Why does my tub lid have a gap? Will it still seal?Updated 3 hours ago

Overview
Some customers notice that their Modtub lid doesn’t sit flush with the tub body or that there are visible gaps. This article explains why that happens, why it’s normal, and why it doesn’t affect your tub’s performance.

Why gaps happen

• Molding process: The body and lid are molded separately. Because of this, it’s nearly impossible to get a “perfect” visual alignment every time.

• Temperature expansion: Plastic naturally expands and contracts with changes in temperature. On hot days the gap may look smaller; on cold days it may appear larger.

Why performance is unaffected

• Your tub is designed with an oversized gasket around the lid — much larger than what’s standard in the industry.

• This gasket compresses against the tub body every time the lid closes, creating a tight seal.

• Even if the lid doesn’t line up cosmetically, the seal still protects performance, temperature control, and cleanliness.

What this means for you

• Gaps are aesthetic only. They are not considered a defect and are not eligible for replacement.

• You can rest assured your Modtub is performing exactly as it should.

See it for yourself
Watch this short video where we show a typical lid gap and explain how the gasket works to maintain a tight seal: