bare fiberglass bottom paint guide

SYSTEM 3: SANDING METHOD

2. Sand the hull thoroughly using 80-grit sandpaper. Remember to change sand paper frequently.

Painting bare fiberglass, Polyester, Vinylester gelcoats or epoxy resin.

3. Repair all scratches, nicks and dings by sanding those area with 80-grit sand paper then remove the sanding residue using Fiberglass Solvent Wash 202. Fill the repair areas with Interlux Watertite Epoxy Filler. After Watertite is cured sand repaired area with 80-grit sandpaper until areas are smooth. Remove sanding residue using Fiberglass Solvent Wash 202.

Use this system when painting new boats or where old antifouling paint has been removed. 1. Now that the hull has been properly prepared as per the Boat Hull Preparation instructions on page 2 proceed to step 2.

4. Apply two coats minimum of Interlux antifouling paint.

Remember prior to sanding the hull, hull cleaning is very important. Sanding heats any remaining wax on the surface, and then pushes it into the open pores in the gelcoat. This will keep any antifouling paint or primer you apply from adhearing.

An important consideration to help protect against osmotic blistering of the gelcoat is the application of the Interprotect System.

ASSOCIATED PRODUCTS No Sand Primer

202

Fiberglass Solvent Wash – To clean bare fiberglass prior to application.

216

Special Thinner - To clean previous painted areas.

Fiberglass Surface Prep – Water based abrasive cleaner for bare Fiberglass. Reducing solvent – For clean up. Brushing Reducer – For thinning and clean up. Watertite Epoxy filler.

2316N 2333N YAV135KIT INTERLUX ANTIFOULING Check compatibility.

HOW MUCH PAINT DO I NEED? Determining how much paint you will need is fairly simple. The estimated surface area in the chart below is based on the average boat size and type so actual square feet can vary. It is best to actually measure the wetted surface area of the hull. If it is difficult to do, a close approximation can be made by multiplying the length overall, times the beam, times 85%

(LOA X Beam X .85 = wetted surface area). Then divide the wetted surface area by the square foot coverage per gallon, of the product you are using. The result is the number of gallons needed for 1 coat. See product cans for per square foot coverage per gallon.

FIBERGLASS NO SAND PRIMER

BARE FIBERGLASS BOTTOM PAINT GUIDE

1 COAT

INTERPROTECT 2000E/2001E 4-5 COATS

ANTIFOULING PAINT 2 COATS

18' Power & Sail

120 Sq. Feet

1 Quart

2 gallons

.5 gallons

21' Power & Sail

150 Sq. Feet

1.15 Quarts

2.5 gallons

.75 gallons

28' Power & Sail

240 Sq. Feet

1.8 Quarts

4 gallons

1.25 gallons

31' Sailboat

270 Sq. Feet

2 Quarts

4.5 gallons

1.3 gallons

32' Sportfish

300 Sq. Feet

2.25 Quarts

5 gallons

1.5 gallons

36' Cruising Sailboat

330 Sq. Feet

2.5 Quarts

5.5 gallons

1.65 gallons

36' Powerboat

350 Sq. Feet

2.60 Quarts

5.75 gallons

1.75 gallons

41' Cruising

435 Sq. Feet

3.25 Quarts

7.25 gallons

2.2 gallons

42' Powerboat

500 Sq. Feet

3.75 Quarts

8.5 gallons

2.5 gallons

53' Cruising Sailboat

590 Sq. Feet

4.5 Quarts

10 gallons

3 gallons

53' Powerboat

650 Sq. Feet

4.85 Quarts

10.75 gallons

3.25 gallons

®

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bare fiberglass bottom paint guide

® are registered trademarks of Akzo Nobel.

Products marked ® are registered products of International Coatings Ltd.

International Paint, Inc. 2270 Morris Avenue Union, NJ 07083

Technical Assistance 1-800-468-7589 Published: April 2003

SKU: BFG03

Use this guide if you have a bare fiberglass, gelcoat or epoxy resin hull. The first thing you will need to do is choose a system to paint below the waterline with Interlux antifouling paint. Interlux has three systems to choose from No Sand Method, Interprotect Blister Prevention Method and a Sanding Method. Review the feature and benefits of each system and choose the best system for you. All three systems are easy for “Do It Yourselfers” to complete. But if you are not sure of your own capabilities or just not comfortable doing this type of work just consult your local Interlux Boatyard or Dealer. For a location near you visit www.yachtpaint.com

NEW!

SYSTEM 1 NO SAND METHOD • Sanding is eliminated, before applying antifouling paint. • Perfect over gelcoats, where sanding of the gelcoat may void hull warranties. • Only one coat of primer is required. • Strong chemical bond between primer and antifouling paint, when overcoat window is met. • Easy to apply

SYSTEM 2 INTERPROTECT BLISTER PREVENTION • Easy application by "Do-It Yourselfers" or professionals.

FIBERGLASS NO SAND PRIMER

•

Fiberglass No Sand Primer eliminates the need to sand prior to applying antifouling paint to new or unpainted boats.

•

Recommended for new boat hulls, where sanding of the gelcoat may void manufacturer hull warranties.

•

•

• Fast drying enabling a complete application in just days. • Interprotect® is the only Blister Protection and Prevention coating that uses Microplates®. Microplates® are a water barrier system similar to shingles on a roof, eliminating water intrusion. • Interprotect® is a seal of approval for a future owner that the boat has been protected from future blister repair costs. This means added value and confidence to the buyer.

SYSTEM 3 SANDING METHOD • Provides a mechanical bond between boat hull and paint. • Cost effective. • Simple system clean, sand, clean and apply antifouling paint.

CONTENTS New Fiberglass No Sand Primer


YMA601

YPA200

BOAT SIZE & TYPE

®

TECHNICAL BULLETIN #200

2000E/2001E Blister prevention system

BOAT ESTIMATED SURFACE AREA

®

1

Systems to Paint Bare Fiberglass Bottoms 1 Boat Hull Preparation

2

When properly overcoated with Interlux antifouling paint, the primer and antifouling paint will chemically bond together, ensuring excellent adhesion.

No Sand Primer System

2

Interprotect System

3

Sanding System

4

It may be used on bare gelcoat (polyester or vinylester) and epoxy primed surfaces, and is compatible with most Interlux antifouling paints.

Painting Tips

4

Associated Products

4

How Much Paint do I need?

4

1

Since the boat has never been painted, take extra care and time in preparing the bottom before proceeding to the system of choice. Whether the boat is new or a few years old “Mold Release Wax” and other contaminants like dirt, grime, dust, oils and even road salt and dirt can be present on the bottom of the boat. It is important to properly prepare the bottom of the boat before proceeding to the Bottom Paint Systems.

scrub only a few square feet at a time. Rinse well with plenty of fresh water. Start cleaning the hard to reach areas first and pay extra attention to those tough areas because those often are the areas most neglected when cleaning.

For new or non-blistered hulls. Use this system on new boats or used boats where all antifouling paint has been removed.

Try dividing the hull into sections with tape or a grease maker. Then clean one section at a time. This method assures you do not overlook areas on the hull.

Remove all contaminants and “Mold Release Wax” on the surface as follows.

3. Using the two rag method dampen one cheesecloth with 202 Solvent Wash. Wipe surface thoroughly to soften and dissolve the "Mold Release Wax". Use a second clean dry cheesecloth rag to remove the wax before the liquid dries. Be sure to change rags frequently.

1. Scrub the surface thoroughly using soap and water and a stiff brush. Flush with fresh water to remove soap residue and allow surface to dry.

4. Lightly spray the surface with water to insure all contamination has been removed. If water beads up or separates, wax is still present. Repeat steps 2 and 3.

2. Next scrub the surface thoroughly using Interlux Fiberglass Surface Prep YMA601 and a Scotch-Brite® pad. If Interlux Fiberglass Surface Prep YMA601 is not available use an abrasive powder cleaner. Scrub the surface thoroughly and

At this point all mold release agents, wax and other contaminants should have been removed. Proceed to one of the following No Sand Method, Interprotect Method or Sanding Method.

SYSTEM 1: NO SAND METHOD

"Thumb Print” Test until reaching the "Ready-to-Overcoat" stage. Immediately, begin to apply the Interlux antifouling paint once the primer has reached the "Ready-to-Overcoat" stage.

Bottom painting bare fiberglass, Polyester or Vinylester gelcoats or epoxy resin 1. Follow the Boat Hull Preparation instructions on this page. 2. Using a 1/8 inch foam or 1/4 inch mohair solvent resistant roller, apply one thin continuous coat of Fiberglass No Sand Primer, apply in one direction only without recoating. BARE FIBERGLASS BOTTOM PAINT GUIDE

3. Only one coat of Fiberglass No Sand Primer is required. Antifouling overcoat times will vary due to wide variations in temperature and humidity. The only safe method to determine when the Fiberglass No Sand Primer is "Ready-to-Overcoat" is to check the paint film using the “Thumb Print” test. If the primer feels tacky and you can leave a thumbprint in the paint film with out getting any paint on your thumb, the Fiberglass No Sand Primer is "Ready-to-Overcoat". Test the paint film in the area you started applying the primer no later than 30 minutes after starting the application. Continue testing every 15 minutes using the

SYSTEM 2: INTERPROTECT BLISTER PREVENTION METHOD

1. Follow boat hull preparation procedures as per instructions on page 2. 2. Sand the gelcoat thoroughly using 80-grit sandpaper. Remember to change sandpaper frequently. 3. Remove the sanding residue using Fiberglass Solvent Wash 202. 4. Repair all scratches, nicks and dings by sanding those areas with 80-grit sandpaper than remove the sanding residue using Fiberglass Solvent Wash 202. Fill the repair areas with Interlux Watertite Epoxy Filler. After Watertite is cured sand with 80-grit sandpaper until smooth. Remove sanding residue with Fiberglass Solvent Wash 202. 5. Mix thoroughly both 2000E base and 2001E reactor prior to mixing together. 6. Mix three parts 2000E base to one part 2001E reactor, by volume and allow to induct for twenty minutes prior to use. Mix only what can be used in five hours.

Waterline

Interprotect® Interprotect®

• Apply one thin coat, recommended WFT 3.0 mils wet; Fiberglass No Sand Primer may not hide the gelcoat completely when applied properly.

Interprotect® Interprotect®

• Fiberglass No Sand Primer cannot be used with the following Interlux antifouling paints: VC17m Extra, VC17m, VC Offshore, Baltoplate, Micron 66, Micron Optima or Fiberglass Bottomkote Aqua. Do not use with any water based or vinyl based antifouling paints. • Fiberglass No Sand Primer is moisture sensitive. Do not leave containers open during application. Once project is complete discard all remaining Fiberglass No Sand Primer. • Do not apply Fiberglass No Sand Primer if the relative humidity exceeds 85% or if temperature exceeds 95o F (35o C).

Antifouling Paint

8. Apply Interlux antifouling paint following the overcoat windows listed on Interprotect® 2000E/2001E can. If maximum dry times are exceeded between the last coat of Interprotect® 2000E/2001E and the first coat of antifouling, apply another coat of Interprotect® 2000E/2001E and then be sure to hit the proper over coating interval before the application of the antifouling paint. These overcoat times do not apply to performance or vinyl antifouling such as VC17m Extra, VC17m, VC Offshore, Baltoplate and VC Performance Epoxy. To apply performance or vinyl antifoulings apply at least one extra coat of Interprotect® 2000E/2001E and allow to dry 24 to 36 hours. Then sand with 80-grit sandpaper. Be careful to leave at least 10 mils dry film thickness of epoxy after sanding. Apply the performance or vinyl paint of choice.

Interprotect® is the only Blister Protection and Prevention coating that uses Microplates. Microplates use a water barrier system similar to shingles on a roof, eliminating water intrusion.

Interprotect® Application Reference

• When applying No Sand Primer to larger boats or surface areas where overcoat times cannot be met, please call Interlux for Technical Assistance 1-800-468-7589.

7. Apply Interprotect® 2000E/2001E and continue on with corresponding coats following overcoat windows listed on the can of Interprotect® 2000E/2001E. Apply enough Interprotect® 2000E/2001E to build a 10 mil (.010 inch) dry film thickness. This usually takes 4–5 coats but the final dry film thickness is more important than the number of coats.

The Interprotect® Microplates Formula provides: • Fast drying, easy application • A barrier in the epoxy coating to reduce water damage to your hull • Sag resistance to insure the elimination of sags and runs during application

Antifouling Paint

Interprotect® has been the product of choice for Boat Builders and Repair Yards since 1985.


BOAT HULL PREPARATION

FOR DETAILED TECHNICAL INFORMATION ON INTERPROTECT Please call Interlux Technical Assistance Help Line at

No Sand System Reference Waterline

1-800-468-7589 or send an email to [email protected] for an auto responded reply that contains Technical Bulletin #900E

No Sand Primer Antifouling Paint

2

®

"Thumb Print" test

Antifouling Paint

®

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