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- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 5 - Jul 10
For Your Every Summer RSVP, with Code: SUMMER15
Description
Rock Resinator Heavy Yields, 20 LRock Resinator uses an extensive and complex combination of phosphorus and potassium designed to pack on extra size and weight. Using the finest and most refined natural base elements and plant extracts ensures your favorite plants are given the best opportunity to develop to their full potential. Use Rock Resinator starting the second week of flowering through harvest at a rate of 4 ml gal for lower EC and up to 8 ml gal for higher EC. Shake well

Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 2214 reviews
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Product Reviews
★★★★★ 5
Good stuff, fair price.
Configuration: 4-Stroke, Size: 1 GA
Great full synthetic marine oil at a very fair price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 12, 2025
★★★★★ 5
Top notch.
Configuration: 2-Stroke, Size: 1 GA, Case of 3
It’s Valvoline so it’s quality. Very little smoke and a smooth running outboard.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 4, 2026
★★★★★ 5
works perfect
Configuration: 4-Stroke, Size: 1 GA
i bought to maintain mowers
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Reviewed in the United States on December 28, 2025
★★★★★ 5
good value
Configuration: 4-Stroke, Size: 1 GA
good value and marine rating on the lable
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Reviewed in the United States on April 26, 2026
★★★★★ 5
Will buy again!
Configuration: 4-Stroke, Size: 1 GA, Configuration: 4-Stroke, Size: 1 GA
This is my second time using this oil to service my 2022 Mercury 90 outboard. Excellent oil! Engine runs extremely smooth. The jug was very easy to pour from. No smoke from the engine.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 18, 2026
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