Guam tar
A thick, foul-smelling, tar-like substance with a green tinge.
33gp
17gp
16gp
+16gp
—
—
Price history
1 points · hover for detail
- 30D low
- 17
- 30D high
- 33
- Volatility
- 64.0%
Flip calculator
Includes the 2% Grand Exchange tax
+16gp
+16 per item · +94.12% ROI
- Capital required
- 17 gp
- Gross revenue
- 33 gp
- GE tax (2%, 0/item)
- − 0 gp
- Break-even sell
- 17 gp
Item data
- High alchemy
- 1 gp97.0% below market
- Low alchemy
- 1 gp
- Shop value
- 3 gp
- Weight
- 0 kg
- Skill / type
- Ammo
- Requires
- Herblore 19
- Stack / note
- Stackable · not noteable
- Released
- Nov 21, 2006
About Guam tar
The Guam tar is a members-only type of ammunition in Old School RuneScape.
"A thick, foul-smelling, tar-like substance with a green tinge"
Over the last 30 days it traded between 6 and 39 gp on the Grand Exchange, averaging 15 gp. About 100,313 units changed hands per day. The price is up 116.7% across that window. The Grand Exchange buy limit is 7,000 every 4 hours.
Casting High Level Alchemy returns 1 gp, which is 93.3% below the 30-day average price, so alching a bought one loses money.
Recipes
Where this item appears in crafting and processing.
Made from
- 15× Swamp tar, 1× Guam leaf makes 15
- 15× Swamp tar, 1× Ground guam makes 15
Guam tar price history
Daily averages rolled up per month, newest first.
| Month | Average | Low | High | Volume |
|---|---|---|---|---|
| October 202612d | 14 | 7 | 39 | 1,494,535 |
| September 2026 | 15 | 6 | 22 | 2,327,271 |
| August 2026 | 13 | 8 | 24 | 2,834,014 |
| July 2026 | 13 | 8 | 26 | 2,557,674 |
| June 202621d | 10 | 8 | 12 | 896,754 |
| May 20262d | 8 | 7 | 8 | 99,005 |
| April 20261d | 10 | 10 | 10 | 38,789 |
| March 2026 | 15 | 9 | 22 | 677,119 |
| February 2026 | 12 | 10 | 15 | 77,108 |
| January 2026 | 7 | 4 | 11 | 17,856 |
Across 10 months of recorded prices Guam tar ranged from 4 gp in January 2026 to 39 gp in October 2026, measured over 218 trading days.
The 30-day average of 15 gp sits in the lower third of that range.
All prices in gp. Volume counts units traded across both sides of the Grand Exchange.
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