and SeaSwirl. In November of 2017 Larson announced the closing of its Little Falls manufacturing plant after 100 years of operation. At the same time they announced they were ending production of the Triumph Boat line. If someone purchases the Triumph Boats brand and begins operation again we will let you know here. At this point it appears to be unlikely.

19) Do I need a boat cover?

This depends on where the boat is going to be stored? If you are going to store any boat outside, seriously consider purchasing a boat cover for it. Contrary to some Internet "static" Triumph Boats will not melt in direct sunlight. On the contrary, Triumph Boat hulls are tough and were molded with UV inhibitors for strength and durability. It is just much easier if you clean the boat after each use and then cover it to keep it clean for the next time you use it. This saves a lot of time that you would otherwise spend cleaning it up again. Also by putting a quality cover on your boat, things like gauges, CD decks, and etc. stay drier and therefore will last longer. It is also recommended to cover the engine to help keep bugs, birds and mice from making nests in them when not being used.

20) Which Boat Model should I buy?

Choose the boat size and features that best suits you and your family needs the best. Now this is not always an easy decision, but do not make the mistake of getting a hull configuration for a low ratio of use. In other words, if fishing is what you will be doing 80% of the time then get the model that will work for your fishing needs and adapt for the other 20% of planned use.

21) Are Triumph Boats environmentally friendly?

Triumph Boats were produced using a zero-emissions manufacturing process. The hull is also 100 percent recyclable. It can be reground and made into another polyethylene product. Triumph Boats used only 100 percent virgin material with UV inhibitors for strength and longevity.

22) Can I rig anything on the boat such as cup holders, rod holders, antennae, etc.?

Yes. In fact, it is similar to adding accessories to FRP (Fiberglass Reinforced Polymer). Most items should be fastened to the material using self-tapping stainless steel screws. Make sure to bed or coat fasteners with Rule (Sudbury) Elastomeric Sealant. If it is an item that will see large loads, you can fasten to the hull using a Toggler toggle bolt, a stainless steel anchor, that is permanently fastened in the hull. Many marine suppliers carry these. If the item needs further support, you can cut a hole for an access plate and back up the installation with a backing plate. We recommend you call the factory or your dealer to make sure you are not in an area where damage might occur to plumbing, electrical or fuel systems. Note: Toggler's have a pull-out force of about 400 lbs.

23) How are cleats, bow eye and stern eyes attached?

Hardware is mounted using molded-in inserts. These inserts are chrome plated stainless steel, have a backing flange and are molded right into the boat. The pull-out force for each insert is up to 1,200 lbs.

24) What type of foam is used in Triumph Boat hulls?

Triumph used two different density, closed cell, polyurethane foams. In the transoms we used 20lb per cubic foot, high density for strength to help support the motor. The rest of the boat is filled with a 2.5 lb per cubic foot foam for flotation. Both of these foams are "two part" that are mixed at the gun and create the foaming reaction and also result in the closed cell foam. I don't know of any single part foams that are closed cell. Great Stuff, sold at home improvement stores is not closed cell and will absorb water. 2 part polyurethane kits can be bought on line but are several hundred dollars per kit.
Last edited:
Randy Durham

Randy Durham

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