Gelcoat Brushing (Unwaxed) ISO/NPG Grade
Gelcoats are WATERPROOF and UNWAXED they are safe for use Below the Water Line.
Used to repair chips, deep scratches, dock dings, pinholes and gouges in fiberglass gelcoat on:
- Boats & RV Cowlings
- Sail and Paddle Boats
- Pools & Hot Tubs Showers, Sinks
Instructions: Click the link above for full application instructions.
Video: See the informational video below.
Tinting: For colour tinting, use Rayplex Color Pigment.
Hardener Required: All gelcoats require Hardener/Catalyst (sold separately).
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Used for repair work and interior coating, a basic for hand lamination.
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Used for repair work and interior coating, a basic for hand lamination.
Application Details
Repair work, Part Fabrication. Interior coating, a basic for hand lamination.
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Uses:
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Features:
Contains UV Protectants ISO/NPG GRADE, Water Proof use below the water line
ISO/NPG grade use below the water line.
Color Match with Rayplex Pigments.
Cures in 45 minutes to 4 hours, temperature dependent.
UV Stabilized for durable weather properties.
Use no less then 1% MEKP , no more then 2.5% MEKP.
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Commerce:
Ships Same Business Day
Payment Secure Transaction
Ships from Rayplex.ca
Returns Returns Policy
Support Email support
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Add On Products:
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Requires
2 x 125ml Catalyst
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Use with 37503 Catalyst
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Use with 37505 Catalyst
Requires
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Requires
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Use with 37501 Catalyst
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Use with 37503 Catalyst
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Use with 37505 Catalyst
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Rayplex #372 Patching gelcoat is used for fiberglass boat maintenance and repair. Gelcoat is the outer layer of a fiberglass boat's hull or surface and provides both a protective and aesthetic finish. Over time, it can become damaged or develop cracks, chips, or other imperfections that need to be patched or repaired. Here's a general guide on how to patch gelcoat using our extra thick no sag patching gelcoat.
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Rayplex extra thick patching gelcoat" refers to a type of gelcoat used for repairing and patching fiberglass surfaces, typically in marine applications such as boats and watercraft. Gelcoat is a thick, pigmented resin that is applied to the surface of fiberglass to provide protection, color, and a smooth finish.
When the term "extra thick" is used, it usually means that the gelcoat formulation has been modified to have a higher viscosity or density, making it thicker and more suitable for vertical or overhead applications where it needs to adhere and stay in place without sagging.
Using extra thick patching gelcoat can be beneficial in scenarios where you're dealing with deeper scratches, dents, or areas that need significant repair. The increased thickness helps in building up layers for a smoother finish. Keep in mind that working with thicker gelcoat might require some adjustments to your application technique, as it may not level out as easily as regular gelcoat.
Please send a sample of the gelcoat surface to be matched, with a minimum size of 1 in. × 1 in.
The sample will be returned with the matched product.
Please allow 2–3 weeks for custom color matching.
Available in 1-gallon or 5-gallon quantities.
COLOR MATCHING from C Lab color numbers
We Can also Match from Behr Paint Color Number
Available in 1 Gallon & 1 Liter QTY
New Matching Option
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Select size for pricing:
DG fees applies to:
Catalyst 125ml x 2 50% (goes with 20L)
Catalyst 8Lb 50%
10 Reson to have a custom Tee Shirt.
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Boost Your Professional Image — Wear Your Company Name with Pride.
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Look Like the Pro You Are — Custom Company Name on the Front, Rayplex on the Back.
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Show Customers You Mean Business — Branded Workwear That Builds Trust.
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Stand Out on the Job — Clean, Professional, Branded Rayplex Tee Shirts.
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Your Name. Your Brand. Your Reputation — All on One Professional Shirt.
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Make Every Jobsite a Marketing Opportunity — Wear Your Company Name.
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Professional Appearance Builds Confidence — Start with a Rayplex Custom Tee.
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Look Organized. Look Skilled. Look Professional — Custom Printed Rayplex Shirts.
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Your Crew Looks Better, Your Business Looks Better — Branded Workwear That Works.
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From Shop Floor to Jobsite — Professional Apparel That Shows You’re the Expert.
Rayplex Custom Printed Tee Shirt — Professional Workwear That Builds Trust
A clean, professional appearance tells customers they’re dealing with a true expert. The Rayplex Custom Printed Tee Shirt gives your team the polished look that sets you apart. Your company name is printed boldly on the front, and Rayplex is printed on the back, showing customers you use trusted, industry‑leading materials.
Rayplex Custom Printed Tee Shirt — Professional Workwear That Builds Trust
A clean, professional appearance tells customers they’re dealing with a true expert. The Rayplex Custom Printed Tee Shirt gives your team the polished look that sets you apart. Your company name is printed boldly on the front, and Rayplex is printed on the back, showing customers you use trusted, industry‑leading materials.
Made from durable, comfortable fabric, these shirts are ideal for marine repair, RV service, auto body, fiberglass fabrication, and industrial maintenance. Whether you’re on the shop floor or at a customer’s jobsite, your branded tee reinforces confidence, professionalism, and pride in your work.
Key Benefits
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Enhances your professional image the moment you walk in the door
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Builds customer trust by showcasing your company name clearly
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Shows you use Rayplex products, reinforcing quality and credibility
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Perfect for crews, technicians, and fabricators who want a unified look
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Comfortable, durable, and easy to clean — made for real work environments
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Turns every jobsite into a marketing opportunity
Ideal For
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Repair shops
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Mobile technicians
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Fabricators
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Marine, RV, and auto professionals
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Any business that wants to look sharp and professional
