How To Repair Gel Coat

Fix the scratches in your gunkhole's gelcoat that sometimes occur at the docks. Boating Magazine

Own a fiberglass boat long enough, and yous'll end up with a scratch, nick or gouge in the finish. It might exist from a muffed landing, a dropped pair of fishing pliers or merely a hole drilled in the wrong place. Yous tin can ordinarily fix gelcoat repairs yourself. It takes a flake of patience, but do it right and few will notice.

Complications occur when in that location'south damage on a textured surface similar diamond nonskid or on a multitone end. For these, call in a pro. Besides, deep gouges may need structural fiberglass work or filler earlier you repair the gelcoat. On horizontal surfaces, liquid gelcoat works, just for vertical surfaces, a paste is easier to utilize. The commencement step is identifying the end on your gunkhole.

Getting Started
Finish Time: i-two hrs
Skill Level: iii/five

Tools and Supplies
*Masking tape
*Mitt-held grinder and bits
*Countersink bit and drill motor
*Gelcoat resin and catalyst
*Coloring agents
*Acetone
*Mixing cups
*Stir sticks
*Latex gloves
*Dust mask
*Cleanup rags
*Putty knife
*Moisture/dry sandpaper (320-, 600- and 1,000 grit)
*PVA curing amanuensis
*Rubbing chemical compound
*Boat wax

You'll need to make full deep gouges with resin and filler earlier applying finish. Epoxy resin and fillers attach ameliorate than polyester products but cost more and require several extra steps prior to applying the terminate colour of either gelcoat or boat pigment. If you cull paint, topside alkyd enamels, polyurethanes and others are available from Interlux and Pettit.

How to Repair Gelcoat

Gelcoat Repair

Match the colour of the gelcoat. Canoeing Mag

ane. Match the Colour
For current boats, your dealer might exist able to supply matching gelcoat. But due to weathering on your boat, it may not match. There are kits from companies such as Evercoat with pigments to add to the resin for a match. If y'all take a sample, y'all can friction match a gallon of gelcoat from Rayplex Composites (fibreglass.com).

Gelcoat Repair

Clean up the edges where the gelcoat was damaged. Boating Mag

2. Clean Up Edges
Use a rotary grinder to smooth the edges to a 45-caste bevel and eliminate any loose fabric. If repairing a drilled hole, the surface might have become elevated from the upward pressure of an one-time fastener. Employ a countersink bit or rotary file and a drill motor to carefully grind abroad the swollen perimeter. Scrape away any former sealant and clean up with acetone.

Gelcoat Repair

Record off the surface area around the damaged gelcoat. Boating Magazine

3. Tape It Off
Carefully mask around the edges of the fiberglass boat repair area with two-inch-wide 3M ScotchBlue Multi-Surface Painter'south Tape No. 2090. Give yourself a 16th of an inch of unmasked margin effectually the scratch, gouge or pigsty. Also, mask off whatsoever adjacent areas or items to protect them from inadvertently applied gelcoat or errant sanding. Clean up the repair area again with acetone.

Mix the gelcoat with the hardener to ready for awarding. Boating Magazine

four. Mix the Gelcoat
Subsequently you have color-matched the amount of gelcoat needed for the repair, add together catalyst (aka hardener). Different gelcoat resins crave different catalysts, and so make sure you are using the proper formula, likewise as the right two-function ratio (e.g., four drops of catalyst per teaspoon of resin). Mix the two parts thoroughly with a stir stick to ensure that the unabridged batch will cure at the same time.

Apply the gelcoat to the damaged area. Boating Magazine

5. Apply Gelcoat
Use a small woods or plastic putty knife to spread the gelcoat smoothly over the gelcoat repair. You should have almost ten to 15 minutes of working time later on calculation the catalyst before information technology starts to harden and is no longer fluid. Fill the repair slightly higher than the surrounding surface to allow for sanding. If you don't plan to sand, make it even with the surrounding surface. Either way, spray it with a PVA curing agent.

Sand and smoothen the area with sand newspaper. Then employ gunkhole wax. Boating Magazine

half-dozen. Sand It Out
Peel off the PVA. Wet-sand the cured gelcoat with 320-grit wet/dry paper on a soft sanding block. Confining work to the firsthand repair area, continue wet-sanding with 600-grit newspaper until nigh even with surrounding gelcoat. Finish wet-sanding with 1,000-grit paper; then buff out with rubbing compound followed by a coat of wax. If not sanding, just pare off the PVA and apply wax.

Source: https://www.boatingmag.com/how-to-repair-damaged-gelcoat/