Refer to the below information for steps of the manufacturing process of fiberglass and acrylic.

Fiberglass:

1
Gelcoat material is sprayed onto a mold to provide the shape of the product.

2
A fiberglass and resin mix is applied to the gelcoat layer to provide strength.

3
The product is then rolled out to remove air bubbles between the gelcoat and FRP (Fiberglass Reinforcement Product) layers. This prevents air voids which can cause cracks.

4
Wood reinforcement and foam strips are placed on the flooring and wall areas to add strength and stiffness to the product.

5
The product is then given another FRP layer to add strength.

6
The unit is removed from the mold and sent to be trimmed, ground and drilled where excess material is removed and the holes are drilled for grab bars, drains or whirlpool jets.

Acrylic:

1
An acrylic sheet is warmed in an oven, then placed in a vacuum mold. Air is removed from the mold and the acrylic takes the shape of the mold.

2
A fiberglass and resin mix is applied to the acrylic layer to provide strength.

3
The product is then rolled out to remove air bubbles between the acrylic and FRP (Fiberglass Reinforcement Product) layers. This prevents air voids which can cause cracks.

4
Wood reinforcements are placed on the flooring and wall areas to add strength and stiffness to the product.

5
The product is then given another fiberglass layer to add strength.

6
Lastly, the unit is sent to be trimmed and drilled for placement of grab bars, drains or whirlpool jets.