HDPE vs. Acrylic for Hot Tub Shells

HDPE Tub Shells

• HDPE stands for high density polyethylene. It may be found in a variety of products such as football helmets and bed liners for trucks. This material is regarded as indestructible and is able to withstand continually use without showing signs of wear-and-tear. Hot tub manufacturers typically utilize this material as it can undergo freezing without cracking, and its smooth surface is comfortable to rest on. One of the main benefits of an HDPE hot tub shell is its resistance to corrosion, which is vital as it spends the majority of its life submerged in chemically treated water. This form of plastic can withhold up to 5,000 pounds of pressure per square foot, thus making it ideal for large hot tubs.

Acrylic Tub Shells

• Acrylic is the most common type of hot tub shell as it is among the least expensive shell materials, and it can withstand years of continual use. Because acrylic is lightweight, many hot tub manufacturers utilize this material as it allows the tub to be placed on decks and other structures that have a weight limit. As a hot tub is drained and refilled, the shell is exposed to rapidly changing temperatures. Acrylic is able to maintain its shape and integrity with regular maintenance, thus prolonging its operating life.

Similarities

• Perhaps one of the most notable similarities between an HDPE and acrylic hot tub shell is its ability to be designed in a variety of shapes. Because both of these materials are formed by heating it to a high temperature, you may have a custom designed hot tub without undergoing the cost associated with a concrete or cement hot tub. Both offer long shelf lives, with many manufacturers offering a lifetime guarantee.

Differences

• The primary difference between an HDPE and an acrylic hot tub is the price. Generally, HDPE hot tubs are more expensive than acrylic due to the manufacturing process. For example, a four-person HDPE hot tub has an average cost of $3,500 to $4,000 while a comparable four-person acrylic hot tub has an average cost of $2,800 to $3,200. However, the actual price can vary as some acrylic hot tubs may be more expensive due to additional features such as speakers or televisions while some HDPE hot tubs may be cheaper if it a basic model. Overall, there is very little difference between an HDPE and an acrylic hot tub beyond the material it is made of.