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Interlux Fiberglass Surface Prep is the first step in a 2 step system for removing mold release agents (wax) from gelcoat prior to application of antifouling boat bottom paint. It is also great at removing contamination, amine blush and cleaning previously painted surfaces before repainting. A pigmented formula acts as a guide during the cleaning process. The new low V.O.C. formula is safer and more environmentally friendly.
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Fiberglass Surface Prep is a mold release agent and wax remover, which precludes the need for sanding bare fiberglass when used with Fiberglass No Sand Primer.
The abrasive properties of the Fiberglass Surface Prep thoroughly cleans the gelcoat and provides key for Fiberglass No Sand Primer.
The use of Fiberglass Surface Prep to remove these contaminants is extremely important if the full adhesive qualities of Fiberglass No Sand Primer are to be realized.
Fiberglass Surface Prep can also be used to remove Amine Blush from clear epoxy and clean previously painted surfaces when prepping to repaint.
Fiberglass Surface Prep applies easily with a Scotch-Brite pad. Rinse with fresh water or wipe clean to remove.
what is the procedure fro using on a prepainted bottom
Apply Fiberglass Surface Prep YMA601 to a damp sponge or 3MÂ®Â maroon Scotch-BriteÂ®Â pad. Then scrub the surfaceto be cleaned using moderate pressure. Wipe off with a clean, wet cloth ensuring that no traces of Fiberglass SurfacePrep YMA601 remain. Repeat until all residue is removed, changing cloths frequently. As soon as the surface is dry, it isready to paint. Before application of the primer it is very important that all contamination has been removed. To be certainthe contamination has been removed, run water over the surface, if the water beads up or separates, wipe again withFiberglass Surface Prep YMA601. If more than 4 hours pass without overcoating wipe with a clean wet cloth and allowto dry.Hints Mixing Stir or shake contents thoroughly before use.Other Fiberglass Surface Prep will not remove serious surface defects
JD Tech Team
Can I use Interprotect epoxy primer instead of the no sand primer after using this surface prep?
Call interlux! They were very helpful. Complicated stuff to work with. It took 2 to 3 weeks for the paint to set here in Vermont. We were afraid we had screwed something up.
Works, is easy, and relatively clean.
Fiberglass canoe restoration. The interior was bare fiberglass, probably with polyester resin, with previous house paint stripped off. The FSP was used just before automotive urethane. Toxicity was low, akin to TCP. It appears to have pumice in it and a mild sudsing action. I used the red Scotch-brite but didn't have to rub very hard. After rinsing there were no bead areas so it appeared to work. Also, the urethane appears to have adhered well.
San Diego, CA
Not what I expected. Messy and thick, like brown soft scrub
Easy to remove wax and amine blush
YMA601 is the best product I have found for removing mold wax from gelcoat before applying bottom paint. On a new boat the wax is there even if you can't see it. Fiberglass Surface Prep when scrubbed with a scotchbrite pad skuffs up the gelcoat a little helping the paint to stick better.