--- product_id: 180491840 title: "Wisesorb 7.5 LBS 4A Molecular Sieve, Premium Quality Desiccant Bulk Material" brand: "wisesorb" price: "$184.93" currency: USD in_stock: true category: "Wisesorb" url: https://www.desertcart.us/products/180491840-wisesorb-7-5-lbs-4a-molecular-sieve-premium-quality-desiccant store_origin: US region: United States of America --- # Fast adsorption speed Operates at -20°C Reactivatable at 550°C Wisesorb 7.5 LBS 4A Molecular Sieve, Premium Quality Desiccant Bulk Material **Brand:** wisesorb **Price:** $184.93 **Availability:** ✅ In Stock ## Summary > 💧 Stay dry, stay ahead — premium moisture control for the savvy pro. ## Quick Answers - **What is this?** Wisesorb 7.5 LBS 4A Molecular Sieve, Premium Quality Desiccant Bulk Material by wisesorb - **How much does it cost?** $184.93 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/180491840-wisesorb-7-5-lbs-4a-molecular-sieve-premium-quality-desiccant) ## Best For - wisesorb enthusiasts ## Why This Product - Trusted wisesorb brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Bulk & Control:** 7.5 lbs in an ergonomic dual-handle container for effortless pouring and precise use. - • **Rapid Moisture Lock:** Absorbs over 17% of its weight in water vapor at room temp for unbeatable dryness. - • **Reusable Powerhouse:** Easily reactivated by baking at 550°C, extending lifespan and saving costs. - • **Extreme Temp Resilience:** Performs flawlessly even in freezing conditions down to -20°C, perfect for any environment. - • **Versatile Storage Solution:** Ideal for protecting sensitive items in custom mesh bags, jars, or storage bins—never worry about moisture again. ## Overview The Wisesorb 7.5 LBS 4A Molecular Sieve is a premium-grade desiccant designed for rapid and efficient moisture absorption. With granules sized 1.5-2.5mm, it captures molecules under 0.4nm, absorbing over 17% of its weight in water vapor at 25°C and 20% RH. It operates effectively in extreme cold (-20°C) and can be reactivated by high-temperature baking (550°C), making it a sustainable, bulk moisture control solution ideal for professional and industrial use. ## Description desertcart.com: Wisesorb 7 LBS 4A Molecular Sieve, Premium Quality Desiccant Bulk Material : Health & Household ## Features - 【4A MOLECULAR SIEVE】: 7lbs molecular sieve utilize premium quality raw material. The 4A molecular sieve has a fast adsorption speed. With the capability of absorbing molecules with a diameter of no more than 0.4nm. At 77℉/25°C, RH20% it can absorb more than 17% of of its weight in water vapor. IT can also be used in extremely low temperatures of -4℉/-20°C. Each granule is 1.5-2.5mm in size. - 【EASY-TO-POUR】: Our easy-pour container offers both capacity and control. The multi-pound volume holds a generous number of desiccant beads that is easy to carry and pour thanks to a unique handle design. The dual-handle design accommodates multiple hand positions for better maneuverability and control. - 【REACTIVE】: The 4A molecular sieve granules can be placed in a muffle furnace and baked at 550 ° C (1020°F) for 3 hours, then transferred to a drying cylinder, and cooled to room temperature for use. - 【HOW TO USE】: Place 4A molecular sieve granules into an enclosed storage space, until it needs to be replaced. - 【BULK BEADS WEIGHT】: 1 gallon of 7LBS. Do not use them for drying flowers; You can place the beads inside fine mesh food straining bag, mesh bag, T-Sac tea filters, tea bags, drawstring organza bag, muslin bag, mason jar, dryer containers, knee high nylon stockings, clear plastic storage bin, mesh laundry bags or women's hosiery. Even make your own bags and size them to the specific use. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07YN576YJ | | Best Sellers Rank | #78,372 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #150 in Desiccants | | Date First Available | August 8, 2019 | | Item Weight | 8.09 pounds | | Item model number | 1 | | Manufacturer | Wisesorbent Technology LLC | | Product Dimensions | 9.06 x 3.74 x 11.61 inches | ## Images ![Wisesorb 7.5 LBS 4A Molecular Sieve, Premium Quality Desiccant Bulk Material - Image 1](https://m.media-amazon.com/images/I/615tE1OSssL.jpg) ## Available Options This product comes in different **Color, Size** options. ## Questions & Answers **Q: Does 4A Molecular Sieve come activated?** A: yes **Q: Which molecular sieve size is best for water absorption? Are any of the molecular sieves able to be reactivated in a typical house oven?** A: 13X molecular sieve is best for liquid water absorption. All types of molecular sieve have to be baked at 550℃/1022℉ to be fully reactivated. If you use a house oven, the molecular sieve can be reactivated at some level, but not fully reactivated. **Q: Are these 4A beads pre-activated or do I have to bake them before use?** A: They come activated! They work great! ## Frequently Bought Together - Wisesorb 7.5 LBS 4A Molecular Sieve, Premium Quality Desiccant Bulk Material - Wisesorb 2 LBS Activated Alumina, Alumina Desiccant, 1 Quart Reusable Dessicant Dehumidifiers Desiccant Moisture Absorber - Wisesorb 2 LBS 3A Molecular Sieve Desiccant Beads, Dehumidifier Moisture Absorbers --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/180491840-wisesorb-7-5-lbs-4a-molecular-sieve-premium-quality-desiccant](https://www.desertcart.us/products/180491840-wisesorb-7-5-lbs-4a-molecular-sieve-premium-quality-desiccant) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-31*