Backyard Boatworks

Polyester Resin Boatyard Grade

Sale price Price $39.87 Regular price $39.87 Unit price  per 

Boatyard Grade Polyester Resin 1 Gallon each.

This is an economical laminating resin for repairs on boats, small parts production, autos, etc. Not recommended for use below the waterline.

Non-spec resin. Contains a mix of different types of resins: ortho-, iso- & low profile. This resin may or may not contain wax. If the resin is allowed to completely cure it MUST be sanded before applying any additional layers of lamination.  Ideally, all layers should be completed in one session to allow each layer to cure together. Do not use below the waterline. Product instructions included. MEKP (sold separately).


Avoid using this product in direct sunlight.

The ideal temperature for use of this product is 77°F. The best results for this product can be obtained at temperatures between 70°F and 85°F, in a clean, dry, dust-free environment.

It is not recommended to wet out fiberglass over 1/8 in thickness. Use of more than 1/8 may generate excessive heat. Allow layers to tack up (but not fully cure) prior to pouring the next layer.

Boatyard Polyester Resin is a non-specified resin that contains different types of polyester resins and wax. Material may cure hard and tack-free due to wax. If so, the product will need to be sanded prior to adding another layer in order to promote good bonding.

If sanding is required to apply more fiberglass, use 36, 24, or 16 grit. Low grits will create deeper scratches to make the new layer adhere better to the existing one. Be sure to clean the surface before applying another layer.

To apply Gelcoat, prep the surface with 80 grit sandpaper. To apply primer, prep the surface with 220 grit sandpaper. To apply paint, prep the surface with 320 grit sandpaper.

If you have any additional questions about this product please use our TEXT SERVICE LINE 954-406-2318  ** this number accepts text messages only **

Directions for Use:
Step 1: Choose the appropriate volume for your project. The type of fiberglass used will determine the amount of resin needed.
Step 2: Make sure to agitate or stir the product thoroughly before use.
Step 3: Mix 1 to 2% MEKP, in resin solution thoroughly. 
Step 4: Thinner fiberglass can easily be wet through. To thoroughly wet out heavier materials, apply resin first to one side, then flip the glass over to wet out the other side. Use paint-style rollers to distribute resin quickly.
Step 5: Roll each layer with a glass roller to remove air. The fiberglass will turn completely transparent when it is adequately wet.