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420 Science Promo Codes & Coupons September 2026 — Up to 30% Off

All Valid 420 Science Coupons & Discount Codes - Up To 30% OFF in September 2026

Last updated: Sep 27, 2026

25% Off (Sitewide) at 420 Science

Exp: Nov 27, 2026

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SMOKEBREAK

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At 420 Science Take 25% Off Storewide

Exp: Nov 27, 2026

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Dabonsailor

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20% Off Select Items at 420 Science

Exp: Nov 27, 2026

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420JARPACK

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$15 Off X-Large Uv Screw-Top - 420 Cat at 420 Science

Exp: Nov 27, 2026

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PERFECT2UV

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10% Off Storewide at 420 Science

Exp: Nov 27, 2026

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BLES-WP3UYC

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10% Off (Across the Store) at 420 Science

Exp: Nov 27, 2026

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ZJ76KPLV

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$5 Off Uv Screw-Top 420 Jars (Minimum Purchase of $70) at 420 Science

Exp: Nov 27, 2026

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UVPACK

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5% Off Select Items at 420 Science

Exp: Nov 27, 2026

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TIME2REUP

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Get an Extra Large and Receive the Extra Small Specific Categories at 420 Science

Exp: Nov 27, 2026

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PERFECT2SCREW

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Free Gift Across the Store (Must Order 2) at 420 Science

Exp: Nov 27, 2026

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PERFECT2POP

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20% Off Select Items at 420 Science

Exp: Nov 09, 2026

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WATERWORKS

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10% Off (Sitewide) At 420 Science

Exp: Oct 20, 2026

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BLEXQ225-V44D67

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25% Off Select Items At 420 Science

Exp: Oct 10, 2026

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CATSINTHECRADLE

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30% Off Sitewide At 420 Science

Exp: Sep 30, 2026

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NAMESAKE2026

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Save 20% Off X-Small Pop-Top - Modern Write And Erase Min Order: 6 Items At 420Science.com

Verified

Verified · 7+ days ago

Exp: Soon

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420JARPACK

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Flash Discounts: 10% Off Sitewide

Verified

Verified · 7+ days ago

Exp: Soon

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BLES-D4W3GD

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Get 10% Off Coupon Code On Your First Purchase At 420 Science

Verified

Verified · 7+ days ago

Exp: Soon

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BLES-JUQ7ZP

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Select The Best Of Spring Items To Run A Huge 10% Off Sale At 420 Science

Verified

Verified · 7+ days ago

Exp: Soon

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BLES-6QHAWM

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Grab This 10% Reduction At 420Science.com

Verified

Verified · 7+ days ago

Exp: Soon

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BLES-ZAZJTZ

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Smart Shopping: Up To 10% Off With 420 Science Coupon

Verified

Verified · 7+ days ago

Exp: Soon

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BLES-hjwhpq

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As Low As 10% Off, Come And Enjoy It

Verified

Verified · 7+ days ago

Exp: Soon

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BLES-WP3UYC

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Enjoy 10% Off At The 420Science.com Checkout

Verified

Verified · 7+ days ago

Exp: Soon

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STRAINCENTRAL

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$5 Off Select Styles

Verified

Verified · 7+ days ago

Exp: Soon

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UVPACK

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Enjoy 30% Off At 420Science.com

Exp: Soon

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420bong30

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25% Off Sitewide With 420 Science Coupon Code

Exp: Soon

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HIGHJINKS

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420 Science Offer: Sign Up And Saving 20%

Exp: Soon

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Best Selling Bongs 20% Off With 420 Science Discount

Exp: Soon

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420 Science Offer: Be A Member And Saving 15%

Exp: Soon

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$15 Off Some Orders

Exp: Soon

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PERFECT2UV

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10% Off Myster Stash Box. Exclusions: Using Vpn Works For U.s.a. Store. With Code

Exp: Soon

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PODCAST

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Enjoy 10% Off 420 Science Discount Code

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BLES-U357BX

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Get An Extra 10% Off Select Items At 420 Science

Exp: Soon

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Free Shipping Ships Tomorrow Secure Checkout Easy Returns

Exp: Soon

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Buy One Get One Free On Select Items At 420 Science

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Get An Extra Large And Receive The Extra Small

Exp: Soon

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PERFECT2SCREW

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Massive Savings With Coupon At 420Science.com

Exp: Soon

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PERFECT2POP

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Sitewide Clearance: Save Big On All Items

Exp: Soon

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BUY1GET1

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Treat Your Senses To Something New With The Latest Promotions

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RIGFREEBIE

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Half Off Select Bangers With Code

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THISBANGERSUCKS

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Get $30 Off Small Wide-Mouth - 420 Science Logo At 420Science.com With Promo Code

Exp: Soon

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WIDE3PACK

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Take 20% Off Your Purchase

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HALEY20

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Hurry Up! Don't Miss This Discount

Exp: Soon

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42011

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Your Orders Placed At 420 Science Ship For Free Now

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FREESHIP

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Free Shipping $75+

Exp: Soon

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Shop These Top Sale Items At 420Science.com And Save While You Are At It. Be The First To Enjoy Savings At Unbeatable Prices

Exp: Soon

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FREEGRINDER

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420 Science Promo Code: 20% Off

Exp: Soon

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MEMDAY2024

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Grab Your Favorites Before They're Gone

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MEM23

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Well 420 Science Want To Send You $45 Worth Of Freebies Here’s The Deets

Exp: Soon

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Receive An Exclusive Offer At 420Science.com

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FITCheck

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Free Expedited Shipping On Orders Over $75

Exp: Soon

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Take 25% Off With These Verified 420 Science Promo Codes

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HIGHEST25

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Discover 20% Off With 420 Science Coupon Code

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BLKFRIDEALS20

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Get This Code And Save 15%

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EARLY

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Shop Now And Save 15% On Everything

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CHECKMATE15

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Exclusive Offer: Save 11% On Your Favorite Picks—Shop Now

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CHECKMATE11

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Sitewide Sale: Prices Cut On All Products

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3KSALE

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Limited-Time Offer: Elevate Your Style With The Latest Collection

Exp: Soon

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SPICYG7T

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Save Big On Selected Orders: Limited Time Offer

Exp: Soon

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SECRET420

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Selected Items At Unbeatable Prices: Huge Savings

Exp: Soon

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PERFECTBAG

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Expired 420 Science Coupons

It might still work.

25% Off Sitewide At 420 Science

Expired

Exp: Sep 01, 2026

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farewell2025

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15% Off Gummies At 420 Science

Expired

Exp: Aug 15, 2026

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goodgummies15

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25% Off Sitewide At 420 Science

Expired

Exp: Jul 23, 2026

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GO420!ITSURBDAY

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10% Off Any Order W/Coupon Code

Expired

Exp: Jan 14, 2026

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BLES-WP3UYC

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Free Gift On Store-Wide (Must Buy 2 Pop-Tops) At 420Science.com W/Coupon Code.

Expired

Exp: Jan 14, 2026

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PERFECT2POP

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Save 25% Off Sitewide At 420Science.com W/Coupon Code

Expired

Exp: Jan 14, 2026

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farewell2025

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Extra 20% Off Sitewide At 420Science.com W/Coupon Code

Expired

Exp: Jan 14, 2026

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ghost&darkness

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Save 20% Off X-Small Pop-Top - Modern Write & Erase (Min Order: 6 Items) At 420Science.com.

Expired

Exp: Jan 14, 2026

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420JARPACK

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Get $15 Off X-Large Uv Screw-Top - 420 Cat At 420Science.com.

Expired

Exp: Jan 14, 2026

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PERFECT2UV

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Get $5 Off $70 And Above Uv Screw-Top 420 Jars At 420Science.com.

Expired

Exp: Jan 14, 2026

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UVPACK

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Get An Extra Large And Receive The Extra Small On Eligible Categories At 420Science.com.

Expired

Exp: Jan 14, 2026

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PERFECT2SCREW

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12% Off Select Items At 420Science.com

Expired

Exp: Jan 14, 2026

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HIGHJINKS

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Save 5% Off Select Items At 420Science.com

Expired

Exp: Jan 14, 2026

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TIME2REUP

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Get An Extra 30% Off Bongs At 420Science.com

Expired

Exp: Jan 14, 2026

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420bong30

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Save 20% Off All + Sitewide At 420Science.com

Expired

Exp: Jan 14, 2026

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710save20

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Save 20% Off All + Sitewide At 420Science.com

Expired

Exp: Jan 14, 2026

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MEMDAY2024

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Extra 25% Off Sitewide At 420Science.com W/Promo Code

Expired

Exp: Jan 14, 2026

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Highest25

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20% Off 420 Collection At 420Science.com

Expired

Exp: Jan 14, 2026

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420HPA20

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With 420 Science Promo Code Up To 20% Off Sitewide At 420Science.com

Expired

Exp: Jan 14, 2026

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bdaybash20

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Free Gift On Sitewide At 420Science.com W/Coupon Code

Expired

Exp: Jan 14, 2026

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SECRET420

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About 420 Science

http://www.420science.com

420 Science is the most trusted online headshop. Check out the array of 420 Jars for both flower or concentrate, small to extra large, each with a decorative decal to fit your lifestyle!420 Science is the makers of RezBlock and Smoke Soap, all natural resin prevention cleaning products. 420 Science features products from the most innovative and respected brands in the market including GRAV, PAX, ROOR, Storz & Bickel, Dime Bags, and much more. 420 Science has guaranteed service, fair prices, and new and exciting products to attract more and more customers both online and in-store. If you want to know 420 Science promotions and coupon codes, you can come and visit our coupon site.

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