How To Repair Large Fiberglass Hole

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

Own a fiberglass gunkhole long enough, and you'll end up with a scratch, nick or gouge in the finish. It might be from a muffed landing, a dropped pair of fishing pliers or just a pigsty drilled in the wrong place. You can ordinarily fix gelcoat repairs yourself. It takes a bit of patience, but do it right and few will discover.

Complications occur when there's damage on a textured surface like diamond nonskid or on a multitone cease. For these, call in a pro. Too, deep gouges may need structural fiberglass work or filler before you repair the gelcoat. On horizontal surfaces, liquid gelcoat works, but for vertical surfaces, a paste is easier to utilize. The first step is identifying the cease on your boat.

Getting Started
Finish Time: 1-2 hrs
Skill Level: 3/5

Tools and Supplies
*Masking tape
*Hand-held grinder and bits
*Countersink scrap and drill motor
*Gelcoat resin and catalyst
*Coloring agents
*Acetone
*Mixing cups
*Stir sticks
*Latex gloves
*Dust mask
*Cleanup rags
*Putty pocketknife
*Wet/dry sandpaper (320-, 600- and 1,000 dust)
*PVA curing agent
*Rubbing chemical compound
*Boat wax

You'll demand to fill deep gouges with resin and filler before applying finish. Epoxy resin and fillers adhere meliorate than polyester products but price more and crave several actress steps prior to applying the stop color of either gelcoat or gunkhole pigment. If you cull paint, topside alkyd enamels, polyurethanes and others are bachelor from Interlux and Pettit.

How to Repair Gelcoat

Gelcoat Repair

Lucifer the color of the gelcoat. Canoeing Magazine

1. Friction match the Color
For electric current boats, your dealer might exist able to supply matching gelcoat. Just due to weathering on your boat, it may not friction match. At that place are kits from companies such every bit Evercoat with pigments to add together to the resin for a match. If you accept a sample, you can match a gallon of gelcoat from Rayplex Composites (fibreglass.com).

Gelcoat Repair

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

2. Clean Up Edges
Employ a rotary grinder to smooth the edges to a 45-degree bevel and eliminate any loose textile. If repairing a drilled hole, the surface might have become elevated from the up pressure level of an old fastener. Employ a countersink fleck or rotary file and a drill motor to advisedly grind abroad the swollen perimeter. Scrape away any old sealant and clean upwards with acetone.

Gelcoat Repair

Tape off the area around the damaged gelcoat. Boating Magazine

iii. Record Information technology Off
Advisedly mask effectually the edges of the fiberglass boat repair area with two-inch-wide 3M ScotchBlue Multi-Surface Painter's Tape No. 2090. Give yourself a 16th of an inch of unmasked margin around the scratch, gouge or hole. As well, mask off any 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 prepare for application. Boating Magazine

four. Mix the Gelcoat
Later on you take color-matched the corporeality of gelcoat needed for the repair, add catalyst (aka hardener). Dissimilar gelcoat resins require unlike catalysts, and so make sure you are using the proper formula, as well every bit the right ii-role ratio (e.g., four drops of catalyst per teaspoon of resin). Mix the two parts thoroughly with a stir stick to ensure that the entire batch volition cure at the same fourth dimension.

Utilize the gelcoat to the damaged area. Boating Mag

5. Apply Gelcoat
Use a small woods or plastic putty pocketknife to spread the gelcoat smoothly over the gelcoat repair. Yous should have about 10 to 15 minutes of working time after calculation the catalyst before information technology starts to harden and is no longer fluid. Make full the repair slightly higher than the surrounding surface to allow for sanding. If you don't program to sand, go far fifty-fifty with the surrounding surface. Either style, spray it with a PVA curing agent.

Sand and polish the area with sand paper. Then use boat wax. Boating Magazine

half dozen. Sand Information technology Out
Peel off the PVA. Wet-sand the cured gelcoat with 320-grit wet/dry paper on a soft sanding cake. Confining work to the immediate repair expanse, go along wet-sanding with 600-grit paper until virtually even with surrounding gelcoat. Finish wet-sanding with 1,000-grit newspaper; then buff out with rubbing compound followed by a glaze of wax. If non sanding, just skin off the PVA and apply wax.

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

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