Introducing

Summer
bass rosin

The feel you love. The stability you didn't know you could have.

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" This stuff works!

Timothy Cobb Principal Bass, New York Philharmonic

For the first time, I feel like I get that spring/fall rosin punch during the coldest time of the year.

Glenn Gordon Assistant Principal Bass, Oslo Philharmonic

Handled Swiss winter with no problem, including an outdoor Christmas gig in the snow!

Orr Paradise International Jazz Bassist

It's the first rosin I've used that doesn't have issues with consistency, so I don't have to overthink when to put it on.

Paul Nemeth Associate Principal Bass, The Florida Orchestra

I am able to get the most delicate and raucous of articulations and sound with everything in between.

Abe Gumroyan Grammy Award-Winning Bassist, Los Angeles

Provided voluntarily, without compensation.

"Rosin that lasts forever is a terrible business idea."
— Everyone

Traditional bass rosin dries out in cold or dry conditions, making a clear, powerful sound impossible.

Winter stays good year after year.

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Cold and dry conditions

Winter

$51.18

Free shipping

Stable Non-drying, non-powdering, good 5+ years.

Dynamic Gentle start on soft notes with punchy grab under pressure.

Versatile Works alone or as a base-layer boost.

Warm and humid conditions

Summer

$51.18

Free shipping

Clean Immediate catch with a smooth release from the string.

Balanced Solid grab without the gritty or over-sticky feel.

Durable Stays stable in heat without turning glassy.

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If your country isn't listed, email bassmentrosin@gmail.com to order directly.

The Story

Bassment Rosin

I'm Isaac Trapkus, a bassist in the New York Philharmonic.

Bassment Rosin grew out of my frustration with rosin and lifelong habit of starting overly complicated projects.

Watch the demo — hear the difference.

2019

Started trying to solve rosin problems from the player side: stability, consistency, and reliable grab.

100+
attempts

Learned that bass rosin is not just "make it stickier." The hard part is balancing grip, release, temperature, and long-term stability.

Winter
Summer

Winter solved the cold/dry problem. Summer extends the same idea to warmer conditions: solid grab without the gritty, glassy, or over-sticky feel.

Questions

Everything you need to know about Winter.

Summerbass rosin