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Fiberglass No Sand Primer

Do away with the need to sand before applying Interlux antifouling paint by using Interlux Fiberglass No Sand Primer YPA200. Fiberglass No Sand Primer is designed to eliminate the need to sand prior to applying antifouling paint to new or unpainted boats.
  • No sanding is required, before applying antifouling paint.
  • Perfect over Gelcoats, where sanding of the gelcoat may void hull warranties.
  • Less Labor intensive, only one coat of primer is required.
  • Strong chemical bond between primer and antifouling paint, when over coat window is meet.
  • Ease of application use.

Part No.

Description (Click to view & order)







Colour YPA200-Aluminum Gray
Finish Low Gloss
Specific Gravity 0.92
Volume Solids 25% 
Typical Shelf Life 2 yrs
VOC (As Supplied) 690 g/lt
Unit Size 1 US Quart 1 US Gallon



50F 77F 95F

Touch Dry [ISO] 2hrs 1hrs 30mins

Note:Touch dry time will vary with temperature and humidity. High humidity will cause Fiberglass No Sand Primer to dry more quickly.
Substrate Temperature
50F 77F 95F
Overcoated By Min Max Min Max Min Max Min Max

Note:Overcoating times will vary due to wide variations in temperature and humidity. The best method is to check the paint film using the "Thumb Print" test to determine when the Fiberglass No Sand Primer is ready to overcoat. If the primer feels tacky and you can leave a thumb print in the paint film without getting any paint on your thumb the Fiberglass No Sand Primer is ready for overcoating. Test the paint film in the area where you started, applying the primer 30 minutes after starting the application. Continue testing every 15 minutes using the "Thumb Print" test until reaching the Ready-to-Overcoat stage, then begin to apply Interlux antifouling immediately. Do not apply if the relative humdity exceeds 85% or if the temperature is above 95F (35C). Check primed surfaces using the "Thumb Print" test before overcoating with antifouling. If you cannot leave a thumb print in the Fiberglass No Sand Primer or it is "tack free" it is too late to overcoat and must be removed. Follow application instructions on the antifouling label for overcoating times of subsequent coats.

Preparation Prior to application of Fiberglass No Sand Primer all contamination such as mold release wax, oil grease, or blush from epoxy or vinylester resins must be removed.
BARE FIBERGLASS (POLYESTER OR VINYLESTER) OR EPOXY: Surface preparation is critical. It must be properly prepared to prevent delamination of the overcoating paint. Begin by applying Fiberglass Surface Prep YMA601 to the surface with a plastic scuff pad and scrub well. Flush with fresh water or wipe off with a clean, wet cloth ensuring that no traces of Fiberglass Surface Prep remain. As soon as the surface is dry apply Fiberglass Solvent Wash 202 using the 2-rag method. To be certain the contamination has been removed, run water over the surface. If the water beads up or separates, wipe the surface again with Fiberglass Surface Prep YMA601 or Fiberglass Solvent Wash 202. When the water sheets off, all contamination has be removed.
Sanding does not remove contamination.:

Method Apply one, thin, continuous coat of Fiberglass No Sand Primer using a " nap roller or natural bristle brush. Apply in one direction only, do not brush back and forth. Check primed surfaces using the "Thumb Print" test before overcoating with antifouling. Follow directions on antifouling label for subsequent coats.

Hints Mixing Stir well before use. Do not shake.
Cleaner Bare Fiberglass - Fiberglass Solvent Wash 202 or Fiberglass Surface Prep YMA601. Clean Up Solvent - Reducing Solvent 2316N.

Some Important Points Apply to clean, dry, properly prepared surfaces only. For use over fiberglass, gelcoat and epoxy primers. Product temperature should be minimum 10C/50F and maximum 29C/85F. Ambient temperature should be minimum 10C/50F and maximum 35C/95F. Substrate temperature should be minimum 10C/50F and maximum 35C/95F. Wear protective clothing and clean up paint spatters immediately. Paint left to dry on skin will be extremely difficult to remove and may take several weeks to wear off. Use a waterless hand cleaner before the Fiberglass No Sand Primer dries to remove from skin. Do not leave containers open during application. Once project is complete discard all remaining paint from paint trays or residue in containers. Do not apply at the end of the day if there is a risk of condensation/dew overnight. Do not apply Fiberglass No Sand Primer if the Relative Humidity exceeds 85% or Temperature exceeds 95F/35C.

Compatibility/Substrates Do not use Fiberglass No Sand Primer with Micron 66, VC 17m, VC 17m Extra, Fiberglass Bottomkote Aqua, Micron Optima, VC Offshore, Baltoplate or any other water based or vinyl antifouling paints.

Number of Coats 1 only

Coverage (Theoretical) - 535 (ft/Gal)

Recommended DFT 0.7 mils dry
Recommended WFT 3.0 mils wet

Application Methods Brush, Roller , DO NOT SPRAY
Performance Yacht Systems
919 Bay Ridge Road
Annapolis, MD  21403

Toll free: 1-877-379-2248
Local: (410) 267-8681


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